{"title":"Troubleshooting_Pumps_collection","description":"","products":[{"product_id":"troubleshooting-vacuum-pumps","title":"Troubleshooting Vacuum Pumps","description":"\u003cp\u003ePlease select the type of laboratory vacuum pump you need to troubleshoot by clicking the illustration of your pump. Once you have made the selection you will see common vacuum pump problems for your style of vacuum pump.\u003c\/p\u003e","brand":"ChemTechSCI","offers":[{"title":"Default Title","offer_id":34558771593,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/troubleshooting-vacuum-pumps-235038507104.png?v=1779793741"},{"product_id":"belt-driven-vacuum-pump","title":"Belt Driven Vacuum Pump","description":"Clicking on the problem you need to resolve will bring you to the most successful troubleshooting steps. Please\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e \u003ca href=\"https:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003econtact us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e, if the trouble shooting guide did not resolve your problem and our vacuum experts will be eager to assist you.","brand":"consult_t_","offers":[{"title":"Default Title","offer_id":34558826377,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/belt-driven-vacuum-pump-238368817248.png?v=1779796715"},{"product_id":"direct-drive-vacuum-pump","title":"Direct Drive Vacuum Pump","description":"Clicking on the problem you need to resolve will bring you to the most successful troubleshooting steps. Please\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e \u003ca href=\"https:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003econtact us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e, if the trouble shooting guide did not resolve your problem and our vacuum experts will be eager to assist you.","brand":"consult_t_","offers":[{"title":"Default Title","offer_id":34558830025,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/direct-drive-vacuum-pump-238368948320.png?v=1779793744"},{"product_id":"dry-diaphragm-vacuum-pumps","title":"Dry Diaphragm Vacuum Pump","description":"\u003cp\u003eClick a pump image below to select the type of laboratory vacuum pump you need to trouble shoot. Once you have made the selection you will be see common vacuum pump problems for your style of vacuum pump. Tapping on the problem you need to resolve will bring you to the most successful trouble shooting steps. Please contact us, if the trouble shooting guide did not resolve your problem. Our vacuum experts are eager to assist you.\u003c\/p\u003e","brand":"consult_t_","offers":[{"title":"Default Title","offer_id":34558879433,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/dry-diaphragm-vacuum-pump-238368981088.png?v=1779793736"},{"product_id":"dry-piston-vacuum-pump","title":"Dry Piston vacuum Pump","description":"\u003cp\u003ePlease select the type of laboratory vacuum pump you need to troubleshoot by clicking the illustration of your pump. Once you have made the selection you will see common vacuum pump problems for your style of vacuum pump.\u003c\/p\u003e","brand":"consult_t_","offers":[{"title":"Default Title","offer_id":34558917001,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/dry-piston-vacuum-pump-238369013856.png?v=1779796207"},{"product_id":"dry-scroll-vacuum-pump","title":"Dry Scroll Vacuum Pump","description":"Clicking on the problem you need to resolve will bring you to the most successful troubleshooting steps. Please\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e \u003ca href=\"https:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003econtact us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e, if the trouble shooting guide did not resolve your problem and our vacuum experts will be eager to assist you.","brand":"consult_t_","offers":[{"title":"Default Title","offer_id":34558941449,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/dry-scroll-vacuum-pump-238369046624.png?v=1779796218"},{"product_id":"pump-wont-start","title":"Pump Won't Start","description":"\u003cstrong\u003eIf for any reason the pump will not operate:\u003c\/strong\u003e\n\u003cp\u003e1- Turn off the power and check the fuse and electrical connections.\u003c\/p\u003e\n\u003cp\u003e2- Test the power to the \"motor only\" by removing the belt.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003ea) Unplug pump motor from power source.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003eb) Taking care not to pinch fingers, belt can be removed similar to a bicycle chain removal procedure.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003ec) Plug into power source.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003ed) Taking care to avoid potentially spinning motor pulley, turn motor power to the on position.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003ee) If motor pulley spins, the motor is good and the vacuum pump is seized.\u003c\/p\u003e\n\u003cp\u003e3- Try manually turning pump - With belt removed, as in 2 above, try hand-rotating the pump pulley clockwise with the pump intake port open. If pump will not turn, sometimes rocking the pulley back and forth (clockwise, counter -clockwise) will free the pump. If the pump will not turn by hand, using only hand strength, do not use leveraging or power tools to turn the pump pulley, because vital, expensive pump parts may be damaged. It is best at this point to professionally service the pump.\u003c\/p\u003e\n\u003cp\u003e4- If motor pulley does not spin - Compare the pump motor rating, printed on a label on the side of the motor and on the serial number tag, to the power source, to be sure they agree in voltage, phase, and frequency. If power source is correct and motor pulley will not spin, the motor needs replacing.\u003c\/p\u003e\n\u003cp\u003eIf both motor and pump turn freely then replace the belt and check the belt tension. The tension should be sufficient to drive the pump without visible slippage. Any greater tension will cause noise and possible damage to the bearings of both the motor and pump. Make certain that both pulley grooves are clean and free from oil. The pulleys must be fastened securely on their respective shafts, and in parallel alignment. Use a straight edge to inspect belt alignment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIf pump or motor is seized, \u003c\/strong\u003e\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"https:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003econtact us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for Do-It-Yourself Pump Repair support or to \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eschedule a repair\u003c\/a\u003e\u003c\/strong\u003e\u003cspan style=\"color: #000000;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"consult_t_1","offers":[{"title":"Default Title","offer_id":34559012873,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-won-t-start-238369308768.png?v=1779793742"},{"product_id":"pump-starts-with-insufficient-vacuum","title":"Pump Starts with Insufficient Vacuum","description":"\u003cp\u003e1- The primary cause of insufficient vacuum is due to system leaks. To confirm the vacuum pump is not generating sufficient vacuum, disconnect the pump from the application and test pump with a vacuum gauge. You can purchase a gauge\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e \u003ca href=\"http:\/\/www.chemtechsci.com\/collections\/chemtech-scientific\" style=\"color: #0000ff;\"\u003ehere\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e or contact \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eChemtech Scientific\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e to evaluate your pump free of charge.\u003c\/p\u003e\n\u003cp\u003eIf  the vacuum gauge confirms pump achieves good vacuum isolated from the system, you have a system leak(s).\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003ea) Check all connections in system for tightness and tight seal.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003eb) Hoses and Gaskets - Examine hoses and gaskets visually for cracks. If cracks have developed or if the tubes and gaskets have become brittle, replace them with suitable new ones.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003ec) Ports open to atmosphere - Check all port valves and confirm they are completely closed, International manufactured valves may close in a different position than domestic manufactured valves. Please consult product literature or manufacturer to assure correct position of vales open or closed.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003ed) Leak test application appliance. Leak testing application appliance may be performed with soapy water and pressure or acetone leak testing under vacuum. A vacuum gauge will be need for these tests. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e \u003c\/span\u003e\u003c\/strong\u003e for a laboratory visit or detailed leak testing support.\u003c\/p\u003e\n\u003cp\u003e2- If the gauge pressure reading from a gauge sealed tightly to the pump inlet is above 1 Torr, the pump will require \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e3- If the pump pressure reading is below 1 Torr, a fresh oil change may resolve the problem. The most common cause of a loss in efficiency in a mechanical pump is contamination of oil. It is caused by condensation of vapors and by foreign particles. The undesirable condensate emulsifies with the oil which is re-circulated and subject to re-evaporation during the normal cycle of pump activity, thus reducing the ultimate vacuum attainable. Some foreign particles and vapors may form a sludge with the oil, impair sealing and lubrication and cause eventual seizure.\u003c\/p\u003e\n\u003cp\u003e4- Periodic oil changes are necessary to maintain efficient operation of the system. The required frequency of changes will vary with the particular system. Experiences with the process will help you determine the normal period of operation before an oil change is required.\u003c\/p\u003e\n\u003cp\u003e5- A two stage oil sealed pump should be capable of achieving 10 microns ultimate pressure with gas ballast closed. A single stage pump should obtain 100 microns ultimate pressure.\u003c\/p\u003e\n\u003cp\u003e6- If your problem cannot be resolved using the above troubleshooting steps, \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"https:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003econtact us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e \u003cspan style=\"color: #0000ff;\"\u003e\u003c\/span\u003efor more troubleshooting assistance.\u003c\/p\u003e","brand":"consult_t_1","offers":[{"title":"Default Title","offer_id":34559020553,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-starts-with-insufficient-vacuum-238369210464.png?v=1779793943"},{"product_id":"pump-leaks-oil","title":"Pump Leaks Oil","description":"\u003cstrong\u003eLocation, Cause and Repair Techniques\u003c\/strong\u003e \n\u003cp\u003e\u003cstrong\u003e1- Location\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOil leaks may develop wherever two mating faces are sealed with a gasket. Such seams may fail as the result of deterioration of the gasket material, loosening of the screws caused by temperature variations, or improper care as the result of previous reassembly.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTypical gaskets seams in a mechanical pump are located at the oil level\u003c\/p\u003e\n\u003cp\u003ewindow, the shaft seal, the oil drain, and the mating faces of such mechanical surfaces as the intake chamber cover, the oil case, and the exhaust chamber cover. The importance of a gasket seam is determined principally by its function.\u003c\/p\u003e\n\u003cp\u003eIf it is a vacuum seal, the ultimate performance of the pump is dependent upon it. If it is an oil seal, the pump may be operated satisfactorily for some time without loss of function. Eventually, of course, a great loss of oil may cause harmful damage.\u003c\/p\u003e\n\u003cp\u003eLeaks from the pump's oil level window, shaft seal, or oil drain plug may be in-house repairable. \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e for the correct parts and repair advice.\u003c\/p\u003e\n\u003cp\u003eOil leaks from mating surfaces relating to the pumping module or oil case may require more technical skill to repair. \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e for the correct part, or have us \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/strong\u003e \u003c\/span\u003ethe pump for you.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2- Cause \u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ea) The primary cause of leaks is seal or gasket materials degrading to form leaks  due to contaminated vacuum pump oil. Regularly monitor the quality of vacuum pump oil and change at signs of poor oil quality. Maintaining good quality oil in your vacuum pump will eliminate most vacuum pump problems.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eb) Back pressure on the vacuum is caused by restricted or clogged exhaust line or  exhaust filter. Back pressure on pump places strain on seals and gaskets and can     deform seals to create oil leaks. Back pressure can also create hazardous conditions and force parts to blow off of the pump to become a projectile in the working environment.\u003c\/div\u003e\n\u003col\u003e\u003c\/ol\u003e\n\u003col\u003e\n\u003cli\u003ei) Always exhaust pump with the correct exhaust filter and replace filter element at signs of degrading, clogging or bubbling oil through housing. The wrong oil filter will restrict exhaust flow and create back pressure in pump.\u003c\/li\u003e\n\u003cli\u003eii) If venting pump exhaust through hose, tubing or pipe, always be certain to use the same inner diameter of tubing as the exhaust port of pump. If the exhaust port is 3\/4\", use 3\/4 inner diameter tubing for exhaust and so on. Restricting the exhaust of the pump will create back pressure and potentially a safety hazard.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col\u003e\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003e3- Repairing Techniques\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eBe sure to uncover and remedy cause of seal degradation prior to repairing to avoid future failures.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn oil seam may be sealed by any of several methods. When an O-ring is employed, the surfaces of the O-ring and its groove should be wiped clean. If the O-ring is not badly deformed or scratched it may be reused by sealing with a slight film of vacuum oil or vacuum grease. Thin composition gaskets are generally used for large irregularly shaped areas. A replacement joint of this type should be thoroughly cleaned of all previous gasket material and the mating surfaces cleaned of any nicks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Preparation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGood Vacuum seals are an essential and important attribute of a good mechanical pump. A good seal is dependent upon the quality of the mating surfaces as well as the sealant and its preparation. The mating faces\u003c\/p\u003e\n\u003cp\u003eshould be carefully inspected for any projections or foreign particles which might interfere with proper mating.\u003c\/p\u003e\n\u003cp\u003eSlight projections such as nicks and burrs are most easily removed by rubbing with a fine abrasive stone. The surface of the mating parts may be washed with a solvent or alcohol after which they must be thoroughly dried.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTemporary Repair\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTemporary vacuum repairs are often made by covering the known leak with an industrial sealant such as Loctite with PTFE. Such a practice, however, is not recommended for seals of a permanent nature.\u003c\/p\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for additional trouble shooting or repair assistance.","brand":"consult_t_1","offers":[{"title":"Default Title","offer_id":34559038473,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-leaks-oil-238369144928.png?v=1779797145"},{"product_id":"pump-sprays-oil-from-exhaust","title":"Pump Sprays Oil From Exhaust","description":"\u003col\u003e\n\u003cli\u003eCheck oil level. Maintain the level between the two lines on the oil window during operation. Too high a level will cause excess oil mist.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"2\"\u003e\n\u003cli\u003eDetermine the vacuum level in your system with a thermocouple gauge or manometer. Be sure the pump is operating at a pressure of 10 Torr or lower for continuous operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"3\"\u003e\n\u003cli\u003eA system leak(s) or degassing can cause excessive oil mist. Locate and seal the vacuum leaks. High vapor loads may require a larger pump to compensate. See Insufficient Vacuum section of this guide.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"4\"\u003e\n\u003cli\u003eAn oil eliminator can be installed for coalescing the oil mist from the exhaust gases. If an oil mist eliminator is already installed, the element may need to be replaced if saturated with oil. Open up oil mist eliminator and examine the element; replace if needed. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for correct mist eliminator parts.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"5\"\u003e\n\u003cli\u003eCheck the oil condition for any visible change in color or consistency. Contaminants in the oil can add to the amount of oil exhausted. Carry out a forced oil flush if contamination is discovered. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for forced oil flush instructions.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"6\"\u003e\n\u003cli\u003eCheck pump temperature. Normal operating temperature for a belt driven pump is approximately 130F degrees. Higher heat lessens viscosity of oil. Less viscous oil mists more than viscous oil.                                                                                          \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for more trouble shooting support, if these steps cannot resolve your problem.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"consult_t_1","offers":[{"title":"Default Title","offer_id":34559059721,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-sprays-oil-from-exhaust-238369177696.png?v=1779796195"},{"product_id":"pump-is-loud-noisy","title":"Pump is Loud\/Noisy","description":"\u003cp\u003eCheck Vacuum Pressure. Higher pressure increases noise emitting from pump. If pump vacuum pressure is below 1 Torr, Locate noise source on your vacuum pump (motor, belt, pump).\u003c\/p\u003e\n\u003cp\u003e1- If motor makes noise:\u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ea) Check for loose bolts on motor mount. Tighten bolts, if loose. If the motor is secured to base, the motor bearings may be worn and the motor may need to be replaced.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eb) Compare the pump motor rating, printed on a label on the side of the motor and on the serial number tag, to the power source, to be sure they agree in voltage, phase, and frequency.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cp\u003e2- If belt makes noise:\u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ea) The belt tension should be sufficient to drive the pump without visible slippage. Any greater tension will cause noise and possible damage to the bearings of both the motor and pump. Make certain that both pulley grooves are clean and free from oil. The pulleys must be fastened securely on their respective shafts, and in parallel alignment. Use a straight edge to inspect belt alignment.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eb) Pulley may be bent. If so, replace.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ec) Loose belt, tighten by loosening bolts on motor and moving motor away from pump until belt exhibits a 1\/2 inch deflection.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cp\u003e3- If pump makes noise:\u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ea) Vanes may be sticking, carry out a forced oil flush.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eb) Check vacuum is below 1 Torr in pressure. Higher pressures create loud gurgling noise and louder operating noises. Two stage oil sealed vacuum pumps must operate below 1 Torr, or will suffer premature wear, excessive loss of oil and pump failure. If pump is operating above 1 Torr, see Insufficient Vacuum section of this guide.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ec) Slapping noise is typical for some pumps operating certain processes, if pump is achieving good ultimate pressure and may not indicate pump damage.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cp\u003e4- If noise level is still unsatisfactory: \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for the correct parts and service support.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"consult_t_1","offers":[{"title":"Default Title","offer_id":34559078921,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-is-loud-noisy-238369112160.png?v=1779796207"},{"product_id":"pump-wont-start-1","title":"Pump Won't Start","description":"\u003cp\u003e\u003cstrong\u003eIf for any reason the pump will not operate: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1- Turn off the power and check the fuse and electrical connections. Compare the pump motor rating, printed on a label on the side of the motor and on the serial number tag, to the power source, to be sure they agree in voltage, phase, and frequency.\u003c\/p\u003e\n\u003cp\u003e2- The pump will not start against very cold viscous oil, (below 12C degrees). If oil in pump is cold and viscous, change oil with clean, warm oil.\u003c\/p\u003e\n\u003cp\u003e3- The exhaust port is blocked or restricted due to a clogged pipe, filter (if fitted).\u003c\/p\u003e\n\u003cp\u003e4- The pump has seized due to long storage\u003c\/p\u003e\n\u003cp\u003e5- Coupling or pump mechanism is seized. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for parts or\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e \u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe most common cause of of vacuum pump failure is contamination of oil.Oil contamination is caused by condensable vapor condensing in the pump as the mechanisms compress the vapor. The condensate emulsifies with the oil and is recirculated through the vacuum pump, forming a sludge or polymerized oil will adhere moving parts together when the pump is at rest, impairing the pump's ability to start.\u003c\/p\u003e\n\u003cp\u003ePeriodic oil changes are necessary to avoid the vacuum pump seizing due to poor quality of oil or contamination of the pump oil.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"consult_t_2","offers":[{"title":"Default Title","offer_id":34559231177,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-won-t-start-238369570912.png?v=1779793734"},{"product_id":"pump-starts-with-insufficient-vacuum-1","title":"Pump Starts with Insufficient Vacuum","description":"\u003cp\u003e1- The primary cause of insufficient vacuum is due to system leaks. To confirm the vacuum pump is not generating sufficient vacuum, disconnect the pump from the application and test pump with a vacuum gauge. You can purchase a gauge\u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e \u003ca href=\"http:\/\/www.chemtechsci.com\/collections\/chemtech-scientific\" style=\"color: #0000ff;\"\u003ehere\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e. Or,  contact \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eChemtech Scientific\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e to evaluate your pump free of charge.\u003c\/p\u003e\n\u003cp\u003e2- If the gauge pressure reading from a gauge sealed tightly to the pump inlet is above 1 Torr, the pump will require \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e3- If the pump pressure reading is below 1 Torr, a fresh oil change may resolve the problem. The most common cause of a loss in efficiency in a mechanical pump is contamination of oil. It is caused by condensation of vapors and by foreign particles. The undesirable condensate emulsifies with the oil which is re-circulated and subject to re-evaporation during the normal cycle of pump activity, thus reducing the ultimate vacuum attainable. Some foreign particles and vapors may form a sludge with the oil, impair sealing and lubrication and cause eventual seizure.\u003c\/p\u003e\n\u003cp\u003e4- Periodic oil changes are necessary to maintain efficient operation of the system. The required frequency of changes will vary with the particular system. Experiences with the process will help you determine the normal period of operation before an oil change is required.\u003c\/p\u003e\n5- A two stage oil sealed pump should be capable of achieving 10 microns ultimate pressure with gas ballast closed. A single stage pump should obtain 100 microns ultimate pressure.","brand":"consult_t_2","offers":[{"title":"Default Title","offer_id":34559306697,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-starts-with-insufficient-vacuum-238369538144.png?v=1779796190"},{"product_id":"pump-leaks-oil-1","title":"Pump Leaks Oil","description":"\u003cstrong\u003eLocation, Cause and Repair Techniques\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003e1- Location\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOil leaks may develop wherever two mating faces are sealed with a gasket. Such seams may fail as the result of deterioration of the gasket material, loosening of the screws caused by temperature variations, or improper care as the result of previous reassembly.\u003c\/p\u003e\n\u003cp\u003eTypical gaskets seams in a mechanical pump are located at the oil level\u003c\/p\u003e\n\u003cp\u003ewindow, the shaft seal, the oil drain, and the mating faces of such mechanical surfaces as the intake chamber cover, the oil case, and the exhaust chamber cover. The importance of a gasket seam is determined principally by its function.\u003c\/p\u003e\n\u003cp\u003eIf it is a vacuum seal, the ultimate performance of the pump is dependent upon it. If it is an oil seal, the pump may be operated satisfactorily for some time without loss of function. Eventually, of course, a great loss of oil may cause harmful damage.\u003c\/p\u003e\n\u003cp\u003eLeaks from the pump's oil level window, shaft seal, or oil drain plug may be in-house repairable. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for the correct parts and repair advice.\u003c\/p\u003e\n\u003cp\u003eOil leaks from mating surfaces relating to the pumping module or oil case may require more technical skill to repair. \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e for the correct part, or have us \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e \u003c\/strong\u003e\u003c\/span\u003ethe pump for you.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2- Cause \u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ea) The primary cause of leaks is seal or gasket materials degrading to form leaks due to contaminated vacuum pump oil. Regularly monitor the quality of vacuum pump oil and change at signs of poor oil quality. Maintaining good quality oil in your vacuum pump will eliminate most vacuum pump problems.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eb) Back pressure on the vacuum is caused by restricted or clogged exhaust line or exhaust filter. Back pressure on pump places strain on seals and gaskets and can deform seals to create oil leaks. Back pressure can also create hazardous conditions and force parts to blow off of the pump to become a projectile in the working environment.\u003c\/div\u003e\n\u003col\u003e\n\u003cli\u003ei) Always exhaust pump with the correct exhaust filter and replace filter element at signs of degrading, clogging or bubbling oil through housing. The wrong oil filter will restrict exhaust flow and create back pressure in pump.\u003c\/li\u003e\n\u003cli\u003eii) If venting pump exhaust through hose, tubing or pipe, always be certain to use the same inner diameter of tubing as the exhaust port of pump. If the exhaust port is 3\/4\", use 3\/4 inner diameter tubing for exhaust and so on. Restricting the exhaust of the pump will create back pressure and potentially a safety hazard.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003e3- Repairing Techniques\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eBe sure to uncover and remedy cause of seal degradation prior to repairing to avoid future failures.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn oil seam may be sealed by any of several methods. When an O-ring is employed, the surfaces of the O-ring and its groove should be wiped clean. If the O-ring is not badly deformed or scratched it may be reused by sealing with a slight film of vacuum oil or vacuum grease. Thin composition gaskets are generally used for large irregularly shaped areas. A replacement joint of this type should be thoroughly cleaned of all previous gasket material and the mating surfaces cleaned of any nicks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Preparation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGood Vacuum seals are an essential and important attribute of a good mechanical pump. A good seal is dependent upon the quality of the mating surfaces as well as the sealant and its preparation. The mating faces\u003c\/p\u003e\n\u003cp\u003eshould be carefully inspected for any projections or foreign particles which might interfere with proper mating.\u003c\/p\u003e\n\u003cp\u003eSlight projections such as nicks and burrs are most easily removed by rubbing with a fine abrasive stone. The surface of the mating parts may be washed with a solvent or alcohol after which they must be thoroughly dried.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTemporary Repair\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTemporary vacuum repairs are often made by covering the known leak with an industrial sealant such as Loctite with PTFE. Such a practice, however, is not recommended for seals of a permanent nature.\u003c\/p\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for additional trouble shooting or repair assistance.","brand":"consult_t_2","offers":[{"title":"Default Title","offer_id":34559325193,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-leaks-oil-238369407072.png?v=1779797145"},{"product_id":"pump-sprays-oil-from-exhaust-1","title":"Pump Sprays Oil From Exhaust","description":"\u003col\u003e\n\u003cli\u003eCheck oil level. Maintain the level between the two lines on the oil window during operation. Too high a level will cause excess oil mist.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"2\"\u003e\n\u003cli\u003eDetermine the vacuum level in your system with a thermocouple gauge or manometer. Be sure the pump is operating at a pressure of 10 Torr or lower for continuous operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"3\"\u003e\n\u003cli\u003eA system leak(s) or degassing can cause excessive oil mist. Locate and seal the vacuum leaks. High vapor loads may require a larger pump to compensate.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"4\"\u003e\n\u003cli\u003eAn oil eliminator can be installed for coalescing the oil mist from the exhaust gases. If an oil mist eliminator is already installed, the element may need to be replaced if saturated with oil. Open up oil mist eliminator and examine the element; replace if needed. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for the correct oil filter for your pump.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"5\"\u003e\n\u003cli\u003eCheck the oil condition for any visible change in color or consistency. Contaminants in the oil can add to the amount of oil exhausted. Carry out a forced oil flush if contamination is discovered.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003col start=\"6\"\u003e\n\u003cli\u003eCheck pump temperature. Higher heat lessens viscosity of oil. Less viscous oil mists more than viscous oil.  \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for methods of mitigating excessive heat during pump operation.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"consult_t_2","offers":[{"title":"Default Title","offer_id":34559341257,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-sprays-oil-from-exhaust-238369472608.png?v=1779796223"},{"product_id":"pump-is-loud-noisy-1","title":"Pump is Loud\/Noisy","description":"\u003cp\u003e1- Check Vacuum Pressure.\u003c\/p\u003e\n\u003cp\u003eHigher pressure increases noise emitting from pump. If pump vacuum pressure is below 1 Torr, Locate noise source on your vacuum pump\u003c\/p\u003e\n\u003cp\u003e2- Locate area of noise, if from pump or motor side\u003c\/p\u003e\n\u003cp\u003eA) Pump side \u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003ei) Intake or exhaust lines are restricted or clogged - check both inlet and exhaust have free path of flow through hoses. Do not restrict the exhaust path to atmosphere, as restricting exhaust will create back-pressure in pump and lead to seal failure, particularly shaft seal damage.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eii)Coupling or spider coupling damage causes a squealing sound \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for parts or\u003cstrong\u003e \u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e.\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eiii) Slapping noise is typical for some pumps operating certain processes, if pump is achieving good ultimate pressure and may not indicate pump damage. \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/strong\u003e \u003c\/span\u003efor a free evaluation.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cp\u003eB) Motor side \u003c\/p\u003e\n\u003cp\u003ei) Compare the pump motor rating, printed on a label on the side of the motor and on the serial number tag, to the power source, to be sure they agree in voltage, phase, and frequency.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"consult_t_2","offers":[{"title":"Default Title","offer_id":34559360713,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-is-loud-noisy-238369374304.png?v=1779797143"},{"product_id":"pump-wont-start-2","title":"Pump Won't Start","description":"\u003cp\u003e1- Turn off the power and check the fuse and electrical connections. Compare the pump motor rating, printed on a label on the side of the motor and on the serial number tag, to the power source, to be sure they agree in voltage, phase, and frequency.\u003c\/p\u003e\n\u003cp\u003e2- System is under vacuum and vacuum from inlet or exhaust (if exhausting into house vacuum) is pulling on diaphragms stronger than motor power can move. Most diaphragm membrane pumps have small continuous run motors that cannot move diaphragms under vacuum. Bleed system to atmosphere and restart. Pump may hum or may not be audible as motor is energized. When pump motor cannot expel energy by moving diaphragms, energy builds up enough heat to trigger motor's thermal overload device and power to motor is cut off.\u003c\/p\u003e\n\u003cp\u003e3- Diaphragm is ruptured. Motor cannot moved diaphragms when at least one diaphragm is ruptured and lodged against pump head. Replace diaphragms. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for correct parts or\u003cstrong\u003e \u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e4- Exhaust is blocked or clogged - The pump will not be able to turn if exhaust gasses cannot leave the pump freely. Restrictions in exhaust, partial or full will prevent the pump from turning intermittently or completely. Try running with exhaust filter or exhaust line disconnected. Pump may not start if exhausted into another vacuum system, such as a house vacuum system.\u003c\/p\u003e\n\u003cp\u003e5- While a rare occurrence, motor bearings can be worn and seized motor. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for correct parts or \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"consult_t_3","offers":[{"title":"Default Title","offer_id":34559678857,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-won-t-start-238370095200.png?v=1779796655"},{"product_id":"pump-starts-with-insufficient-vacuum-2","title":"Pump Starts with Insufficient Vacuum","description":"\u003cp\u003e1- The primary cause of insufficient vacuum is due to system leaks. To confirm the vacuum pump is not generating sufficient vacuum, disconnect the pump from the application and test pump with a vacuum gauge. You can purchase a gauge \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/collections\/chemtech-scientific\" style=\"color: #0000ff;\"\u003ehere\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e. Or,  contact \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eChemtech Scientific\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e to evaluate your pump free of charge.\u003c\/p\u003e\n\u003cp\u003e2- Contamination\/Dirty Pump - Diaphragm pump may acquire a buildup of process emissions over time, which may glaze the internal mechanisms and wetted pump parts with residual process emissions. When insufficient vacuum is accompanied by louder operating noise, the pump's performance may be improved with cleaning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePTFE Diaphragm Pump Acetone Cleaning:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf the pump's specified ultimate vacuum is not reached anymore and the rest of the system has no leakage, the problem is often caused by stuck valve plates.\u003c\/p\u003e\n\u003cp\u003eTo clean them, proceed as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemove all connections to the pump inlet and exhaust\u003c\/li\u003e\n\u003cli\u003ePlace tubing on the exhaust of the pump to direct exhaust into a suitable container.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSwitch the pump on.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003e NOTE - \u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003eUse safety washing bottles to inject the acetone.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInject a small amount of about approx. 10 ml of acetone at once into the inlet side of the pump and wait until the pump makes the same sound as before injecting solvent.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eRepeat the injection step four to five times.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eLet the pump run for about 2 minutes and check whether the end vacuum can be reached.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eIf the pump cannot be returned to near original specifications, repeat the cleaning procedure before going on with any disassembly work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for detailed cleaning, repair and maintenance instructions with illustrations.\u003c\/p\u003e\n\u003cp\u003e3- Diaphragms are worn. Diaphragms are wear items on all diaphragm pumps. If the pump has over 5,000 hours of operation and suffers insufficient vacuum, worn membranes are the likely cause. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for detailed do it yourself repair guides for any brand of pump, or for \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e4- Failed diaphragm(s). A ruptured diaphragm will emit loud noises from the pump and be accompanied by insufficient vacuum. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for detailed do it yourself repair guides for any brand of pump, or for \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e","brand":"consult_t_3","offers":[{"title":"Default Title","offer_id":34559723337,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-starts-with-insufficient-vacuum-238369701984.png?v=1779797146"},{"product_id":"pump-is-loud-noisy-2","title":"Pump is Loud\/Noisy","description":"\u003cp\u003e1- Normally internal mechanisms compressing gasses can be heard from the inlet and exhaust of the pump. A pump will be quieter with the pump inlet connected to a process and when operating at lower pressures. Attaching a 24 inch length of thick walled gum rubber to the exhaust hose barb of a pump will mitigate much sound emitting from the exhaust of the pump.\u003c\/p\u003e\n\u003cp\u003e2- Failed diaphragm(s). A ruptured diaphragm will emit loud noises from the pump and be accompanied by insufficient vacuum. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for detailed do it yourself repair guides for any brand of pump, or for \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e3- Hoses and Gaskets - Examine hoses and gaskets visually for cracks. If cracks have developed or if the tubes and gaskets have become brittle, replace them with suitable new ones.\u003c\/p\u003e\n\u003cp\u003e4- Contamination\/Dirty Pump - Diaphragm pump may acquire a buildup of process emissions over time, which may glaze the internal mechanisms and wetted pump parts with residual process emissions. When insufficient vacuum is accompanied by louder operating noise, the pump's performance may be improved with cleaning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePTFE Diaphragm Pump Acetone Cleaning:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf the pump's specified ultimate vacuum is not reached anymore and the rest of the system has no leakage, the problem is often caused by stuck valve plates.\u003c\/p\u003e\n\u003cp\u003eTo clean them, proceed as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemove all connections to the pump inlet and exhaust\u003c\/li\u003e\n\u003cli\u003ePlace tubing on the exhaust of the pump to direct exhaust into a suitable container.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSwitch the pump on.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003e NOTE - \u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003eUse safety washing bottles to inject the acetone.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInject a small amount of about approx. 10 ml of acetone at once into the inlet side of the pump and wait until the pump makes the same sound as before injecting solvent.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eRepeat the injection step four to five times.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eLet the pump run for about 2 minutes and check whether the end vacuum can be reached.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eIf the pump cannot be returned to near original specifications, repeat the cleaning procedure before going on with any disassembly work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for detailed cleaning, repair and maintenance instructions with illustrations.","brand":"consult_t_3","offers":[{"title":"Default Title","offer_id":34559738761,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-is-loud-noisy-238369669216.png?v=1779797155"},{"product_id":"pump-wont-start-3","title":"Pump Won't Start","description":"\u003cp\u003e1-Check electrical connections, fuses or size and length of power cable. Compare the pump motor rating, printed on a label on the side of the motor and on the serial number tag, to the power source, to be sure they agree in voltage, phase, and frequency.\u003c\/p\u003e\n\u003cp\u003e2- The ambient temperature is too high\u003c\/p\u003e\n\u003cp\u003e3- Cooling air supply is insufficient\u003c\/p\u003e\n\u003cp\u003e4- Fan is not working or disconnected\u003c\/p\u003e\n\u003cp\u003e5- The process gas is to hot or throughput is too high\u003c\/p\u003e\n\u003cp\u003e6- OVERLOAD PROTECTION - Motor thermal overload protection is made available by the motor manufacturer as an aid to minimize motor failure. Overload protection is a standard feature on both 50 and 60 Hz single phase-motors. The motors have automatic overload protection. Automatic reset protection is designed to reset itself after a predetermined cooling period. If the fault to the drive remains unaltered, the motor will cycle on and off until the fault is corrected.\u003c\/p\u003e\n\u003cp\u003e7- Debris lodged in pump preventing pump from turning (may trip overload protector).\u003c\/p\u003e\n\u003cp\u003e8- Exhaust is blocked or clogged - The pump will not be able to turn if exhaust gasses cannot leave the pump freely. Restrictions in exhaust, partial or full will prevent the pump from turning intermittently or completely. Try running with exhaust filter or exhaust line disconnected. Pump may not start if exhausted into another vacuum system, such as a house vacuum system.\u003c\/p\u003e\n\u003cp\u003e9- Bad motor\u003c\/p\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e \u003c\/strong\u003efor additional trouble shooting, do-it-yourself repair assistance or to have your pump repaired by us.","brand":"consult_t_4","offers":[{"title":"Default Title","offer_id":34559837193,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-won-t-start-238370291808.png?v=1779793751"},{"product_id":"pump-starts-with-insufficient-vacuum-3","title":"Pump Starts with Insufficient Vacuum","description":"\u003cp\u003e1- Leakage, contamination, and unusual outgassing are the general causes of problems associated with poor vacuum. To operate at maximum efficiency, a system must be thoroughly clean. If the system is completely clean and free from leaks, and unwarranted vacuum problems still exist, the pump should be checked. A simple criterion for the condition of the pump is the determination of its maximum vacuum capability. This can be accomplished by blocking of the intake and reading the vacuum level on the gauge. If you pump does not have a built in gauge, a low cost relative dial gauge can be found \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/collections\/chemtech-scientific\" style=\"color: #0000ff;\"\u003ehere\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for assistance connecting gauge to evaluate pump.\u003c\/p\u003e\n\u003cp\u003e2- Worn mechanisms. Piston pumps, regardless of brand, all contain wear items. If your pump can no longer achieve sufficient vacuum after thousands of running hours, piston cup, valve and seal replacement is necessary. Please \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e with make and model of your pump for the correct service kit. Piston pump repair does not require advanced mechanical skill and is usually performed in-house.\u003c\/p\u003e\n\u003cp\u003e3- Damaged Valves. Replace flapper valves.\u003c\/p\u003e\n\u003cp\u003e4- Debris in valves. Clean debris and check for valve damage.\u003c\/p\u003e\n\u003cp\u003e5- Damaged gasket. Replace gasket\u003c\/p\u003e\n\u003cp\u003e6- Loose fitting. Tighten fitting.\u003c\/p\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for correct maintenance parts, tools and detailed instructions for do it yourself in-house repair assistance.","brand":"consult_t_4","offers":[{"title":"Default Title","offer_id":34559865993,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-starts-with-insufficient-vacuum-238370259040.png?v=1779797142"},{"product_id":"pump-is-loud-noisy-3","title":"Pump is Loud\/Noisy","description":"\u003cp\u003e1- Pumps generate more sound running at higher pressures and are at their loudest at atmospheric pressure.\u003c\/p\u003e\n\u003cp\u003e2- Piston pumps are generally the loudest of laboratory vacuum pumps. The pump should become less loud while running a process and most pumps have exhaust silencers readily available. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for the correct silencing solution.\u003c\/p\u003e\n\u003cp\u003e3- Damaged Valves. Replace flapper valves.\u003c\/p\u003e\n\u003cp\u003e4- Debris in valves. Clean debris and check for valve damage.\u003c\/p\u003e\n\u003cp\u003e5- Damaged gasket. Replace gasket\u003c\/p\u003e\n\u003cp\u003e6- Loose fitting. Tighten fitting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for correct maintenance parts, tools and detailed instructions for do it yourself in-house repair.\u003c\/p\u003e","brand":"consult_t_4","offers":[{"title":"Default Title","offer_id":34559882505,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-is-loud-noisy-238370127968.png?v=1779797136"},{"product_id":"pump-wont-start-4","title":"Pump Won't Start","description":"\u003cp\u003e1- Check electrical connections, fuses or size and length of power cable. Compare the pump motor rating, printed on a label on the side of the motor and on the serial number tag, to the power source, to be sure they agree in voltage, phase, and frequency.\u003c\/p\u003e\n\u003cp\u003e2- The ambient temperature is too high\u003c\/p\u003e\n\u003cp\u003e3- Cooling air supply is insufficient\u003c\/p\u003e\n\u003cp\u003e4- Fan is not working or disconnected\u003c\/p\u003e\n\u003cp\u003e5- The process gas is to hot or throughput is too high\u003c\/p\u003e\n\u003cp\u003e6- Motor thermal protector open (tripped)\u003c\/p\u003e\n\u003cp\u003e8- Motor is faulty\u003c\/p\u003e\n\u003cp\u003e9- Pump bearing worn - Failure to replace pump's bearings at required intervals may lead to damage of the pumping mechanisms. tip seal replacement should be performed with bearing replacement.  \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for repair parts or \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\nIf you cannot remedy your problem in-house, \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.","brand":"consult_t_5","offers":[{"title":"Default Title","offer_id":34559963273,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-won-t-start-238370455648.png?v=1779796185"},{"product_id":"pump-starts-with-insufficient-vacuum-4","title":"Pump Starts with Insufficient Vacuum","description":"\u003cp\u003eIf pump runs intermittently, the motor thermal protector is cycling open and closed. Allow the motor to cool and identify the cause of the overload.\u003c\/p\u003e\n\u003cp\u003e1- The primary cause of insufficient vacuum is due to system leaks. To confirm the vacuum pump is not generating sufficient vacuum, disconnect the pump from the application and test pump with a vacuum gauge. You can purchase a gauge \u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/collections\/chemtech-scientific\" style=\"color: #0000ff;\"\u003ehere\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e. Or,  contact \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eChemtech Scientific\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e to evaluate your pump free of charge.\u003c\/p\u003e\n\u003cp\u003e2- Tip Seal is Worn. A tip seal replacement should be carried out at anticipated intervals for critical processes, or when pump cannot achieve sufficient vacuum, due to tip seal wear. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for detailed do it yourself repair guides or for \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e3- Inlet strainer is blocked\u003c\/p\u003e\n\u003cp\u003e4- Conductance of Tubing - System tubing is too long or narrow - \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for system design and remedy.\u003c\/p\u003e\n\u003cp\u003e5- Restriction or blockage in exhaust line\u003c\/p\u003e\n\u003cp\u003e6- Contaminated\/Dirty pump.\u003c\/p\u003e\n\u003cp\u003e7- Gauge may be out of calibration.\u003c\/p\u003e\n\u003cp\u003e8- Pump may be full of water or other liquids. Flush pump with dry air or nitrogen. Install trap.\u003c\/p\u003e\nIf you cannot remedy your problem in-house, \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e \u003c\/strong\u003efor \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e","brand":"consult_t_5","offers":[{"title":"Default Title","offer_id":34559986505,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-starts-with-insufficient-vacuum-238370422880.png?v=1779793765"},{"product_id":"pump-is-loud-noisy-4","title":"Pump is Loud\/Noisy","description":"\u003cp\u003e1- Most scroll pumps emit more sound\/noise during pump down versus other vacuum pumps. If pump runs quieter at operating pressure the noise may be normal for your pump. Most scroll pumps have readily available silencer filters, which should reduce noise. \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for appropriate silencer.\u003c\/p\u003e\n\u003cp\u003e2- Hammering noise\u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eA) Pump may be overheating.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eCheck ventilation to pump and ambient temperature.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eB) Debris in pump.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eCheck intake screen. Flush Pump.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003eDisassemble pump and inspect.\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003c\/div\u003e\n\u003cp\u003e3- Humming or Grinding noise - Replace bearings, rotary seals and O-rings if the pump bearings exhibit humming or grinding noises.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e \u003c\/span\u003e\u003c\/strong\u003efor correct maintenance parts, tools and detailed instructions for do it yourself in-house repair.\u003c\/p\u003e\n\u003cp\u003eIf you cannot remedy your problem in-house, \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/contact-us\" style=\"color: #0000ff;\"\u003eContact Us\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e for\u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003e \u003ca href=\"http:\/\/www.chemtechsci.com\/pages\/pump-repair\" style=\"color: #0000ff;\"\u003eservice\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"consult_t_5","offers":[{"title":"Default Title","offer_id":34560000521,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/pump-is-loud-noisy-238370324576.png?v=1779797148"},{"product_id":"dark-contaminated-oil","title":"Dark \/ Contaminated Oil","description":"The most common cause of a loss in efficiency in a mechanical pump is contamination of oil. It is caused by condensation of vapors and by foreign particles. The undesirable condensate emulsifies with the oil which is re-circulated and subject to re-evaporation during the normal cycle of pump activity, thus reducing the ultimate vacuum attainable. Some foreign particles and vapors may form a sludge with the oil, impair sealing and lubrication and cause eventual seizure.\u003cbr\u003e\u003cbr\u003ePeriodic oil changes are necessary to maintain efficient operation of the system. The required frequency of changes will vary with the particular system. Experiences with the process will help you determine the normal period of operation before an oil change is required.","brand":"consult_t_1","offers":[{"title":"Default Title","offer_id":34816719561,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/dark-contaminated-oil-238369079392.png?v=1779796714"},{"product_id":"dark-contaminated-oil-1","title":"Dark \/ Contaminated Oil","description":"The most common cause of a loss in efficiency in a mechanical pump is contamination of oil. It is caused by condensation of vapors and by foreign particles. The undesirable condensate emulsifies with the oil which is re-circulated and subject to re-evaporation during the normal cycle of pump activity, thus reducing the ultimate vacuum attainable. Some foreign particles and vapors may form a sludge with the oil, impair sealing and lubrication and cause eventual seizure.\u003cbr\u003e\u003cbr\u003ePeriodic oil changes are necessary to maintain efficient operation of the system. The required frequency of changes will vary with the particular system. Experiences with the process will help you determine the normal period of operation before an oil change is required.\n\u003cp\u003e \u003c\/p\u003e","brand":"consult_t_2","offers":[{"title":"Default Title","offer_id":34816837321,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/products\/dark-contaminated-oil-238369341536.png?v=1779793963"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/2467\/collections\/troubleshooting-pumps-collection-6793639.png?v=1773507847","url":"https:\/\/www.chemtechsci.com\/collections\/troubleshooting_pumps_collection.oembed","provider":"Chemtech Scientific Incorporated","version":"1.0","type":"link"}