1- 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. Contact Us for appropriate silencer.
2- Hammering noise
3- Humming or Grinding noise - Replace bearings, rotary seals and O-rings if the pump bearings exhibit humming or grinding noises.
Contact Us for correct maintenance parts, tools and detailed instructions for do it yourself in-house repair.