For new units, replace the oil filter after the first 500 hours. For regular operation, every 1,500 to 2,000 hours is standard. Troubleshooting Common Issues When the unit isn't performing, the MicroTech II controller
or Stargate frames) is known for its single-screw design, which uses gaterotors to balance radial and axial loads mcquay hsa screw compressor service manual best
If you hear a "rumble" or "whine" during unload cycles, the angular contact bearings are failing. For new units, replace the oil filter after
The HSA’s male and female rotors are timed by gears. If you remove the rotors for bearing replacement and don’t follow the exact timing mark alignment procedure, the rotors will clash. The result: catastrophic seizure on start-up. The HSA’s male and female rotors are timed by gears
Before any service:
The "best" service manual for you will depend on whether you are dealing with a slide valve for capacity control (unloading) or a fixed displacement unit.