For accurate servicing, refer to these standard specifications for various HSA models: McQuay HSA Screw Compressor Training | PDF | Valve - Scribd
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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. For accurate servicing
If the compressor loads unwantedly or fails to hold capacity, remove the coils from the unload (A) mcquay hsa screw compressor service manual best