Vilter Manufacturing Compressor Unit VSS180

Compressor Shaft Bearing Clearance Inspections

Check that all necessary tools and equipment are in place

Ensure force applied does not exceed 300 to 500 lbs at point of contact

Determine Maximum Applied Force

Main Rotor Bearing Axial Clearance Inspection

Remove center member as per Drive Coupling Replacement procedure

Install and zero dial indicator on compressor frame

Record measurement after pushing coupling towards motor

Record measurement after pushing input shaft towards compressor

Shut down and isolate compressor unit

Remove components securing the command shaft assembly

Remove the command shaft and mounting plate from the compressor

Install a new o-ring (446) into the groove on the compressor discharge manifold

Apply clean compressor lubricating oil on the o-ring

Install the command shaft onto the compressor discharge manifold

Check all pressure and temperature readings

Check micronic oil filter inlet and outlet pressures for excessive pressure drop

Is the pressure drop across the micronic oil filter greater than 45 psi?

Clean strainers each time filter cartridge is replaced

Check compressor sound for abnormal noises

Check shaft seals for excessive oil leakage

Is the oil leakage from shaft seals within the normal range (6 to 15 drops per hour)?

Ensure all required parts are available

Select the type of heater cartridge

Remove heater cartridge from thermowell

Heater Cartridges with Turck connectors

Open any other valves that may trap liquids to prevent serious injury and/or damage to equipment.

Follow local lock-out/tag-out procedure.

Ensure compressors are depressurized before attempting to do any work on them.

Removal of Type C Sure-Flex Coupling

Shut down the compressor unit, refer to Stopping/Restarting procedure in Section 4.

Turn disconnect switches to the OFF position for the compressor unit and oil pump motor starter, if equipped.

Allow compressor, motor and surrounding components to cool prior to servicing.