Vilter Manufacturing Compressor VSG 151

Prepare the compressor for servicing as outlined in section REMOVAL (All VSG)

Remove bolts (281) holding the shaft seal cover (218) and use threaded jacking holes to assist in removing the cover

Check for oil drainage as the cover is removed

Remove the rotating portion of the shaft seal (219C)

Remove oil seal (230) from cover

Remove the stationary portion of the shaft seal (219B) from the seal cover using a brass drift and hammer

Gate Rotor Roller Bearing Removal

Refer to section REMOVAL (All VSG)

Remove the snap ring (131) retaining the roller bearing in the bearing housing

Remove the roller bearing (125) from the bearing housing (112)

Use a bearing puller to remove the roller bearing race (125) from the gate rotor support (110)

Gate Rotor Roller Bearing Installation

Match part numbers on the inner race to the outer race and press the bearing race onto the gate rotor support

Install the outer bearing into the bearing housing ensuring numbers match the inner race

Install the snap ring retainer in the housing with the bevel facing away from the roller bearing

Prepare the compressor for servicing.

Follow the appropriate instructions to remove control actuator.

Remove components securing mounting plate to manifold

Remove the command shaft and mounting plate from the compressor.

Command Shaft Assembly Installation

Install the command shaft assembly with a new o-ring on the manifold.

Ensure the command shaft tongue is engaged in the cross shaft slot.

Rotate the bearing housing so the vent holes point down.

Ensure the unit is shut down and de-pressurized

Remove the coupling guard and center member from the coupling

Attach a dial indicator to the compressor frame and zero the indicator

Measure the movement when pushing the coupling towards the motor

Measure the movement when pushing the input shaft towards the compressor

Calculate the total indicator movement

Remove the snap ring and washer from the gate rotor assembly

Lift gate rotor blade assembly off the gate rotor support

Check damper pin and bushing for excessive wear

Replace damper pin and bushing if necessary

Install damper pin bushing (120) in gate rotor blade (111) from the back side of the blade

Ensure the bushing is fully seated