Vilter Manufacturing Compressor VSG 301

Check rack to rack clamp and rack clamp spacer clearance on all four slide valves

Check torque of socket head cap screws

Is there excessive movement between the slide valve rack shafts and the rack?

Ensure jam nuts on the end of the slide valve rack shaft are tight

Check for loose or broken roll pins in gears

Describe any excessive wear on moving parts and note parts to be replaced

Inspection of Slide Valve Assemblies

Prepare the compressor for servicing

Remove the gate rotor access covers and inspect

Remove the gate rotor support to check the clearance of the slide valve clamps

Inspect the clearance between capacity and volume slide valve clamps and slide valve carriage

Contact the factory if slide valves are worn beyond tolerances

Removal of Slide Valve Carriage Assemblies

Prepare the compressor for servicing

Determine which gate rotor support to remove

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 in gate rotor blade from the back side of the blade

Ensure the bushing is fully seated

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 up the part numbers on the inner race to the part numbers on the outer race

Press the bearing race (numbers visible) onto the gate rotor support

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

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 (446) 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.