Emerson VSS, VSR, VSM 4 3 4 4, Service, Command Shaft Bearing And O-Ring Seal Reassembly

Service

C)The command shaft bearing (435) is a press fit on the command shaft (413). Remove the command shaft bearing with a suitable press.

Ven t ho le .

4 3 6

4 4 5

Reference “Parts

Section” for current

Housing

D)Remove the O-ring seal (445) from the com- mand shaft housing. The command shaft bush- ing (433 and 436) might have to be removed to gain access to o-rings. Replace bushing if the bore is deeply scored or excessively worn.

COMMAND SHAFT BEARING AND O-RING SEAL REASSEMBLY

A)Install new O-ring seal in housing and lubricate the O-ring with clean compressor oil. A vent hole is provided in the command shaft bearing housing to allow any refrigerant and oil that may leak past the O-ring seal to vent to atmosphere and not into the slide valve motor housing. Install snap ring retainer and washer on the command shaft.

B)Remove any burrs from the command shaft to prevent damage to the O-ring when assembling. Press the command shaft bearing onto the command shaft. Insert the command shaft into the housing applying pressure on outer race of bearing. Make sure the bearing is fully seated in the command shaft housing. Install the snap ring retainer in the command shaft housing.

C)Install command shaft assembly.

DISCHARGE MANIFOLD REMOVAL

A)Remove both control actuators and command shaft assemblies.

B)On VSS 451-3001 compressors, remove the dis- charge spool between the manifold and separator. Remove one bolt from each side of the discharge manifold and install (2) guide rods approximately 6” long, to support the manifold. Remove the remaining bolts (note length and location of bolts) and take off the discharge manifold.

Note: Mainfold has dowel pins to locate it on the compressor housing. Therefore, remove manifold straight back approximately 1” as not to break dowel pins.

NOTE:

When removing the discharge manifold on VSM 301-701 compressor the compressor must be properly supported to keep the compressor from moving when the manifold is removed.

C)On VSM 301-701 compressors unbolt the dis- charge flange from the discharge manifold.

D)Remove one bolt from each side of the discharge manifold and install (2) guide rods approximately 6” long, to support the manifold. Remove the remaining bolts (note length and location of bolts) and take off the discharge manifold.

77