Emerson VSG & VSSG Specifications download pdf (Page 61)

C) The command shaft bearing (435) is a press

t on the command shaft (413). Remove the

command shaft bearing with a suitable press.

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 gas 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.

Reference “Parts

Section” for current

Housing

436

445

Vent hole.

Service

DISCHARGE MANIFOLD REMOVAL

A) Remove both control actuators and command

shaft assemblies.

B) On VSG751-2101 and VSSG 291-601 compres-

sors, remove the discharge 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 VSG 301-701

compressor the compressor must be properly supported

to keep the compressor from moving when the manifold

is removed.

C) On VSG 301-701 compressors unbolt the dis-

charge ange 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.

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Emerson VSG & VSSG Specifications Page 61

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