Vilter VSM 71-701, Operation And Service Manual

Page: 73 / 244

73
Service
2.00 INPUT SHAFT SEAL
REPLACEMENT
There are two types of shaft seals that have been
used interchangeably in the Vilter VSS and VSR
Single Screw Compressors. The first type has a
stationary mirror face and rotating carbon. The
second type has a stationary carbon and a rotat-
ing mirror face. Either type of seal may be used
in the compressors. On Vilter VSM compressors
the type of seal utilized has a stationary carbon
and a rotating mirror face.
2.01 INPUT SHAFT SEAL REMOVAL
A) Prepare the compressor for servicing as out-
lined in section 0.01.
B) Remove bolts (281) holding the shaft seal
cover (218). Insert two of the bolts into the
threaded jacking holes to assist in removing
the cover. There will be a small amount of
oil drainage as the cover is removed.
C) Remove the rotating portion of the shaft seal
(219C).
D) Remove oil seal (230) from cover.
E) Remove the stationary portion of the shaft
seal (219B) from the seal cover using a brass
drift and hammer to tap it out from the back
side of the seal cover.
230 218 265 260
219B
219C
219A 281
230 218 265 260 219B
219C
219A 281
Roll pin # 265 only used
on VSS 751 and larger.
Seal with stationary mirror face (219B) and
rotating carbon face (219C).
Used till mid 1995. on VSG non c-flange
compressors.
Seal with stationary carbon face (219B) and
rotating mirror face (219C).
Current Shaft Seal and for all Replace-
ment.