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Section 5 • Maintenance/Service
Compressor Shaft Seal Replacement - For
VSS/VSM Units
Tools
Table 5-15. Shaft Seal Tool Kits
Model
VSM 97 - VSM 127
VSM 152 - VSM 401
VSM 501 - 701
VSS 291 - 601
VSS 751 - 1301
VSS 1551 - 2101
Removal
1.
Remove bolts (281) securing shaft seal housing
(218). to compressor.
There will be a small amount of oil drainage as the
shaft seal housing is removed.
2.
Insert two of bolts (281) into threaded jacking
holes to assist in removing shaft seal housing (218).
3.
Remove mating ring (219C) from compressor shaft.
4.
Remove oil seal (230) from shaft seal housing (218).
5.
Using a brass drift and hammer, tap out cup as-
sembly (219B) from the back side of shaft seal
housing (218).
6.
Remove O-ring (260).
Installation
CAUTION
Care must be taken when handling the cup assembly
and mating ring when installing. See Figure 5-59
for handling seal faces with care. Do not touch the
carbon component of the cup assembly or mirror face
on the mating ring as body oil and sweat will cause
corrosion.
On VSS 291 - 601 compressors equipped with an
Anti-rotation pin in the shaft seal housing, when
replacing the cup assembly (219B) the Anti-rotation
pin in the housing must be removed. See Figure
5 – 56
(VPN) for the Shaft Seal
Tool Kits
N/A
25455A
25455B
25455B
25455C
25455D
NOTE
NOTE
5-61.
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Suggestion
A spray bottle filled with clean compressor oil may be
used to lubricate the faces of the seals without touching
the seal.
7.
Install a new oil seal (230) in seal housing (218).
8.
To install the carbon cartridge part of the seal in the
seal housing: clean inside shaft seal housing (218)
where cup assembly (219B) meets inside shaft seal
housing.
9.
If applicable, remove protective plastic from cup
assembly (219B). DO NOT wipe or touch carbon
component of cup assembly.
10. If carbon component of cup assembly (219B) needs
cleaning, use alcohol and a lint-free cloth to clean.
11. Apply clean compressor lubricating oil to O-ring on
cup assembly (219B).
12. Using shaft seal tool or similar, install cup assembly
(219B) in shaft seal housing (218). If applicable,
align the hole on the back of the carbon cartridge
with the Anti-rotation pin in the seal housing. See
Figure 5-61.
13. Clean compressor shaft and shaft seal cavity in
compressor housing.
14. Apply clean compressor lubricating oil to mating
ring (219C) seating area on compressor shaft. See
Figure 5-61.
15. Apply clean compressor lubricating oil to inside
area of mating ring (219C).
IMPORTANT
DO NOT wipe or touch the face of the mating
ring (219C) where face meets the carbon
component of the cup assembly (219B).
281
218
230
Figure 5-60. Compressor Shaft Seal Assembly
219
260
219B
219C
Mirror Face
Carbon Component
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Troubleshooting
