Shaft Seal Installation - For Part# 28985W And 28985Wa - Emerson VILTER VSS Installation, Operation And Service Manual

Section 5 • Maintenance/Service
Shaft Seal Installation – For Part# 28985W and
28985WA
(see Table 5-9 and Figure 5-44)
Follow the "Prior to Shaft Seal Installation" steps
before starting this procedure.
WARNING
Follow local lock-out/tag-out procedure. Compressors
must be depressurized before attempting to do any
work on them. Failure to comply may result in serious
injury, death and/or damage to equipment.
Care must be taken when handling the cup assembly
and mating ring when installing. See Figure 5-40 for
Handling Seal Face with Care.
Suggestion
A spray bottle filled with clean compressor oil may be
used to lubricate the faces of the seals without touching
the seal.
CAUTION
Do not wipe or touch the face of the mating ring
(219C) where the face meets the carbon component
of the stationary assembly (219B).
1. Install a new oil seal (230) in seal housing (218).
2. Ensure compressor shaft is clean and free from
marks and scratches.
3. Remove seal rotating face (301A) and O-ring
(301B) from rotating assembly portion of the seal
(assembly 219C).
4. Apply clean compressor lubricating oil to seal
281 218
230
Figure 5-44. Shaft Seal Breakdown (
5 – 40
VSS/VSR/VSM/VSH/VSSH Compressor • Installation, Operation and Service Manual • Emerson • 35391S
NOTE
NOTE
219B
306 305 304
Stationary
Face
seating area on the compressor shaft and inside
area of rotating face support (301C).
5. Gently assemble the rotating face support (301C)
onto main compressor shaft, taking care to align
the drive pin in the main shaft with the keyway on
the rotating face support (301C).
6. Using a small amount of Flowserve supplied grease,
carefully re-assemble O-ring (301B) and rotating
face (301A) over the compressor shaft, onto the
rotating face support (301C).
7. Moving onto the stationary portion of the seal
(219B), gently press the stationary face (305), into
the seal housing (218) ensuring it is fully seated.
Make sure to align the hole on the back of the sta-
tionary face (305) with the Anti-rotation pin (306)
in the seal housing (218). See Figure 5-46.
8. Assemble retaining ring (304) over the seal into
the shaft seal housing (218), aligning the mount-
ing holes with the threaded holes in the shaft seal
housing.
9. Apply blue Loctite 242 to the bolts (303) and tight-
en them down evenly in a star pattern until snug,
then torqueing each to 48 in-lbs (6 N-m).
10. Apply clean compressor lubricating oil to both seal
faces (305 and 219C).
11. Ensure a new O-ring (260) is installed in proper
groove of shaft seal housing (218).
12. Carefully assemble shaft seal housing (218) onto
main compressor shaft into main compressor hous-
ing, evenly tightening the bolts (281) and torque-
ing to their appropriate value as specified by com-
pressor specific drawing.
13. Install the coupling and coupling guard. The unit
can then be evacuated and leak checked.
219C
301A 301B
303 260
Rotating
Face
28985W and 28985WA Only
301C
Shaft
)