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Section 5 • Maintenance/Service
Shaft Seal Installation
(see Table 5-6 and Figure 5-33)
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 5-32 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.
Apply clean compressor lubricating oil to inside
area of spring holder (219.8), rotating Silicon car-
bide piece (219.6) and o-ring (219.7).
2.
Carefully fit spring holder (219.8) onto shaft until
it is fully seated against shoulder on compressor
shaft. Be sure to align slot in spring holder (219.8)
with drive pin on compressor shaft, see Figure 5-36.
HPLD Single Screw Compressor • Installation, Operation and Service Manual • Emerson • 35391HP
NOTE
NOTE
Figure 5-33. Shaft Seal Breakdown
CAUTION
Ensure the spring holder (219.8) is fully seated against
the shoulder of the compressor shaft. If the spring
holder (219.8) is not fully seated against the shoulder,
the carbon component of the stationary assembly
(219B) will be damaged when the shaft seal housing
(218) is installed.
3.
Place O-ring (219.7) inside rotating silicon carbide
piece (219.6) and carefully assemble onto shaft.
You should feel some resistance in sliding this onto
the shaft shoulder.
4.
Install a new oil seal (230) in seal housing (218).
5.
If necessary, Install anti-rotation pin (219.1a) in
hole in shaft seal housing (218).
6.
Install O-ring (219.2) into shaft seal housing.
7.
Install stationary silicon carbide piece (219.3) in
shaft seal housing with anti-rotation pin (219.1b)
aligned 180 degrees away from the pin (219.1a)
in step 4. You should feel some resistance to fit the
stationary piece into the O-ring.
8.
Fit the retainer (219.4) over the stationary piece
while aligning the slots on the anti-rotation pins.
9.
Install retaining ring (219.5) into groove in shaft
seal housing.
10. Install a new O-ring (260) on the seal housing (218),
making sure the O-ring is placed in the O-ring
groove and not the oil gallery groove. Lubricate
both seal faces with clean compressor lubricating
oil.
11. Carefully install the seal housing (218) on the com-
pressor shaft, evenly tightening the bolts (281) to
the recommended torque values (36 ft-lbs.).
12. Install the coupling and coupling guard. The unit
can then be evacuated and leak checked.
5 – 27
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