Emerson Vilter VSG128, Installation, Operation And Service Manual

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5 – 19
Section 5 • Maintenance/Service
HPLD Single Screw Compressor • Installation, Operation and Service Manual • Emerson • 35391HP
Installation (Refer to Figure 5-21)
Torque values for screws:
- 110: 20 ft-lbs
- 112: 35 ft-lbs
- 113: 10 ft-lbs
- 111: 20 ft-lbs (use blue Loctite)
• The beveled side of the retaining ring (101.14) must
face away from gaterotor, see Figure 5-27.
• Make sure O-rings are placed in the proper grooves,
see Figure 5-21.
• Washer 114 has fine and coarse serrations, and those
fine serrations must be facing out. See “NORD-
LOCK Washers” on page 5-29 for more details.
13. Install gaterotor support by carefully tilting the roll-
er bearing end of the gaterotor support towards the
suction end of the compressor, see Figure 5-20. The
compressor input shaft may have to be rotated to
facilitate the installation of the gaterotor support,
see Figure 5-19.
14. When installing the ball bearing housing (102), a
new O-ring (104-1) must be used when the housing
is installed, see Figure 5-21. Lubricate the outside of
the housing and bearings with clean compressor oil
to aid in the installation. Due to the way the bear-
ings fit on the gaterotor support, the gaterotor tool
set (A25205G) must be used. Assemble the tool set
according to Figure 5-25 and 5-19 by hand tighten-
ing the bolt (109) - this will hold the gaterotor sup-
port in place. Evenly turn the jacking studs (102)
clockwise. This will push the ball bearing housing
onto the gaterotor support. Remove entire tool set.
15. Install the inner retainer (109), washers (114)
and bolts (111) using Loctite® 242 thread locker.
Tighten bolts to 20 ft-lbs.
16. Install the roller bearing housing (105) with a new
O-ring (104-3).
17. Tighten bolts (110) to 20 ft-lbs.
18. Set clearance between gaterotor blade and shelf.
19. Place a piece of 0.003”-0.004” shim stock between
gaterotor blade and shelf.
NOTE
This measurement determines the number of shims
needed for the correct clearance.
20. Measure depth from top of compressor case to top
of ball bearing housing.
21. Use factory installed shim pack (103) and ball bear-
ing housing cover (106) without the O-ring (104-2).
NOTE
Replacement blades are precisely the same
dimensionally as blades installed originally at
factory. Therefore, the same number of shims will
be required for replacement blades.
Note on tool
Make sure that gaterotor is not
in contact with the housing shelf
while installing and removing the
bearing housing assembly.
Figure 5-25. Tool To Install Bearing Housing
Assembly
See
Note on
tool