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Section 5 • Maintenance/Service
new O-ring (142) must be used when the housing
is installed, see Figure 5-42. Lubricate the outside
of the housing and bearings with clean compres-
sor oil to aid in the installation. Due to the fit of the
bearings on the gaterotor shaft, the thrust bearing
removal and installation tool with the pusher shoe
must be used. Turn the jacking screw clockwise.
This will push the thrust bearings onto the shaft
and push the housing assembly into the frame.
Install the inner retainer (115) and bolts (151) us-
ing Loctite® 242 thread locker. Tighten bolts, see
Appendix A.
19. Set clearance between gaterotor blade and shelf.
20. Place a piece of 0.003"-0.004" shim stock between
gaterotor blade and shelf.
This measurement determines the amount of shims
needed for the correct clearance.
21. Measure depth from top of compressor case to top
of thrust bearing housing.
22. Use factory installed shim pack (106) and bearing
housing cover (116) without the O-ring (143).
Replacement blades are precisely the same
dimensionally as blades installed originally at
factory: Therefore, the same amount of shims will
be required for replacement blades.
5 – 44
NOTE
NOTE
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Figure 5-41. Gaterotor Assembly Removal
Use flats provided on
gaterotor support to
prevent rotation when
removing bearing
retainer.
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