5 – 50
Section 5 • Maintenance/Service
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Gaterotor Disassembly (All VSS & VSM
Compressors Except VSM 97-127
Compressors)
10. To perform gaterotor disassembly, remove gatero-
tor from compressor, see Gaterotor Assembly
Replacement procedure (All VSS-VSM Compressors
Except VSM 301-701 Compressors) or Gaterotor
Assembly procedure (VSM 301-701 Compressors
ONLY).
Gaterotor Blade Removal
11. Remove the snap ring and washer from the gatero-
tor assembly. Lift gaterotor blade assembly off the
gaterotor support, see Figure 5-50.
12. Check damper pin and bushing for excessive wear.
Replace if required.
Figure 5-49. Gaterotor and Shelf Clearance
Check for 0.003-0.004” (0.076- 0.102 mm) clearance
between gaterotor blade and partition.
Figure 5-50. Gaterotor Blade Assembly
7. Check the clearance between the entire gatero-
tor blade and the shelf, rotate the gaterotor
to nd the tightest spot. It should be between
0.003-0.004“ (0.076-0.102 mm). Make ad-
justments, if necessary. It is preferable to shim
the gaterotor blade looser rather than tighter
against the shelf, see Figure 5-49.
8. After clearance has been set install a new O-ring
on bearing housing cover, install cover and tight-
en the bolts to the recommended torque value.
9. Install side cover with a new gasket. Tighten the
bolts to the recommended torque value. The
unit can then be evacuated and leak checked.
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