Emerson Vilter VSS - C) Gaterotor Backlash Inspection

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Section 5 • Maintenance/Service
VSS/VSR/VSM/VSH/VSSH Compressor • Installation, Operation and Service Manual • Emerson • 35391S
C) Gaterotor Backlash Inspection
Gaterotor Backlash is the clearance between the gatero-
tor teeth width and the main rotor groove.
Follow these steps to perform the gaterotor backlash
inspection:
1. The Gaterotor should be aligned so that a tooth in
the rotor is perpendicular to the Main Axis as shown
in Figure 5-16. The tooth should be in the center
axis of the housing.
2. A dial indicator with magnetic base can be used
(Vilter part numbers 9994ARE or 9994ARJ for
the dial indicator, and 9994ARD for the magnetic
base). See Figure 5-17 for location.
Figure 5-15. Gaterotor Float
Figure 5-16. Alignment of Gaterotor
Inside Tooth is Perpendicular to the Rotor
Figure 5-17. Location of Dial Indicator Magnetic Base
Gaterotor Support
Gaterotor
Shelf
Location for Dial Indicator
Magnetic Base