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Section 5 • Maintenance/Service
Compressor Replacement
Notify Vilter
prior to performing a compressor replace-
TM
ment. See Warranty instructions in Section 7.
Removal
To replace a compressor on a unit, proceed with the fol-
lowing steps:
NOTICE
Dispose of used oil in an appropriate manner following
all Local, State and Federal laws and ordinances.
1.
Shut down and isolate the compressor unit, see
Compressor Unit Isolation for Maintenance and
Service procedure.
Note location of cables to aid in installation.
2.
Disconnect all cables from sensors on compressor
and actuators.
3.
Remove coupling guard, see Coupling Guard
Replacement procedure.
4.
Remove drive coupling, see appropriate Drive
Coupling Replacement procedure.
5.
Remove center member, see Drive Coupling
Removal procedure.
Use appropriate supporting equipment to support
and keep motor, C-flange and compressor leveled.
6.
If equipped with C-flange, remove bolts securing
C-flange to compressor.
Figure 5-20. Compressor Replacement
and Hardware Assembly
(VSS 2401-3001 Shown)
5 – 30
NOTE
NOTE
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
7.
Using appropriate drain pan, drain oil by removing
drain plugs from under compressor housing and
discharge manifold. Allow oil to completely drain.
8.
Remove all oil lines from the compressor.
9.
Support suction line with appropriate supporting
equipment.
10. Remove nuts and bolts securing suction strainer/
check valve assembly to suction stop valve and
compressor.
11. Using appropriate lifting device, remove suction
strainer/check valve assembly from compressor.
12. Remove nuts and bolts securing discharge pipe to
compressor and oil separator, see Figure 5-20.
13. Remove discharge pipe and gaskets from compres-
sor and oil separator.
14. Remove nuts, flat washers, lock washers and studs
securing compressor to frame.
15. Remove any additional lines and/or components to
allow removal of compressor as required.
Refer to Bareshaft Compressor Lifting Points and
Weights section for appropriate lifting hole sizes,
weights and lifting points.
16. Install appropriate lifting eyes on top of compressor.
17. Using appropriate lifting device and additional per-
sonnel, remove compressor from frame.
Frame
NOTE
Compressor
Nut
Lock Washer
Flat Washer
Spherical
Shim
Washer
Assembly
Stud
Flat Washer
Lock Washer
Nut
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