REFRIGERATION DIVISION
V SERIES
SCREW COMPRESSOR HANDLING MANUAL
3.4.7.2 Inspection
Inspect the parallel pin to be sure it is not bent. Also inspect the gasket, Vi changing rod O-rings (450,
451) and thrust washer (449) and replace if any abnormality is found.
3.4.8 Thrust Bearing (38)
The thrust bearing is one of the most important components of the screw compressor. Maximum
compressor performance depends on proper installation and adjustment of the thrust bearing
otherwise operation problems may result. For this reason, maximum care should be taken when
disassembling and reassembling the bearing.
The thrust bearing used on V-Series compressors is an angular type face-to-face duplex bearing with
special retainer of high accuracy. This bearing receives thrust load only as the outer race is clearance
fitted.
The bearing plays an important role in determining the clearance between the discharge end face of
the rotor and the bearing head.
3.4.8.1 Disassembly
a) Straighten the lock washer (46) claws on the bolts (45) securing the thrust bearing washer (43)
and remove the bolts. Support the bearing gland (41) by hand when removing the last bolt so
that it does not fall down.
b) Straighten the claws on the lock washer (40) for the lock nut (39) that secures the inner race of
the thrust bearing to the shaft then loosen and remove the nut.
A thin steel lining plate (237) is provided between the lock nut (39) and the washer (40).
Handle the lining plate carefully and store in a safe place. A thrust washer is also provided
between the lock washer and the inner race.
Fig. 51 Bearing Gland Bolt (45) and Lock Washer (46) Fig. 52 After Thrust Bearing Gland Removed
c) The thrust bearing inner race and the shaft are clearance fitted.
Insert a î1a2 mm wire with a flat bent point into the clearance between the outer race and the
bearing step (41), hook the bearing step and remove the bearing.
Supersedes all previous version. This information is for reference use only and subject to change without notice
Revision 2 (June 05,2000) Page 32 of 61
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