REFRIGERATION DIVISION
V SERIES
SCREW COMPRESSOR HANDLING MANUAL
Supersedes all previous version. This information is for reference use only and subject to change without notice
Revision 2 (June 05,2000) Page 47 of 61
Fig. 97A Unloader Cylinder and Blind Cover Fig. 97B
d) Tighten the bolts securing the blind cover and unloader cylinder to the suction cover (5).
Fig. 98 Unloader Cylinder (60)
e) Screw and eye bolt into the unloader piston (64) and manipulate to confirm smooth movement
of the slide valve (54).
4.8 Unloader Cover (74)
When the shaft seal portion of the indicator cylinder cam (77) has been disassembled, assembly work
is carried out according to Fig.100.
a) Fit the ball bearing (78) on the cylinder cam shaft. When pushing the bearing onto the shaft,
apply pressure on the inner race of the bearing only, otherwise the bearing may be damaged.
Push the bearing onto the stepped portion of the cylinder cam and fix with the stop ring (79).
b) Apply a generous coating of oil to the V-ring (82) and fit the V-ring on the cover side,
positioning the top of the “V” of the ring to face the inside and the bottom of the “V” to face the
outside.
c) Fit the spring (83) and the spring retainer (84) and mount the shaft of the cylinder cam
assembled in a) above on the V-ring (82). Fasten the bearing (78) with the bearing gland (80).
No. Name No. Name
74 Unloader cover 80 Bearing gland, cylinder cam
75 O-ring, unloader cover / unloader cylinder 81 Hex-head socket cap screw, bearing gland
76 Hex-head socket cap screw, unloader
cover
82 Teflon V-ring, cylinder cam
77 Cylinder cam, unloader indicator 83 Spring, cylinder cam
78 Ball bearing, cylinder cam 84 Spring retainer, cylinder cam
79 Stop ring, cylinder cam ball bearing
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