89
Service
B)
Remove the hex head cap screws (452) from
the cover (418) for the slide valve control
motor, and remove cover. Mark and discon-
nect the wires to the slide valve control motor
and potentiometer (425). Remove the two hex
bolts (453) under the mounting plate (415) that
hold the motor bracket (405) in place. The
motor can now be removed.
C)
Removes the four socket head cap screws
(455) securing the motor plate and command
shaft assembly. The motor plate and com-
mand shaft assembly can now be removed
from the discharge manifold.
D) Repeat the above steps to remove the oppo-
site slide valve control motor and command
shaft assembly.
4.32
INSTALLATION OF RETROFIT
CONTROL ASSEMBLY
A) Install the new command shaft assembly with
a new O-ring on the manifold. Make sure the
command shaft coupling is engaged in the
cross shaft gear. Rotate the bearing housing
so the vent holes points down, to prevent
water and dust from entering the vent.
B)
Install the new motor plate (415) and the four
socket head cap screws (457), and Nord-
Lock
®
washers (477) securing it. Tighten the
bolts to the recommended torque value.
C)
Install the drive key (427) in the command
shaft keyway.
D) Install the new style optical gear motor as
outlined in section 4.02 Optical Slide Valve
Actuator Installation.
E)
Refer to the appropriate Microprocessor op-
erating manual for the procedure to recalibrate
the actuator. The unit can now be evacuated
and leak checked as outlined in section 0.03.
4.33
COMMAND SHAFT BEARING
AND O-RING SEAL REPLACEMENT
FOR RETROFIT CONTROL AS-
SEMBLIES
A) Remove command shaft assembly as outlined
in section 4.05.
B)
With a suitable pin punch, drive out roll pins
(490) and (491). Remove coupling (414) from
the command shaft and dress out any burrs
around the roll pin hole on the command shaft.
C)
Remove snap ring retainer (451) from com-
mand shaft housing (412). Push the com-
mand shaft assembly out of the housing.
Summary of Contents for VSM 71-701
Page 1: ...1 VPN 35391S February 2006 Rev 05 Price 60 00...
Page 2: ...2...
Page 20: ...20...
Page 52: ...53 Pre Start Up Check List...
Page 99: ...99 Recommended Spare Parts List...
Page 104: ...104 Gate Rotor...
Page 110: ...110 Main Rotor VSS...
Page 112: ...112 Main Rotor VSR...
Page 114: ...114 Slide Valve Cross Shafts and End Plate...
Page 118: ...118 Capacity Slide Volume Slide Carriage Assembly Slide Valve Carriage Assembly...
Page 134: ...134 Miscellaneous Frame Components VSS Screw Compressor VSR Mini Screw Compressor...
Page 138: ...138 C FlangeAdapter Components 630 620 610 640 601 641 630 601 620 610 640 641 642 650 651...
Page 140: ...140 Replacement Parts Tools...
Page 144: ...144 GaterotorAssembly...
Page 148: ...148 Main Rotor Slide Valve Cross Shafts and End Plate Models 71 401 Only Counter clockwise...
Page 152: ...152 Main Rotor Slide Valve Cross Shafts and End Plate Model 501 701 Only Clockwise...
Page 154: ...154 Volume Ratio Capacity Slide Carriage Assembly Slide Valve Carriage Assembly...
Page 158: ...158 Miscellaneous Frame Components Model VSM 501 701 Model VSM 71 401...
Page 160: ...160 Replacement Parts Accessories Housing Accessories C Flange Assembly...
Page 166: ...166 Haight Pumps...
Page 170: ...3 Refrigerating Specialties Division...
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Page 237: ......
Page 238: ......
Page 243: ......
Page 244: ...168...