Alliance Laundry Systems BU170S Service Manual Page 51

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70422201R1
49
Adjustments
32.Drive Belt Tension
Refer to Figure 7.
NOTE: If cylinder belts will be adjusted, service
them before drive belt.
120 Pound Models:
NOTE: Belt tension from step pulley to cylinder
shaft pulley can be measured to ensure proper
installation in one of the following ways:
Belt Tension Gauge initial reading
70-80 pounds.
Force to deflect belt .38 inch at midspan with
initial tensioning 6.5 pounds.
Belt Tension Gauge reading after run 55-65
pounds.
170 and 200 Pound Models:
NOTE: Belt tension from cylinder drive motor
pulley to step pulley can be measured to ensure
proper installation in one of the following ways:
Belt Tension Gauge initial reading 60-70 pounds.
Force to deflect belt .38 inch at midspan with
initial tensioning 6.0 pounds.
Belt Tension Gauge reading after run 45-55
pounds.
a. Support corner drive guard and remove screws
holding corner guard to rear of tumbler.
b. Support drive guard cover and remove screws
holding guard to rear of tumbler.
c. Reinstall drive guard.
d. Loosen the two motor bracket pivot screws.
Refer to Figure 7.
e. Turn the adjusting nuts clockwise until proper
tension is reached. Refer to Figure 7.
f. Retighten all nuts and screws.
Figure 7
TMB1787S
Rear
Bearing Mounting
Screw
Rear
Bearing Assembly
Collar
Front
Bearing Assembly
Collar
Front
Adjusting
Screw
Rear
Adjusting
Screw
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