HOISTS 777 SERVICE MANUAL
5-18 Published 10-01-2012, Control # 045-08
DRUM PRESSURE ROLLER ADJUSTMENT
General
Optional pressure roller assemblies are available for the
front and rear load drums.
The rollers are spring loaded to assist in maintaining proper
wire rope spooling by firmly holding the wire rope against the
drum and subsequent layers.
Adjustment
The operator must monitor drum spooling during operation.
If the wire rope jumps layers or does not wind smoothly onto
the drum, perform following steps:
1. Hold spring guide (8) wrench flats.
2. Tighten lock nut (7) to increase spring tension.
WARNING
Crush Hazard!
Rollers are spring loaded. Stop drums and turn off engine
before adjusting.
CAUTION
Avoid Machinery Damage!
Remove optional rear drum pressure roller for liftcrane
operation. Rear drum pressure roller is required for duty-
cycle applications only.
Item Description
1 Load Drum
2 Pressure Rollers
3Pivot Pin
4 Roller Frame
5 Support
6Spring
7 Lock Nut
8 Spring Guide
3
4
8
7
2
1
6
Spring Tension Forces
Rollers Against Drum
Front Load Drum Shown
Rear Load Drum Similar
A04931
5
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