Manitowoc 999 Service And Maintenance Manual

Reference Only
Manitowoc Published 05-16-17, Control # 233-03 5-5
999 SERVICE/MAINTENANCE MANUAL HOISTS
5
Drum Pressure Roller
Adjustment
See Figure 5-2 for the following procedure
Optional drum pressure roller assemblies (13) are available
for 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.
The operator must monitor drum spooling during operation.
If the wire rope jumps layers or does not wind smoothly into
the drum, perform following steps:
1. With either roller contacting drum barrel, adjust spring
(14) to an overall length of 13 in (330 mm).
This ensures correct initial tension on drum.
NOTE: The drum pressure roller is intended to be used
with one layer of rope only. It is permissible to store
up to three layers of rope on drums. Spooling of
more than three layers of rope on drum requires
removal of roller.
3 to 4 Wraps of
Wire Rope Remaining
on Load Drum
FIGURE 5-3
Bare
Drum
1-5/8 in
(41 mm)
Lagged
Drum
1-3/8 in
(35 mm)
Auxiliary
Load Drum
A1081
Lever
Jam Nut
Adjusting
Screw
Limit Switch
Roller
Turn Adjusting Screw
Out to Open Switch
Eyebolt
Return
Spring
Cap Screw
Bail Limit
Rollers
Bail Limit
Limit
WARNING
Crush Hazard!
Rollers are spring-loaded. Before adjusting, stop drums
and turn off engine.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English