Manitowoc MLC650 Service Maintenance Manual

Reference Only
HOISTS MLC650 SERVICE/MAINTENANCE MANUAL
5-72
Published 09-09-16, Control # 229-09
PRESSURE ROLLER
Overview
The pressure roller is a protective device that prevents the
wire rope from jumping wraps on the corresponding drum or
from jumping off the corresponding drum.
Drum 3
See Figure 5-40 for the following procedures.
Weekly Maintenance
1. Watch the pressure rollers (2) while paying out and
hauling in the wire rope on the drum (1). The springs (3)
must hold the pressure rollers snugly against all layers
of wire rope on the drum—from the first layer to the last
layer.
2. If necessary, increase the tension of the springs by
tightening the lock nut (7a).
Spring Replacement
1. Attach lifting slings from a hoist to the pressure roller
assembly. The pressure roller assembly weighs 123,7
kg (272.73 lb).
2. Remove the spring load from the pressure roller by
tightening the lock nuts (7b) against the plates (11).
3. Remove the cotter pins (5 and 9). Remove the pins (6
and 10) and the washers (8).
4. Remove the pressure roller assembly from the drum
assembly.
5. Unload the springs by loosening and removing the lock
nuts (7b).
6. Remove the spring retainer bars (4).
7. Remove the old springs (3) and replace with new
springs.
8. Install the spring retainer bars.
CAUTION
Prevent Wire Rope Damage!
If equipped, make sure the pressure roller springs are
tight enough to hold the rollers snugly against all layers of
wire rope on the drum—from the first layer to the last
layer.
Item Description
1Drum
2 Pressure Roller
3Spring
4 Spring Retainer Bar
5 Cotter Pin
6Pin
7a Lock Nut
7b Lock Nut
8Washer
9 Cotter Pin
10 Pin
11 Plate
12 Pressure Roller Arm
View A
FIGURE 5-40
View B
View C
Roller Acting on
Barrel
Roller Acting on
Rope Layer
Dim. B = 14 mm
Dim. A
= 290 mm
Marks

Manitowoc MLC650 Specifications

General

Brand	Manitowoc
Model	MLC650
Category	Construction Equipment
Language	English