Manitowoc MLC165-1 Service Maintenance Manual

Reference Only
Manitowoc Published 05-26-17, Control # 238-02 5-45
MLC165-1 SERVICE/MAINTENANCE MANUAL HOISTS
5
5
PRESSURE ROLLER (DRUM 1 AND 2)
The OPTIONAL pressure roller is a protective device which
prevents the wire rope from jumping wraps on the
corresponding drum (Drum 1 or 2) or from jumping off the
corresponding drum.
Pressure Roller (Drum 2)
See Figure 5-30 for the following instructions.
Observe the pressure roller daily for proper operation.
1. Watch the pressure rollers (2) while paying out and
hauling in the wire rope on the rear drum (1).
The springs (4) must hold the pressure rollers (2) 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 (4) by
tightening the eyebolts (5).
Pressure Roller (Drum 1)
See Figure 5-31 for the following instructions.
Daily Maintenance
NOTE The springs (3) for the front drum pressure rollers
(2) are not adjustable.
1. Watch the pressure rollers (2, View A) while paying out
and hauling in the wire rope on the front drum (1).
The springs (3) must hold the pressure rollers (2) snugly
against all layers of wire rope on the drum — from the
first layer to the last layer.
2. Replace the springs (3) if they lose tension.
Spring Replacement
1. Land the load on the drum and stop the engine.
2. Remove the compression rods (7) from storage (View
A).
3. Assemble the compression rods (7) in the caging
position (View B).
4. Tighten the hex nuts (7c), alternating from side to side,
until the springs (3) are compressed and the pressure
rollers (2) are pulled away from the wire rope on the
drum.
5. Attach lifting slings from a hoist to the pressure roller
assembly. It weighs 90 lb (41 kg).
6. Remove the screws (5, View A) and lift the pressure
roller assembly away from the drum (1).
7. Loosen the hex nuts (7c), alternating from side to side,
until the pre-load of springs (3) is fully released.
8. Disassemble the pressure roller assembly as needed to
replace parts.
9. Reassemble the pressure roller assembly.
10. Assemble the compression rods (7) in the caging
position (View B).
11. Tighten the hex nuts (7c), alternating from side to side,
until the springs (3) are compressed.
12. Attach lifting slings from a hoist to the pressure roller
assembly. It weighs 90 lb (41 kg).
13. Lift the pressure roller assembly into position at the
mounting plates (4, View A).
14.
Apply Loctite
®
243 to the threads of the cap screws (5).
15. Install the cap screws (5) with flat washers to attach the
pressure roller bracket (6) to the mounting plates (4).
If necessary, tighten the hex nuts (7c), alternating from
side to side, to further compress the springs (3).
16. Torque cap screws (5) to 80 ft-lb (110 Nm).
17. Fully loosen hex huts (7c), alternating from side to side.
18. Remove the compression rods (7) from the caging
position (View B).
19. Store the compression rods (7, View A).
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.
WARNING
Flying Object Hazard
The pressure roller springs for the front drum are pre-
loaded.
Do not attempt to remove the front drum pressure roller
assembly until the springs are compressed.
Parts will fly apart with violent force if this precaution is
ignored.

Manitowoc MLC165-1 Specifications

General

Brand	Manitowoc
Model	MLC165-1
Category	Construction Equipment
Language	English