Manitowoc 18000 Service Maintenance Manual

Reference Only
Manitowoc Published 12-05-17, Control # 035-23 5-3
18000 SERIVCE/MAINTENANCE MANUAL HOISTS
5
MAST HOIST PAWL MAINTENANCE
General
The mast hoist (Drum 5) has a drum pawl which is a positive
locking device. When engaged, the pawl prevents the mast
hoist drum from turning in the down direction.
The pawl is controlled by Drum 5 (mast hoist) park switch in
the operator’s cab:
• When park is turned ON, the pawl engages. The
hydraulic cylinder extends and spring force rotates the
pawl into engagement with the ratchet.
• When park is turned OFF, the pawl disengages. The
hydraulic cylinder retracts, and the cam rotates to
disengage the pawl from the ratchet.
It may be necessary to hoist slightly to fully disengage
the pawl from the ratchet.
Maintenance
The only maintenance required is to visually check the pawl
for proper operation. This should be done daily when the
mast hoist is in use.
If necessary, adjust the eye bolts so the spring has sufficient
tension to fully engage the pawl with the ratchet.
In some cases, the pawl may come to rest on the top of a
ratchet tooth. Spring tension must be sufficient enough to
pull the pawl into the root of a ratchet tooth if the drum starts
to turn in the down direction.
FIGURE 5-2
View from Right Side
of Crane
Item Description
1Ratchet
2Pawl
3 Hydraulic Cylinder
4Eye Bolt
5Cam
6Spring
18CSM5-102
4
3
6
5
1
2

Manitowoc 18000 Specifications

General

Brand	Manitowoc
Model	18000
Category	Construction Equipment
Language	English