Manitowoc 16000 User Manual

Reference Only
Manitowoc Published 05-03-17, Control # 228-03 5-1
16000 SERVICE/MAINTENANCE MANUAL HOISTS
5
SECTION 5
HOISTS
BOOM/MAST HOIST PAWL
See Figure 5-1 for the following procedure.
The boom/mast hoist (Drum 4) has a drum pawl which is a
positive locking device. When engaged, the pawl prevents
the boom/mast hoist drum from turning in the down direction.
The pawl (2) is controlled by the Drum 4 park switch in the
operator cab:
• When park is turned on, the pawl engages. The
hydraulic cylinder (3) extends and spring force (6)
rotates the pawl into engagement with the ratchet (1).
• When park is turned off, the pawl disengages. The
hydraulic cylinder retracts, and the cam (5) 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
boom/mast hoist is in use.
If necessary, adjust the eye bolt 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. There must be enough spring tension to pull
the pawl into the root of a ratchet tooth if the drum starts to
turn in the down direction.
FIGURE 5-1
A10767
View from Right Side
of Crane
4
3
5
1
2
2
6
Item Description
1Ratchet
2Pawl
3 Hydraulic Cylinder
4Eye Bolt
5Cam
6Spring

Manitowoc 16000 Specifications

General

Brand	Manitowoc
Model	16000
Category	Construction Equipment
Language	English