Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 5-25
2250 SERVICE/MAINTENANCE MANUAL HOISTS
5
DRUM PAWL ADJUSTMENT
General
This section applies only to the ratchet and pawl provided on
the 73 in (1,9 m) wide front and rear drums.
The pawl limit switches must be properly adjusted to ensure
proper operation of the drums.
When either pawl is engaged, the corresponding limit switch
closes the electric circuit to the crane’s programmable
controller. This action prevents the corresponding drum from
being operated in the lower direction.
When either pawl is disengaged, the corresponding limit
switch opens the electric circuit to the programmable
controller. This action allows the corresponding drum to be
operated in the lower direction.
If the operator attempts to operate either drum in the lower
direction with the corresponding pawl engaged, the
OPERATING LIMIT alert will come on and PAWL IN will
appear on the digital display.
The pawl limit switches are factory set and do not require
periodic adjustment. Either limit switch must be adjusted if
parts are replaced and checked if the corresponding drum is
not operating properly.
Limit Switch Adjustment
1. Loosen screw so limit switch lever is free to rotate on
shaft.
2. Disengage corresponding drum pawl. It may be
necessary to hoist slightly before the pawl will disengage
the ratchet.
3. Rotate lever and hold it so roller is against pawl.
4. Turn limit switch shaft, not the lever, counterclockwise
until limit switch clicks open and hold.
5. Make sure roller is against pawl and securely tighten
screw in lever to lock adjustment.
6. Check for proper operation:
• Engage pawl and try to operate drum. Drum should
not operate in lower direction.
• Disengage pawl and try to operate drum. Drum
should operate in lower direction.
7. Readjust limit switch if required.
Return Spring
Adjust the eyebolt so the return spring has enough tension to
fully engage and hold the pawl against the ratchet.
A03999
Item Description
1 Boom Butt Wire Rope Guide
2 Sensor Junction Box
3 Transmitter
4Receiver
5 Adjusting Screws and Brackets
1
2
3
4
5
FIGURE 5-20
CAUTION
Moving Parts Hazard!
To make adjustments, engine must be running and drums
and pawl must be operated.
Avoid injury from moving machinery. Stay clear of drum
and pawl while either is being operated.
Maintain constant communication between operator and
adjuster so drum and pawl are not operated while adjuster
is in contact with parts.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English