Manitowoc 2250 Service And Maintenance Manual

Reference Only
HOISTS 2250 SERVICE/MAINTENANCE MANUAL
5-22
Published 11-06-15, Control # 040-13
Inspection and Adjustment
See Figure 5-17 for the following procedure.
NOTE: Make sure air system pressure is 120 to 132 psi
(8,3 to 9,1 bar) at all times during inspection and
adjustment procedure.
1. Lower bucket to ground. Pay out enough wire rope so
drums can be operated without hoisting bucket.
2. Select RIGHT rear drum if not already done.
3. Note air pressure indicated on pressure gauge in right
rear console and turn off pressure regulator.
4. Select STANDARD mode and confirm.
5. Remove cover over access hole at clutch.
6. To position right rear drum clutch parts in access hole for
inspection and adjustment steps, proceed as follows:
a. Stand clear of clutch while right rear drum is
turning.
b. Move rear drum handle in either direction from off to
turn clutch and drum.
c. Release rear drum handle to off to stop clutch and
drum when desired part is accessible through
access hole.
Adjuster, signal operator when to stop drum.
7. Position live end of clutch band in access hole and
inspect lining wear.
The clutch lining is 3/8 in (10 mm) thick when new.
Replace the lining before its thickness is less than 1/4 in
(6 mm) or drum will be scored by lining rivets.
8. Inspect all pins and linkage for excessive wear and
replace parts as required. Excessively worn pins and
linkage will make it difficult to properly adjust clutches.
Lubricate clutch linkage according to lubrication in
Section 9 of this manual.
9. Rotate rear drum clutch so cylinder rod is in access hole.
If Mark A is flush with end of cylinder, no further
adjustment is required. Proceed to step 10
.
10. If Mark A is not flush with end of cylinder, proceed with
remaining steps 10a
through 10f, 11, and 12.
a. Rotate rear drum clutch so adjusting nut and jam nut
are in access hole.
b. Loosen jam nut several turns.
c. Release rear drum clutch — pull front drum handle
back until front drum just starts to turn and stop (this
releases rear drum clutch).
d. Tighten adjusting nut as required. Turning adjusting
nut one flat will move cylinder rod and Mark A
approximately 9/16 in (14 mm).
e. Repeat steps 9
and 10a through 10d until Mark A is
flush with end of cylinder.
f. Repeat step 10a
and securely tighten jam nut to
lock adjustment.
CAUTION
Moving Machinery Hazard!
It is necessary to rotate load drum and apply/release drum
clutch during inspection, adjustment, and overhaul steps.
Drum clutch inspection, adjustment, and overhaul require
two people: one to operate drum controls and one to
perform inspection, adjustment, and overhaul steps.
Maintain constant communication between adjuster and
operator so drum is not operated while adjuster is in
contact with parts.
Lower load block or weight ball onto ground so wire rope
is slack on drum being serviced.
• Adjuster stay clear of all moving parts while load drum
and clutch are being operated.
• Operator do not operate drum controls until adjuster
is clear of moving parts.
FIGURE 5-18
1/4in
(6 mm)
Mark A
3 in
(76 mm)
Cylinder
Rod
Mark B
A1114
WARNING
Falling Load Hazard!
Only use Manitowoc original equipment lining. Other
lining may not provide proper clutch torque. Clutch could
slip, allowing load to drop.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English