Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 5-19
2250 SERVICE/MAINTENANCE MANUAL HOISTS
5
When reassembling a clutch band, match the numbers
stamped on each end of the band segments with the number
stamped on the connecting plates for proper assembly.
Clutch Cylinder Overhaul
Cylinder Removal
See Figure 5-14 for the following procedure.
1. Read precautionary steps given after Inspection and
Adjustment heading.
2. Remove guard covering brake flange and clutch
assembly.
To remove guard, it will be necessary to remove nuts
retaining brake band supports.
3. Rotate clutch cylinder to its most accessible position.
4. Release clutch (see procedure in Table 5-1
)
5. Support rod end of cylinder and remove rod end pin.
6. Stand clear of cylinder and apply clutch (cylinder rod will
retract). See procedure in Table 5-1
.
7. Disconnect air line from end of cylinder.
8. Remove head end pin and remove cylinder from crane.
Cylinder weighs approximately 70 lb (32 kg).
Cylinder Disassembly
See Figure 5-15 for the following procedure.
1. Remove four socket head cap screws 5/16 in (8 mm).
2. Working in a crisscross manner, alternately loosen nuts
on threaded rods until bonnet is removed from cylinder.
Make sure threaded rods do not back out when
loosening nuts.
3. Disassemble cylinder using Figure 5-15
as a guide.
Cylinder Assembly
See Figure 5-15 for the following procedure.
1. Apply Loctite No. 271 to threads of threaded rods and
install them in tapped holes marked “X”.
2. Apply Loctite No. 242 to exposed threads of threaded
rods and to threads of socket head cap screws.
3. Lubricate all parts with a light coat of air cylinder grease.
4. Assemble cylinder and observe following precautions:
a. Piston rod must be flush with back edge of piston.
b. Packing cup must be snug against back side of
piston.
c. Vent hole in bonnet must be positioned 180° from air
inlet hole in cylinder.
5. Align holes in bonnet with threaded rods and install nuts.
6. Working in a crisscross manner, alternately tighten nuts
on threaded rods until bonnet flange is tight against
cylinder flange.
7. Securely install four socket head cap screws.
8. Apply Loctite No. 242 to threads of rod end and jam nut
and assemble them to piston rod as shown in
Figure 5-14
, View B. Securely tighten jam nut.
Cylinder Installation
See Figure 5-14 for the following procedure.
1. Pin cylinder to clutch spider so air inlet port is toward
outside. Be sure to install cotter pin.
2. Connect air line to cylinder.
3. Block cylinder in position.
4. Stand clear of clutch and release clutch. Cylinder rod
will extend. See Table 5-1
for procedure.
5. Pin cylinder rod to clutch lever. Be sure to install cotter
pin.
6. Apply clutch (see Table 5-1
for procedure).
7. Adjust clutch.
8. Install guard over drum flange and clutch assembly.
9. Adjust brake band supports to provide proper drum to
lining clearance.
CAUTION
Component Assembly!
Do not mix band segments from one drum with those from
another drum. Always keep band segments in a matched
set, or assembly will be difficult.
WARNING
Personal Injury Hazard!
Clutch cylinder is spring loaded. Disassemble cylinder
according to following instructions, otherwise, cylinder will
fly apart with dangerous force.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English