HOISTS 14000 SERVICE MANUAL
5-2
Published 09-05-14, Control # 226-02
Overhaul
See Figure 5-1 for following procedure.
To overhaul either clutch/brake assembly, proceed as
follows:
1. Lower all loads to ground and stop engine.
2. Open machinery enclosure door on right side of crane.
3. Disconnect hydraulic lines from clutch/brake ports.
Catch oil leakage from hoses and ports in a container as
hoses are disconnected.
4. Securely attach slings from assist crane to clutch/brake
assembly.
The assembly has four tapped holes—two in top of unit
and two in cover—to which lifting eyes can be threaded
(3/4 inch-10 UNC threads).
The assembly weighs 1,650 lb. (748 kg).
5. Remove eighteen socket head cap screws (7) and
remove Clutch/brake assembly from crane.
Do not loosen or remove hex head cap screws (1 – 6)
until clutch/brake assembly is removed from crane.
6. Drain oil from clutch/brake assembly. A plug is provided
in bottom of unit.
7. Place clutch/brake assembly on a workbench and
securely block it with shaft pointing down.
8. Remove wire from hex head cap screws (1 – 6).
9. Loosen cap screws (1, 3, and 5) two full turns.
10. Loosen cap screws (2, 4, and 6) two full turns.
11. Repeat steps 9
and 10 until all spring preload is
released.
12. Remove cover clutch/brake assembly.
13. The unit can now be disassembled and repaired as
required. (See Brake Assembly—Free Fall drawing.)
• Reverse the assembly steps to disassemble the
clutch/brake assembly.
• Read and perform all steps on the assembly
drawing.
• Replace all seals any time the unit is disassembled
to replace brake discs.
14. Reassemble clutch/brake assembly as instructed in
Brake Assembly—Free Fall drawing.
15. Reinstall clutch/brake assembly on crane. Reverse
steps 2
– 5 above.
• For proper mounting orientation, see Drum Shaft
Assembly drawing at the end of this Section.
• Once the splines in the shaft are engaged with the
drum planetary, it may be necessary to rotate the
clutch/brake assembly to align mounting holes.
Apply up to 3,000 psi (207 bar) hydraulic pressure
with a portable pump to the brake release port in
bottom of unit. The assembly can then be rotated by
hand to align mounting holes.
16. Test clutch/brake assembly for proper operation with
free fall on and off:
• With brake applied, check distance between ring on
wear indicator and edge of indicator housing. It
should be approximately 9/32 in (7 mm).
Clutch/brake must hold rated load of 29,500 lb. (13,381 kg)
single line pull, both while hoisting load and while holding
load in position with brake applied.
DANGER
Flying Object Hazard
Brake springs are preloaded. Clutch/brake assembly can
fly apart with dangerous force.
To prevent death or serious injury, read following
instructions before disassembling clutch/brake.
WARNING
Falling Load Hazard
Do not perform step 5 until clutch/brake assembly is
supported with slings from assist crane.
Clutch/brake assembly may fall off mounting adapter.
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