Reference
Only
HOISTS
999 SERVICE/MAINTENANCE MANUAL
5-2
Published 05-16-17, Control # 233-03
Overhaul
To overhaul either clutch/brake assembly, proceed as
follows:
for the following procedure.
1.
Lower all loads to ground and stop engine.
2.
Remove machinery cab door from left side of crane
(retained with three pins)
.
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
released.
12.
Remove cover from clutch/brake assembly.
13.
The unit can now be disassembled and repaired as
required.
See Free Fall Drum Brake Assembly drawing at the end
of this Section.
•
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
Free Fall Drum Brake Assembly drawing.
15.
Reinstall clutch/brake assembly on crane. Reverse
steps
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 (200 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) as shown in
•
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
until clutch/brake assembly is
supported with slings from assist crane.
Clutch/brake assembly may fall off mounting adapter.
Содержание 999
Страница 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Страница 2: ...R e f e r e n c e O n l y ...
Страница 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Страница 173: ...R e f e r e n c e O n l y Manitowoc Published 05 16 17 Control 233 03 4 19 999 SERVICE MAINTENANCE MANUAL BOOM 4 ...
Страница 174: ...R e f e r e n c e O n l y BOOM 999 SERVICE MAINTENANCE MANUAL 4 20 Published 05 16 17 Control 233 03 ...
Страница 297: ...R e f e r e n c e O n l y ...
Страница 298: ...R e f e r e n c e O n l y ...