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 TM 10-3930-660-24-1
BOOM HOIST CYLINDERS REPLACEMENT - CONTINUED
0201 00
REMOVAL
CAUTION
Wipe the area clean around all hydraulic connections to be opened during removal. Cap lines and plug open-
ings after removing lines. Contamination of the hydraulic system could result in premature failure.
NOTE
If more than one hydraulic line is to be removed, identify lines to ensure proper installation. Use suitable
container to catch any hydraulic oil that may drain from system.
1.
Start engine (TM 10-3930-660-10).
2.
Raise boom so boom hoist cylinder upper pivot pins
(1) are above cab.
1
3
4
2
409-791
3.
Stop engine (TM 10-3930-660-10).
WARNING
Use caution when handling heavy parts. Provide adequate support and use assistance during procedure. Ensure
that any lifting device used is in good condition and of suitable load capacity. Keep clear of heavy parts sup-
ported only by lifting device. Failure to follow this warning may cause injury or death.
Be sure boom is supported with lifting device before upper pivot pins are removed. Failure to support boom
during removal of upper pivot pins could result in personal injury or death.
NOTE
Combined weight of boom and MLRS attachment is 6,300 lb (2858 kg). Weight of boom is approximately
4,100 lb (1860 kg).
4.
Support boom with lifting device.
5.
Place wood block under cylinder and behind cab on vehicle deck to support cylinder (2) when it is lowered.
6.
Place wood block under rod eye of cylinder (2) to prevent accidental damage to cylinder rod eye during removal.
7.
Use lifting device to support cylinder (2) to be removed.
8.
Remove locknut (3), screw (4) and pivot pin (1) using pin puller. Discard locknut.
NOTE
If removing one cylinder, have assistant signal operator when cylinder is fully retracted.
If removing both cylinders at the same time, note that one cylinder will fully retract before other cylinder
begins to retract. Have assistant signal operator when both cylinders are fully retracted.
9.
Start engine and run at full throttle (TM 10-3930-660-10).
0201 00-2
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