TM 9-2320-260-34
16-34. CRANE SHIPPER, BOOM, BOOM EXTENSION, AND ROLLERS
MAINTENANCE (M819) (Cont'd)
b. Boom Extension Removal
1. Remove two Iinch pins (11) and two pins (10) from boom extension (1) and boom (12),
2. Attach chain to boom extension (1) and lifting device. Take up slack in chain.
NOTE
Two assistants will help with steps 3 through 7.
3. Using lifting device attached to A-frame, raise or lower boom extension (1) while walking boom
extension (1) out of boom (12) to expose eight feet of boom extension (1).
4. Place jack stand under boom extension (1) and remove chain from boom extension (1).
5. Attach chain and spreader bar to center of balance of boom extension (1).
All personnel must stand clear during lifting operations.
A swinging or shifting load may cause injury to personnel.
Ensure lifting capacity is greater than weight of boom extension.
Failure to do so may result in injury to personnel or damage to
equipment.
6. Continue raising or lowering lifting device while removing boom extension (1) from boom (12).
7. Set boom extension (1) on wood blocks and remove chain and spreader bar from boom
extension (1) and lifting device.
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