TM 9-2320-260-34
16-34. CRANE SHIPPER, BOOM, BOOM EXTENSION, AND ROLLERS
MAINTENANCE (M819) (Contd)
q. Extension Cylinder Installation
1. Attach chain and spreader bar to extension cylinder (16) and lifting device.
WARNING
Z All personnel must stand clear during lifting operations. A
swinging or shifting load may cause injury or death to personnel.
q Ensure lifting capacity is greater than weight of extension
cylinder. Failure to do so may result in injury to personnel or
damage to equipment.
NOTE
Two assistants will help with steps 2 through 4.
2. Using A-frame, aline front of extension cylinder (16) to boom (15) and walk extension cylinder (16)
into boom (15). Raise or lower lifting device as necessary to prevent extension cylinder (16) from
binding in boom (15).
3. When chain is near boom (15), support end of extension cylinder (16) with jack stand, remove
spreader bar, and connect chain to end of extension cylinder (16).
4. With holes in collar (18) alined with holes in boom (15), walk extension cylinder (16) into boom (15)
and install two pins (19) on boom (15) and collar ( 18) with four new cotter pins (17).
5. Remove chain from extension cylinder (16) and lifting device.
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