TM 9-2320-260-34
16-34. CRANE SHIPPER, BOOM, BOOM EXTENSION, AND ROLLERS
MAINTENANCE (M819) (Contd)
1. From rear of shipper (2), remove elbow (6), nut (7), locking plate (8), and nut (7) from center port (9)
of extension cylinder (3). Discard locking plate (8).
2. Remove elbow (5) and pipe nipple (4) from retraction port (1) of extension cylinder (3).
3. Attach chain to end of boom (10) and lifting device.
NOTE
Two assistants will help with steps 4 through 7.
4. Walk boom (10) halfway out of shipper (2). Raise or lower lifting device to prevent binding.
5. Support end of boom (10) with jack stand, and remove chain from boom (10) and lifting device.
6. Attach chain and spreader barb boom (10) and lifting device.
NOTE
Two assistants will help with steps 3 through 6.
3. Walk extension cylinder (3) out of boom (10) a distance of two-thirds length of extension cylinder (3).
16-198
