TM 9-2320-260-34
16-34. CRANE SHIPPER, BOOM, BOOM EXTENSION, AND ROLLERS
MAINTENANCE (M819) (Contd)
j. Cleaning and Inspection
For general cleaning instructions refer to para. 2-8.
1.
For general inspection instructions, refer to para. 2-9.
2.
Inspect shipper (1) for bends, cracks, broken welds, stripped or damaged threads, and loose, broken,
3.
and damaged pins (4) and (8). Repair if damaged (subtask k.).
Inspect bushings (3) on shipper (1) for nicks, burrs, and wear (egg shaped when pivot pin (2) is
4.
inserted in bushings (3)). Replace bushings (3) if worn or damaged.
Inspect boom (7) for bends, cracks, and broken welds. Repair if damaged (subtask k.).
5.
Inspect boom extension (14) for bends, cracks, and damaged threads. Repair if damaged (subtask k.).
6.
Inspect sheaves (11) for cracks, broken cable groove edges, and worn or scored bushings (10).
7.
Replace bushings (10) if damaged or worn.
Inspect thrust washers (9) for breaks, grooves, or scoring. Replace thrust washers (9) if damaged.
8.
Inspect pins (2), (5), (12), and (13) for bends or breaks. Replace pins (2), (5), (12), and (13) if bent
9.
or broken.
10.
Inspect and repair extension cylinder (6) (para. 16-34).
Inspect roller (27) for cracks and damaged bushings (26). Replace bushings (26) if damaged.
11.
Inspect roller (24) and collars (23) for breaks, cracks, and evidence of spun bearings (30). Replace
12.
bearings (30), races (29), and collars (23) if damaged.
Inspect bearings (16) and mating races (18) for damage. Replace damaged bearings (16) and
13.
races (18) as sets.
Inspect rollers (19) for breaks, cracks, and bent or broken dowel pins (20). Replace damaged dowel
14.
pins (20).
15.
Inspect two spacer plates (21) for cracks and corrosion. Replace spacer plates (21) if cracked or
corroded.
16.
Inspect pin (25) for bends, cracks, and loose or broken plate. Replace pin (25) if damaged.
17.
Inspect shaft (22) and housing (17) for cracks, bends, and damaged threads. Repair if damaged
(subtask k.).
18.
Inspect two caps (15) and (28) for bends and cracks. Replace caps (15) and (28) if bent or cracked.
1. Repair damaged welds (TM 9-237) on shipper (l), boom (7), and boom extension (14).
2. Using arbor press, replace defective bearings (16) and (30) and races (18) and (29) as a bearing
and race set.
3. Replace bushings (3), (10), and (26) if defective.
4. Repair damaged threads (para. 2-10).
5. Replace all other parts if defective.
6. Minor scoring, nicks, or burrs may be repaired using soft stone or crocus cloth.
16-202
