TM 9-2320-260-34-2
16-13. UPPER AND LOWER BOOM ROLLER MAINTENANCE (M816) (Contd)
NOTE
Upper and lower boom rollers are removed and installed the
q
same. This procedure covers the upper boom roller.
Assistant will help with removal task.
q
Remove six screws (1), lockwashers (2), and upper boom roller (3) from boom (4). Discard lockwashers (2).
NOTE
Measure shim thickness on each side and record for installation.
q
q Mark wheels, hub bodies, and shaft for installation.
1.
Remove eight screws (5) and lockwashers (6) from two shaft supports (7). Discard lockwashers (6).
2.
Using a brass drift and hammer, drive shaft (13) and one shaft support (7) part way out of
housing (9).
Using a mechanical puller, remove the protruding shaft support (7) and shims (8) from shaft (13)
3.
and housing (9).
4.
Repeat steps 2 and 3 to remove opposite shaft support (7) and shims (8).
Measure shims (8) as a pack. Record thickness of each side for installation.
5.
6.
Remove wheels (11) and shaft. (13) from housing (9).
Remove wheels (11) and bearings (12) from shaft (13).
7.
8.
Remove two woodruff keys (10) from shaft (13). Discard woodruff keys (10).
9.
Remove bearings (12) from wheels (11) by carefully driving a punch through holes (14) in wheels (11).
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