TM 9-2320-260-34-2
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16-13. UPPER AND LOWER BOOM ROLLER MAINTENANCE (M816) (Contd)
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c. Cleaning and Inspection
1. For general cleaning instructions, refer to para. 2-8.
2. For general inspections instructions, refer to para 2-9.
1.
Press bearings (8) on shaft (9). Seat inner race of bearings (8) to shoulders of shaft (9).
Supporting outer race of bearings (8), press wheels (7) on bearings (8).
2.
NOTE
If new parts, except shims, were installed in boom roller, a new
height adjustment must be made after installation. Assemble
with woodruff keys pointing toward boom to provide maximum
clearance.
Install two new woodruff keys (6) in shaft (9).
3.
Install wheels (7) and shaft (9) in housing (5).
4.
Place two 0.25 in. (6.4 mm) dots of sealing compound on housing (5) 180 apart. Install shims (4) on
5.
housing (5) over sealing compound.
Add shims (4) as necessary, with dots of sealing compound in between, until thickness recorded
6.
during disassembly is equalled. Do not apply sealing compound to outermost shims (4).
NOTE
Assistant will help with steps 7 through 10,
7.
Press two shafts supports (3) onto shaft (9).
Turn housing (5) over on arbor press and place support under lower end of shaft (9). Ensure shaft
8.
supports (3) and shims (4) are tight against housing (5).
When second shaft support (3) is seated on shims (4), measure gaps (10) between shaft supports (3)
9.
and wheels (7).
a. If gaps (10) are 0.030-0.180 in. (0.76-4.57 mm), go to step 10.
b. If gaps (10) are less than 0.030 in. (0.76 mm), remove shaft supports (3), add shim(s) (4), and
install shaft supports (3). Measure gaps (10) and go to step 10 if correct.
c. If gaps (10) are greater than 0.180 in. (4.57 mm), remove shaft supports (3), remove shim(s) (4),
and install shaft supports (3). Measure gaps (10) and go to step 10 if correct.
When gaps (10) are correct, aline index marks on shaft supports (3) with marks on housing (5) and
10.
install with sixteen new lockwashere (2) and screws (1).
16-78
