TM 9-2320-280-20-3
Change 1
11-159
11-113. TURRET BEARING MAINTENANCE (Cont'd)
b. Cleaning and Inspection
1.
Remove two seals (7) from grooves (8) in bearing assembly (3). Discard seals (7).
2.
Remove old sealant from grooves (8) and surface of races (9) on bearing assembly (3).
3.
Using high pressure water or steam directed between races (9), clean ball bearings (10) in bearing
assembly (3) with mild detergent.
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi
(207 kPa). Use only with effective chip guarding and personal
protective equipment (goggles/shield, gloves, etc.).
4.
Using compressed air, blow out moisture from ball bearings (10) in bearing assembly (3).
5.
Place and rotate bearing assembly (3) on a flat surface, and ensure it rotates freely with a maximum
of 6 lb pull on the outer race (9).
6.
If bearing assembly (3) does not rotate freely, send bearing assembly (3) to direct support maintenance.
7.
If bearing assembly (3) rotates freely, proceed to step 8.
8.
Cut an 11-foot piece of seal (7).
NOTE
• Stretch seal during installation to ensure seal is fully installed
in groove.
• The broad side of new seal fits into the groove.
• Ensure sealant is not used on ball bearings or races.
9.
Place bearing assembly (3) on a flat surface, apply sealant into groove (8), and install seal (7).
10.
Apply sealant to ends of seal (7) on bearing assembly (3).
NOTE
Allow to dry approximately 15 minutes before handling bearing assembly.
11.
Turn bearing assembly (3) over, apply sealant into groove (8), and install second seal (7).
12.
Apply sealant to ends of seal (7) on bearing assembly (3).
NOTE
Allow to dry one hour before installation.
