TM-9-2350-261-34

CARRIER, M113A2, M577A2, M1064, M1068, M1059 AND M901A1

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

TM-9-2350-261-34 - Page 321 of 785

TM 9-2350-261-34

REPAIR COMMANDER’S CUPOLA (M113A2, M1059, AND M1064 ONLY) — Continued

0040 00

ASSEMBLY

NOTE

If one ball bearing or separator needs to be replaced, all ball bearings and separators must

be replaced.

1.

Install inner race (8) on hatch (4).

CAUTION

Improper installation will cause binding, resulting in bearing failure. Bearing block (7) radius

surface must face toward cupola center.

Do not use talcum or other powder to reduce friction. When talcum is exposed to moisture, a

chalky substance will form, causing binding.

NOTE

Alternately, install 24 separators (6) and 23 ball bearings (5) between bearing blocks (7). One

separator (6) is to be installed on each side of each bearing block (7). A maximum number of

sets (one ball and one spacer per set) is needed between any two blocks. The number of sets in

each space between blocks must not differ by more than one set.

2.

Install 140 ball bearings (5), 146 separators (6), and six bearing blocks (7) in groove of inner race (8).

NOTE

The outer race and inner race must be aligned correctly so that the traverse lock pin will fit.

3.

Install outer race (3) on hatch (4). Place large unthreaded hole in outer race (3) directly above largest unthreaded hole in

inner race (8).

4.

Secure outer race (3) to inner race (8) with 18 new lockwashers (2) and socket head screws (1). TIGHTEN SCREWS

TO 25-34 LB-FT (34-46 N·M) TORQUE. Use torque wrench.

FOLLOW-THROUGH STEPS

1.

Install commander’s cupola (WP 0039 00).

END OF TASK

0040 00-2