TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 1337 of 1563

TM 9-2815-220-24

STARTER DRIVE MECHANISM REPAIR

0157 00

DISASSEMBLY

1. Press spur gear shaft (7) from bearing housing (16), using an arbor press (item 8, WP 0176).

2. Remove plain encased seal (19) from bearing housing (16).

Discard seal.

3. Check bearing (20) on each end of gear shaft (7).

a. Look for broken, cracked or split rings, cracked, broken or loose separators, heat

discoloration (brown-blue or blue-black color).

Rotate the free race slowly and feel for

roughness.

If any of these conditions exists, the bearing must be replaced.

b. If either bearing needs replacement, go to step 4.

If both bearings are OK, go to step 5.

CAUTION

Because the force used to press the bearing from the gear is through

the individual balls and not the race, the bearing is destroyed when it

is removed.

Do not use bearing once it has been pressed from the

gear.

4. Press ball bearings (20) from spur gear shaft (7) using an arbor press.

WARNING

Retaining rings are spring loaded.

5. Remove retaining ring (21) from idler spur gear (9).

Discard retaining ring.

6. Using an arbor press, remove ball bearing (22) from spur gear (9).

21

9

22

19

16

20

7

20

WP 0157 00-5