TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 997 of 1275

SECTION Il. HATCHES, LATCHES, LOCKS, AND COVER PLATES

11-4 DRIVER’S HATCH COVER AND LOCK COMPONENTS

This task covers:

a. Removal

b. Installation

Tools

General mechanic’s tool kit (item 64, App

X

H)

Wire brush (item 6, App

X

H)

Materials/Parts

Adhesive (item 5, Appx D)

Cotter pin (item 48, App

X

G)

Dry-cleaning solvent (item 22, Appx D)

Lockspring (item 209, A

PPX

G)

Lockwire (item 30, AppX G)

Preformed packing (item 168, A

PPX

G)

Seal (item

1

19, A

PPX

G)

Sealing compound (item 57, A

PPX

D)

Spring pin (item 13, A

PPX

G)

Spring pin (2) (item 110, A

PPX

G)

Spring washer (item 193, A

PPX

G)

a. Removal

1

2

3

4

5

6

Remove six screws (1), spring pin (2), and chuck (3) from closed hatch cover assembly. Discard spring pin.

Remove Iockwire (4), two screws (5), two flat washers (6), and elevating cam (7). Discard Iockwire.

Punch out spring pin (8). Discard spring pin.

Remove elevating handle (9), shaft (10), and ball bearing (11).

Swing latch (12) away from hatch cover (13) and lift off using handles (14).

Remove three screws (15), three washers (16), three flat washers (17), and housing (18).

11-18

TM 9-2350-311-20-1