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 954 of 1275

TM 9-2350-311-20-1

NOTE

Fabricate an adapter to pull pivot pin by welding a 1-in. NC thread nut to head of a

7/8-in, NF thread bolt, 2 in. (5.1 cm) long (item 2, Appx E). Use with puller when

required.

3 Remove screw (4), flat washer (5), pivot pin (6), and adjuster (7).

4 Remove two screws (8) and mounting bracket (9).

5 Remove bleed plug (1), bleed plug body (1 O), and input pressure fitting (1 1).

b. Disassembly

1 Remove two bearings (12).

2 Remove nut (13), scraper (1 4), and preformed packing (15). Discard packing.

3 Remove piston (16), two retainers (17), and preformed packing (18) from cylinder (1 9). Discard packing.

c. Assembly

1 Install retainer (1 7), new preformed packing (1 8), retainer (17), and piston (16) in cylinder (1 9).

2 Install new preformed packing (15) and scraper (14) on nut (13).

3 Install nut(13) over piston (16). Torque nut to 180-220 Ib-ft (244-298 NŽm).

4 Install two bearings (12).

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