TM-9-2350-311-10

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

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 461 of 775

TM 9-2350-311-10

3-6 ARMAMENT AND CAB MAINTENANCE - CONTINUED

3-6.8

Breech Mechanism

a. Disassembly

NOTE

While disassembling breech mechanism,

ensure that cam is not raised against

M118A2/M118A3 elbow telescope.

1

With firing group block (1) in center position, push firing mechanism (2) into firing group block and rotate

clockwise to remove.

Only remove rack springs when breechblock is in closed position. Rack springs are under heavy

pressure and could cause injury to personnel. Under no circumstances will removal of rack

springs be attempted with breechblock open.

2

Depress plunger (3) with punch and slide rack plate (4) rearward until rack plate disengages from

plunger.

Change 2

3-58.3/(3-58.4 blank)