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 733 of 775

TM 9-2350-311-10

G-3

LUBRICATION INSTRUCTIONS - CONTINUED

29.

COMMANDER’S CUPOLA COVER FLAT SPRINGS AND LATCH ASSEMBLY (C)

NOTE

Not all commander’s cupola covers contain knob latch assembly that requires lubrication.

Lubricate 12 flat springs (68) on commander’s cupola cover (69) with GAA (item 17, Appx D). Lubricate latch assembly

(69.1) at lubrication fitting (69.2) with GAA (item 17, Appx D).

30. MUZZLE BRAKE (C)

Quarterly or every 300 rounds fired, remove, clean threads, and coat unpainted surfaces of muzzle brake (70) with

GMD (item 19, Appx D) or GGP (item 18, Appx D) before reinstalling.

31. BORE EVACUATOR (C)

NOTE

Bore evacuator (11578385) has ten check balls while bore evacuator (11580776) has nine check

balls.

Quarterly or every 300 rounds fired, clean and lightly coat inside of bore evacuator (39), ten check balls (46), vent seats

(47), valve ring (45), and unpainted cannon tube (44) surfaces with GMD or GGP (item 14, Appx G).

Change 2 G-27