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 305 of 775

TM 9-2350-311-10

2–12 PREPARATION FOR FIRING — CONTINUED

2-12.5

Loading the 155MM Cannon — Continued

b. Power Ramming — Continued

6 Hearing last digit of quadrant reading, cannoneer no. 1 rotates cylinder assembly (12) up to latch

position to keep projectile from falling back until last digit of quadrant, display of quadrant, or chief of

section signals to ram.

• Before actuating control lever on rammer assembly actuating valve, be sure power pack

assembly pressure gage indicates at least 925 psi (6378 kPa) for proper seating of

projectiles. Improperly seated projectile can cause short rounds and injury to personnel.

• Be sure to hold actuating valve forward for a full four seconds to properly seat projectile.

Improperly seated projectiles cause short rounds and injury to personnel.

7

Cannoneer no. 1 reaches up to actuating valve (15) on cab ceiling, pushes control lever (16) forward,

and holds control lever for 4 seconds to allow full extension of cylinder assembly (12) rod and proper

seating of projectile. After projectile is seated, cannoneer no. 1 releases control lever.

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