Principales generadores de demanda estadística

a. Unloading Spent (Fired) Cartridge. WARNING

Do not place hand behind breech until tube has reached its fuel recoil and has started to go back into battery.

(1) Cannoneer no. 1 positions his or her hand behind breech mechanism access opening to receive spent cartridge case (1).

(2) Assistant gunner opens breech mechanism to eject cartridge case (1) by rotating breech operating lever (2) to rear.

2-30. UNLOADING HOWITZER (cont)

a. Unloading Spent (Fired) Cartridge. (cont) (3) Cannoneer no. 1 grasps rear of cartridge

case (1) and removes it by pulling it straight out from breech mechanism. (4) Cannoneer no. 1 inspects breech

mechanism and cannon tube and announces, BORE CLEAR, if there are no obstructions or foreign materials observed.

(5) Assistant gunner closes breech mechanism if another round is not going to be loaded.

b. Unloading Spent (Fired) Cartridge with Rammer Extractor Tool.

(1) Remove cartridge case (1) by using rammer extractor tool (2). Install rammer extractor tool so that lips of fork (3) fit between cannon tube and rim of spent cartridge case, and pry it out of chamber. (2) If cartridge case (1) cannot be extracted

with rammer extractor tool (2), insert cleaning section staff through muzzle end of the cannon tube and tap bottom of cartridge case until it is loosened and can be removed.

(3) Notify Unit maintenance to check cartridge extractor.

c. Unloading an Unfired Round. WARNING

A complete round, once loaded, should be fired. A cook off could result, causing injury or death to personnel.

For unloading an unfired round, refer to misfire/checkfire procedures. (Refer to page 4-33.)

2-31. PREPARATION FOR TRAVEL (MARCH ORDER) (Cont) a. Procedure 1.

(1) Chief of section, upon receipt of a movement order, issues march order command for the section and supervises work of all members of the section throughout all sequences of preparation and checks to make sure respirator is properly set for travel.

(2) Gunner aids ammunition team chief in locking cradle lock strut assembly (1) after weapon is placed in center of traverse. Gunner withdraws left trail locking pin (2) from forward hole (firing position) and inserts it into rear hole (traveling position).

(3) Assistant gunner performs the following:

(a) Inspects chamber (3) to be sure that gun is not loaded.

(b) Closes breech mechanism (4) after inspection by chief of section.

(c) Closes covers on fire control quadrant vials (5).

(d) Aids ammunition team chief in locking cradle lock strut assembly (1) by operating elevating handwheel.

2-31. PREPARATION FOR TRAVEL (MARCH ORDER) (cont) a. Procedure 1. (cont)

(e) Withdraws right trail locking pin (6) from forward hole (firing position) and inserts it in rear hole (traveling position).

(f) Picks up overall cover from right of gun and places it over cradle.

(g) Moves to right trail.

(4) Cannoneer no. 1 moves to his or her position at left trail, prepared to aid in closing it.

(5) Assistant gunner picks up muzzle plug (7), and, after cannon tube has been inspected by chief of section and found cleared, fastens muzzle plug (7) on muzzle (8).

(6) Cannoneer no. 2 moves to his or her position at right trail, prepared to aid in closing it.

(7) Ammunition team chief releases left handbrake (9) to raise and secure bottom shield. Assistant gunner releases right handbrake (10) to raise and secure bottom shield.

(8) Ammunition team chief inserts handspike, if required, in its socket in rear of left trail, and moves to his or her position at left trail, prepared to aid in closing it.

(9) Driver maneuvers prime mover into position as directed by chief of section

b. Procedure 2.

(1) Gunner places overall cover (1) over muzzle and drapes remainder of overall cover over cradle (2) and breech mechanism.

(2) Assistant gunner, aided by cannoneer no. 2, closes right trail when ammunition team chief calls, CLOSE, and verifies that two end pieces on travel lock shaft (3) fit into travel lock brackets (4). (3) Cannoneer no. 1, using handspike for leverage and

aided by ammunition team chief, closes left trail when ammunition team chief calls, CLOSE.

(4) Cannoneer no. 2, using drawbar for leverage and aided by assistant gunner, closes right trail when ammunition team chief calls, CLOSE.

(5) When ammunition team chief sees that gunner and assistant gunner have finished fitting overall cover over travel lock shaft, ammunition team chief calls, CLOSE, to assistant gunner, cannoneers no. 1 and 2, and gunner, to indicate that trails may be closed.

c. Procedure 3.

(1) Gunner removes M19 instrument light (1) by loosening two wingnuts (2), removing M19 instrument light (1) from pantel (3), and tightening two wingnuts (2).

(2) Gunner sets rotating head and deflection of pantel at zero, closes covers on M21A1 telescope mount level vials, removes pantel (3) from M21A1 telescope mount, places it in case (4), and locks the case.

(3) Assistant gunner removes M36 instrument light (5) by removing lamp (6) from elbow telescope (7), loosening clamp (8) on M23 telescope mount (9), and removing M36 instrument light (5).

(4) Assistant gunner removes elbow telescope (7), if mounted, and places it in case (4).

2-31. PREPARATION FOR TRAVEL (MARCH Order) (cont) c. Procedure 3. (cont)

(5) Cannoneer no. 1 locks trail locking latch (10) after trails are closed.

(6) Cannoneer no. 2 disengages drawbar locking shaft (11), rotates drawbar (12) 180 degrees to the downward position, and reengages drawbar locking shaft.

(7) Ammunition team chief locks left axle in traveling position by rotating left axle lock (13) 180 degrees outward toward wheel and engages left axle lock in outer hole.

(8) Assistant gunner locks right axle in traveling position by rotating right axle lock (14) 180 degrees outward toward wheel and engages right axle lock in outer hole.

(9) Ammunition team chief removes handspike (15), if used, fastens it in its carrying socket on left trail, picks up wire from executive officer’s control station, and power supply and cable assembly to the remote control light source.

d. Procedure 4.

(1) Chief of section performs a check of trail lock assembly (1), travel lock (2), and handbrakes (3).

(2) Chief of section makes sure that M21A1 telescope mount (4) and M4A1 fire control quadrant (5) are in an upright, level position.

(3) Gunner fits and fastens breech mechanism end of overall cover (6).

2-31. PREPARATION FOR TRAVEL (MARCH ORDER) (cont) d. Procedure 4. (cont)

(4) Cannoneer no. 1 disassembles cleaning section staff, removes rammer extractor tool and places it in the section chest, and fastens sections of the cleaning section staff in their brackets on left trail.

(5) Cannoneer no. 2 prepares and loads ammunition and equipment on prime mover, aided by other members of the section.

e. Procedure 5.

(1) Gunner aids chief of section in supervising the march order. (2) Cannoneers no. 1 and 2 and ammunition team chief prepare

ammunition and equipment for loading on prime mover.

(3) Cannoneer no. 2 retrieves and disassembles the M1A2 aiming posts (1), places them in their cover (2), and fastens them in their brackets on the right trail (3). Cannoneer no. 2 also prepares M1A1 collimator (4) for travel.

f. Procedure 6.

(1) Chief of section directs maneuvering of prime mover until pintle is just short of drawbar (1).

(2) Assistant gunner grasps right trail handrail (2). (3) Cannoneer no. 1 grasps left trail handrail (3). (4) Cannoneer no. 2 grasps right trail handrail (2).

(5) Ammunition team chief releases left handbrake (4). (6) Ammunition team chief grasps left trail handrail (3).

(7) Driver positions prime mover as directed by chief of section so that drawbar (1) is over pintle (5).

g. Procedure 7.

(1) While ammunition team chief places his or her weight on cannon tube (1), assistant gunner and cannoneers no. 1 and 2 raise trails (2).

(2) Assistant gunner and cannoneers no. 1 and 2 lower drawbar (3) on pintle (4). Cannoneer no. 2 latches and secures pintle (4) by installing safety release pin (5) into pintle (4).

2-31. PREPARATION FOR TRAVEL (MARCH ORDER) (Cont) h. Procedure 8.

(1) Cannoneer no. 2 installs the taillight assembly on the cannon tube and tightens the pin.

(2) Gunner connects taillight assembly to prime mover. i. Procedure 9.

(1) All crewmembers of the section take their posts (except chief of section) and board prime mover on the chief of section’s command, MOUNT.

(2) Driver raises and fastens tailgate, fastens safety strap, and boards cab of prime mover.

(3) Chief of section verifies that: (a) Handbrakes (1) are released. (b) Taillight assembly is connected. (c) Pintle (2) is latched and locked.

(d) Equipment and crewmembers are aboard and secure.

(e) Tailgate and safety straps are secure.

(f) Reports to executive officer, SIR, NUMBER (SO AND SO) IN ORDER, or reports any defects the section cannot remedy immediately.