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 715 of 775

TM 9-2350-311-10

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LUBRICATION INSTRUCTIONS — CONTINUED

5. CANNON BORE (C). — CONTINUED

NOTE

Steps a. and b. apply to cleaning and preserving cannon assembly only.

a. Day of Firing.

1

The following items are needed from the cleaning and preservative artillery kit (item 21, Appx D):

1 pre-measured bottle with CLP (item 8, Appx D)

2 Attach bore brush to cleaning staff section.

3 Inspect breech and cannon tube for obstructions

4 Wet punch the cannon tube as follows:

Clear obstructions, if necessary.

(a)

(b)

(c)

(d)

NOTE

Shake bottle well before each use.

Pour 1/4 of the bottle contents onto bore brush and punch the cannon tube once forward and once

back.

Pour another 1/4 of the bottle contents onto bore brush and scrub back and forth the entire length of

the cannon tube.

Repeat step (b) with another 1/4 of the bottle contents.

Pour final 1/4 of the bottle contents onto bore brush. Wet the entire length of the cannon tube once

forward and once back.

b. Day After Firing.

NOTE

If the cannon tube has not been previously cleaned with CLP (item 8, Appx D) and there is a

heavy build up of coppering or carbon deposits, or severe heat cracking is evident, it may be

necessary to repeat cleaning instructions until the cannon tube has been thoroughly cleaned

with CLP (item 8, Appx D). For non-firing periods, cannon tube is cleaned and lubricated weekly.

1

The following items are needed from the cleaning and preservative artillery kit (item 21, Appx D):

2 pre-measured bottles with CLP (item 8, Appx D)

3 disposable cleaning sleeves

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