TM-9-2350-311-20-2

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

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS

DECEMBER 1993

TM-9-2350-311-20-2 - Page 132 of 828

TM 9–2350–311–20–2

Change 2

3–23

Check hydraulic pressure on replenisher pressure

gage after mount has cooled (TM 9–2350–311–10).

Is replenisher pressure 17–24 psi (117.215–165.48 kpa)?

yes

no

Add hydraulic fluid

(TM 9–2350–311–10).

CONTINUED ON NEXT PAGE

Inspect components that control the recoil and

counter recoil operations for bends and gouges.

Is recoil and/or counter recoil damaged?

yes

no

Notify support

maintenance.

D

E

CONTINUED FROM STEP C

F

1.

Using manual elevation handle, depress

cannon assembly to maximum depression

(TM 9–2350–311–10).

2.

Loosen right-hand bleed plug and bleed

trapped air from rear of buffer. Tighten

right-hand bleed plug when air-free fluid flows

(TM 9–2350–311–10).

3.

Using manual elevation handle, elevate cannon

assembly to 50 mils (TM 9–2350–311–10).

4.

Loosen left-bleed plug and bleed trapped air

from front of buffer. Tighten left-hand bleed plug

when air-free fluid flows (TM 9–2350–311–10).

5.

Using manual elevation handle, elevate cannon

assembly to 180 mils (TM 9–2350–311–10).

6.

Loosen bleed plug on bleeder tee and bleed

trapped air until air-free fluid flows. Tighten

bleed plug (TM 9–2350–311–10).

Does air-free fluid flow?