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 130 of 828

TM 9–2350–311–20–2

Change 2

3–21

Verify fault is corrected.

Continue normal opera-

tions.

1.

Return vehicle to firing ready condition

(TM 9–2350–311–10).

2.

Fire cannon in accordance with

TM 9–2350–311–10.

Does cannon have excessive recoil travel?

CONTINUED FROM STEP B

yes

no

Notify support mainte-

nance.

END OF TASK

Add hydraulic fluid, bleed

system, and check for leaks

(TM 9–2350–311–10).

C

Check hydraulic pressure on replenisher pressure

gage (TM 9–2350–311–10).

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

yes

no

Repeat step B. If recoil

system cannot be bled af-

ter several attempts, notify

support maintenance.

yes

no

yes

no

Check recuperator assembly nitrogen pressure

(para 19–2).

Is recuperator assembly pressure 700

±

25 psi (4827

±

172 kPa)?

Service recuperator assem-

bly with nitrogen (para

19–2). Repeat step C.

D

E