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 131 of 828

TM 9–2350–311–20–2

3–22

Change 3

3–3

TROUBLESHOOTING CHART — CONTINUED

b.

CANNON — CONTINUED

(4)

CANNON DOES NOT RETURN TO BATTERY.

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 4933–95–A12)

Hose (item 2.2, Appx H)

Personnel Required

2

References

TM 9–2350–311–10

Check recuperator assembly nitrogen pressure

(para 19–2).

Is recuperator assembly pressure 700

±

25 psi (4827

±

172 kPa)?

A

yes

no

Service recuperator with

nitrogen (para 19–2).

Measure recuperator pins (inside and outside)

(TM 9–2350–311–10).

Do all recuperator pins protrude 1/4 to 3/4 inch (6.35 to

19.05 mm)?

B

Check cannon for obstructions.

Is cannon free from obstructions?

yes

no

Clear obstructions and-

verify fault is corrected.

Continue normal opera-

tions.

C

yes

no

Service recuperator with

hydraulic fluid (para 19–2).

CONTINUED ON NEXT PAGE