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 123 of 828

TM 9–2350–311–20–2

3–14

3–3

TROUBLESHOOTING CHART — CONTINUED

b.

CANNON — CONTINUED

(1)

JERKY RECOIL.

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Personnel Required

2

References

TM 9–2350–311–10

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)?

Depress cannon assembly to zero mils and inspect

muzzle brake (TM 9–2350–311–10).

Are cracks more than 1 inch (2.54 cm) long present?

A

B

yes

no

Replace muzzle brake

(TM 9–2350–311–10).

yes

no

Add hydraulic fluid, bleed

system, and check for leaks

(TM 9–2350–311–10).

CONTINUED ON NEXT PAGE