TM-9-2350-311-20-1

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

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 314 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

q. TRANSMISSION OIL PRESSURE INDICATOR

TRANSMISSION OIL PRESSURE INDICATOR NEEDLE

CIRCUIT — CONTINUED

FAILS TO MOVE OR IS UNSTEADY; ALL OTHER GAGES

OPERATE PROPERLY — CONTINUED

CONTINUED FROM STEP D

I

F

1. Reconnect lead 27 to circuit breaker output.

2. Disconnect lead 10 from circuit breaker

input.

3. Place red lead of multimeters in lead 10

and black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

(para 3-3b)

Troubleshoot master relay circuit

Replace circuit breaker (para 8-33,

M109A2/M109A3; 8-34, M109A4/M109A5).

I

3-214