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 311 of 1275

TM 9-2350-311-20-1

TRANSMISSION OIL PRESSURE INDICATOR NEEDLE

FAILS TO MOVE OR IS UNSTEADY; ALL OTHER GAGES

OPERATE PROPERLY

Tools

Personnel Required

.

General mechanic’s tool kit (item 64, Appx H)

Two

Multimeters (item 36, Appx H)

TA-1 probe kit (item 43, Appx H)

. .

Equipment Conditions

(Long test leads may be needed for some tests;

Engine access door open (TM 9-2350-31 1-10)

16 AWG wire maybe used as an extension.)

Transmission access doors open (TM 9-2350-311-10)

Portable instrument panel cover removed (para 8-17’)

A

1. Disconnect lead 321 from transmission oil

pressure transmitter.

2. Turn MASTER switch ON and check

TRANSMISSION OIL PRESSURE gage for a

reading.

3. If TRANSMISSION OIL PRESSURE gage

shows a maximum reading, place a jumper

wire from lead 321 to ground.

4. Check TRANSMISSION OIL PRESSURE

gage for reading.

5. Turn MASTER switch OFF.

Does TRANSMISSION OIL PRESSURE gage show

minimum when grounded and maximum when not

grounded?

Replace transmission oil pressure

transmitter (para 8-1 2).

&

TRANSMISSION OIL

m

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