TM-9-2320-272-23-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-1 - Page 880 of 1313

OIL PRESSURE GAUGE INOPERATIVE (OIL LEVEL IS CORRECT) - Continued

c.

Remove circuit 36 wire from oil pressure sending unit.

d.

Place battery switch to ON position.

e.

Have assistant momentarily ground disconnected circuit 36 wire.

NOTE

If oil pressure gauge deflects when grounded, oil pressure sending unit is faulty.

f.

Observe oil pressure gauge for movement.

CONDITION/INDICATION

IS OIL PRESSURE SENDING UNIT OPERATIONAL?

DECISION

YES - Go to Step (2).

NO - Replace oil pressure sending unit (Volume 2, WP

0333). Go to Step (4) to verify problem is solved.

TM 9-2320-272-23-1

0103

0103-3