TM-9-2320-361-24-1
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2
AUGUST 2006
TM-9-2320-361-24-1 - Page 244 of 1176
TM 9-2320-361-24-1
0014 00
0014 00-8
INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd)
Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. OIL PRESSURE
GAUGE
INOPERATIVE
NOTE
If STE/ICE-R is available, perform
NG 31 gauge test (WP 0018 00).
Test 1. Test oil gauge operation.
1. Disconnect lead 36 at oil
pressure sending unit.
2. Turn power accessory switch
to ON position.
3. Oil pressure gauge should
show minimum pressure.
4. Touch contact end of lead 36
to frame ground. Oil pressure
gauge should show maximum
pressure.
Test 2. Test battery voltage to oil
pressure gauge. Go to
WP 0014 00, table 1,
malfunction 1, test 2.
1. Set multimeter to RX 1 scale.
2. Connect negative lead to
frame ground on engine.
3. Touch positive lead to contact
of oil pressure sending unit.
Resistance should measure
less than 1 ohm with engine
off (no oil pressure).
4. Remove oil pressure sending
unit. (WP 0106 00).
5. Install mechanical gauge.
6. Start engine and check oil
pressure on mechanical
gauge.
Test 4. Test continuity of lead 36.
1. Disconnect lead 36 from oil
pressure gauge.
2. Set multimeter to RX 1 scale.
3. Touch positive lead of
multimeter to one end of lead
36 and negative lead of
multimeter to other end of
lead 36.
1. If oil pressure gauge operates
properly, go to test 3.
2. If oil pressure gauge does not
operate properly, go to test 2.
1. If resistance is 1 ohm or more,
replace oil pressure sending unit
(WP 0106 00).
2. If resistance is less than 1 ohm,
continue with step 4.
1. If oil pressure is 10 psi or above at
idle, replace oil pressure sending
unit (WP 0106 00).
2. If oil pressure is less than 10 psi at
idle, gauge is accurate. Go to
WP 0008 00, table 1,
malfunction 13, to diagnose engine.
1. If continuity is not present, repair
or replace lead 36 (WP 0090 00).
2. If continuity is present, replace oil
pressure gauge (WP 0095 00).
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