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 975 of 1313
NO CAB HEAT (COOLANT TEMPERATURE GAUGE READS NORMAL) - Continued
STEP
1.
ARE ENGINE COOLANT SHUTOFF VALVES IN OPEN POSITION?
a.
Visually check position of engine coolant shutoff valves.
T0493DAA
Figure 1.
Engine Coolant Shutoff Valve.
b.
Check if valves are in the open position.
CONDITION/INDICATION
ARE ENGINE COOLANT SHUTOFF VALVES IN OPEN POSITION?
DECISION
YES - Go to Step (2).
NO - Open engine coolant shutoff valves (TM 9-2320-272-10). Go to Step (3) to verify problem is solved.
STEP
2.
IS ENGINE COOLANT AT PROPER LEVEL?
a.
Bleed air from personnel heater.
CAUTION
Do not add coolant when engine is hot. Internal engine damage could result.
b.
Visually check engine coolant level.
TM 9-2320-272-23-1
0117
0117-2
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