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 203 of 1313
EQUIPMENT DATA - Continued
Table
4.
Vehicle Performance Data - Continued.
Mount (Rear)
Rubber biscuit
Oil Pressure at Idle
10 psi (69 kPa)
Operating Speed (engine rpm)
2,100 rpm
Type
Diesel, liquid-cooled, turbocharged, after-cooled
COOLING SYSTEM
M939/A1 Series Vehicles:
Coolant Operating Temperature
175°F to 195°F (79°C to 91°C)
Fan, 6-blade
26 in. (660 mm)
Thermostat:
Starts to Open
175°F (79°C)
Fully Open
185°F (85°C)
M939A2 Series Vehicles:
Coolant Operating Temperature
190°F to 200°F (88°C to 93°C)
Fan, 7-blade
26.5 in. (673 mm)
Thermostat:
Starts to Open
181°F (83°C)
Fully Open
203°F (95°C)
Radiator Type
Crossflow
Surge Tank Cap Pressure
14 psi (97 kPa)
ELECTRICAL SYSTEM
Alternator:
Ampere Output (maximum)
60 amp
Model
Voltage Output
28 volts
Voltage Regulation
Mounted internal
Batteries:
Model
6TN
Number Required
4
TM 9-2320-272-23-1
0002
0002-22
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