TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 33 of 1015
TM 9-2320-272-24-l
l-16. EQUIPMENT DATA (Contd)
Table 1-3. Vehicle Performance Data (Contd).
STANDARD
METRIC
Transmission:
AllModels(w/oPTO).
........................................
17qt
All Models (w/PTO).
..........................................
19 qt
All Models (w/o PTO and converter dry).
..........................
23 qt
All Models (w/PTO and converter dry).
..........................
25qt
Transfer Case:
All Models.
.............................................
6.25 gal.
Winch Gear Case (Front):
AllModels(W/W).
..........................................
2.6pt
Winch Gear Case (Rear):
M936, M936A1, M936A2 .
......................................
7 pt
3. ENGINE
M939/Al Series Vehicles:
Brake Horsepower.
........................
250 horsepower
@2,100 rpm
Cylinders.
.............................................
.6 (in-line)
Fuel Consumption .
.......................................
3-4 mpg
Idle Speed (engine rpm).
................................
600-650 rpm
Model.
.........................................
Cummins NHC 250
Mount(Front). . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . .
. . .
.Trunnion
Mount (Rear).
.......................................
Rubber biscuit
Oil Pressure at Idle.
.........................................
15 psi
Operating Speed (engine rpm) .
........................
1,500-2,100 rpm
Type .
.........................
Diesel, normally-aspirated, liquid-cooled
M939A2 Series Vehicles:
Brake Horsepower.
........................
240 horsepower @ 2,100 rpm
Cylinders.
.............................................
.6 (in-line)
Fuel Consumption .
.................................... .
5.5-6-0 mpg
IdleSpeed.
...........................................
565-635rpm
Model .
.........................................
Cummins 6CTA8.3
Mount(Front). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .
.
Trunnion
Mount (Rear).
.......................................
Rubber biscuit
Oil Pressure at Idle.
.........................................
10 psi
Operating Speed (engine rpm) .
.............................
2,100 rpm
Type.
....................
Diesel, liquid-cooled, turbocharged, after-cooled
4. COOLING SYSTEM
M939/A1 Series Vehicles:
Coolant Operating Temperature.
............................
175-195°F
Fan, 6-blade.
..............................................
.26 in.
Thermostat:
Starts to Open .
.........................................
..175° F
Fully Open. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
... . . . . . . . . 185°F
16.1 L
18.0 L
22.1 L
23.7 L
23.7 L
1.2 L
3.3 L
1.3-1.7 km/L
103 kPa
2.3-2.6 km/L
69 kPa
79-91°C
660 mm
79°C
85°C
M939A2 Series Vehicles:
Coolant Operating Temperature.
............................
190-200°F
Fan, 7-blade
.............................................
.26.5 in.
Thermostat:
88-93°C
673 mm
Starts to Open. . . . . . . . .
............................................
181°F
83°C
Fully Open.
...............................................
203°F
95°C
1-23
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