Military Logistics Mfg

M-274 Mule


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Truck, Platform, Utility M-274

Model NSN stock No.
M-274 2320-049-4004
M-274A1 2320-064-6373
M-274A2 2320-074-1167
M-274A3 2320-782-6792
M-274A4 2320-782-5793

TRUCK, PLATFORM, UTILITY 1/4-TON, 4 X 4, M274, M274A1, M274A2, M274A3, AND M274A4,
is essentially a platform mounted on two axles and four wheels; with an air-
cooled, opposed-type gasoline engine under the platform at the rear of the vehicle.
Each lightweight vehicle is designed to carry light cargo over rough terrain at slow
speed with a very low silhouette and keep pace with riflemen at foot speeds in combat.
Each truck has a four wheel drive with three speeds forward and one reverse in the
transmission and a two-speed transfer case. A quick-change mechanism allows either two
or four-wheel steering to be used. There is no suspension system,
shock is being absorbed by low-pressure tires.
The vehicle does not have a cab, only a flat platform on which the driver's seat is mounted.
A handrail is attached to the platform and can be raised to accommodate payload or lowered for
shipping and storage. The engine and related power train units are located beneath the platform.
The seat and footrest may also be detached and stowed beneath the platform when the vehicle is to be towed and for shipping and storage.
The steering gear assembly is so constructed that in case of necessity, the driver can dismount,
disconnect the telescope brace holding the steerlng column in its upright position, and reposition
the column forward in front of the vehicle, and retain control while walking or crouching in front
of the vehicle.
Fording in water up to the bottom of the accessory drive pulley is safely possible, provided low speed and caution are used when entering water.
CHARACTERISTICS
Crew.............1
Net Weight........900 lbs
Gross Weight..... 2075 lbs
Allowence for operator......176 lb
Payload,
On highway...................1,000 lb
Off highway..................1,000 lb
Towing capacity...............none
Length ( platform )
M274.................. 118.62 in
M274A1/ M274A2.......... 118.62 in
M274A8/ M274A4.......... 118.62 in
Width
Over platform ...................46.8 in
Over side rail...................49 in
Height loaded
Over platform.................. 27.60 in
Over driver seat................42.24 in
Over steering wheel.............49.12 in
Ground clearence
At front steering arm..........12 in
Under engine ..................116 in
At rear axle...................12.26 in
Under Propeller shaft..........16.2 in
Live axle gear ratio...............187:1/drop gear ratio 2.20:1
Axles
Weight capacity
Empty Front....................... 326 lb
Rear........................ 676 lb
Loaded
Front ............................800 lb
Rear ............................1,100 lb
Tires:
Size ........................... 7.50 x 10
Ply............................. 4
Pressure:
Cross-country...................12 psi
Sand............................12 psi
Mud and snow....................10 psi
Fuel octane rating ..............83
Capacities:
Fuel..............................8 gal
Crankcase, refill:
M274,and M274AI...........2 qt
M274A2,M274A3,and M274A4..2 1/2 qt
Transmission and transfer.........2 qt
Brakes:
Service, type............ internal expanding, mechanical
Parking, type............ internal expanding, mechanical
Speeds........3 forward, 1 reverse with high and low range
At 4,200 rpm engine speed:
High range:
High.................25 mph
Intermediate................14 mph
Low and reverse...... 8 mph
Low range:
High ................13 mph
Interimediate................7 mph
Low and reverse...... 4 mph
Overall gear ratios:
Low and reverse.......2.93:1
Intermediate..........1.71:1
High..................1.00:1
Engine (M274, and M274A1):
Manufacturer.........Military Standard (Willeys)
Model No.:M274.......A0 3
M274A1.....A0 531
Type.................horizontal, opposed, air-cooled
Displacement........ 53 cu in.
Bore and stroke..... 2.75 x 2.25
Compression ratio....6.5:1
Brake horsepower (max w/std accessories).. 17(so 3,200 rpm)
Torque (max w/std accessories) ............30 ft lbs @3200 rpm
Governed speed (max) ..................... 4,200 rpm
Engine (M274A2, M274A3, and M274A4):
Manufactures....Militarly Standard (Continental Hercules)
Model .................... A042
Type .....................hoizontal, opposed, air-cooled
Number of cylinders........2
Piston displacement........42.4 cu in.
Bore and stroke............3.00 x 3.00
Compression ratio.................. 6.8:1
Brake horsepower (max w/std accessories)...13.6 fl 3,000 rpm
Torque ( max w/std accessories ) ..........26 lb-ft of 2,300 rpm
Governed speed (max).......................3,600 rpm
PERFORMANCE
Grade ability:
Side slope................40 percent
Longitudinal slope........60 percent
Angle of approach.........40 degrees
Angle of depature.........34 degrees
Turning radius:
Right..................... 9 ft. 2 in.
Left ..................... 9 ft. 10 in.
Folding depth............. 18 in.
Fuel consumption ......... 12.8 mpg (25mph)107.6 mi
Maximum speed..............25 mph



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