MIL-DTL-62270B(AT)
3.3.3.5 Communications system power supply. Provisions shall be made through a
mating connector to supply power to the communications system from the hull electrical system
(see 4.6).
3.3.4 Fluid systems.
3.3.4.1 Hydraulic system. Provisions shall be made to assure internal cleanliness of the
(chassis) hydraulic system. Hydraulic lines and connections shall be free from leakage in excess of
a seep (see 4.4 and 6.3.1).
3.3.4.2 Fuel system. Provisions shall be made to assure internal cleanliness of the fuel
system prior to initial fueling. Fuel system shall be free from leaks (see 4.4).
3.3.4.3 Fuel tanks (rapid fill). Fuel tanks shall be capable of receiving 50 gallons (gal) of
fuel per minute (see 4.6).
3.4 Operating requirements.
3.4.1 Performance. After being subjected to the break-in run and procedures of 3.4.1.25,
the chassis, loaded to simulate an M48A5 vehicle weight of 104 000 pounds (lb), shall perform as
specified herein under all operating conditions (see 4.7.1).
3.4.1.1 Power plant and powertrain. The power plant shall function throughout all gear
and speed ranges without loss of lubricants or damage that may cause failure of the chassis. The
powertrain and associated controls shall be capable of operation throughout all speed and steering
ranges without binding of linkages, loss of lubricants, grabbing, chattering, or spillage when
controls are applied to steer, stop, or hold chassis (see 4.7.1.1).
3.4.1.2 Cooling system. With the chassis operating in an ambient temperature of 115°F,
the engine oil temperature shall not exceed 250°F at the heat exchanger outlet. The transmission
oil temperature shall not exceed 300°F at the heat exchanger inlet. Temperature indicators on the
driver panel shall remain in the green area (see 4.7.1.2).
3.4.1.3 Level road acceleration. The chassis shall accelerate from a standing start to a
distance of 200 ft in not more than 13 seconds (see 4.7.1.3).
3.4.1.4 Level road speeds. The chassis shall operate at sustained speeds of 30 miles per
hour (mph) and 2.5 mph on level road without damage to the power plant and powertrain
(see 4.7.1.4).
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