MIL-PRF-46750E(AT)
4.3.2 CI. CI shall include the tests and examinations from table V as defined in the
contract (see 6.4).
4.3.3 Operating requirements verification.
4.3.3.1 Oil temperature and oil level. The transmission shall be filled with oil within the
operating range and operated as required to bring oil to operating temperature. The transmission
shall be checked to meet performance requirements and show no evidence of leakage. The
vehicle shall then be stopped for 3 minutes and checked for oil level.
4.3.3.1.1 In vehicle operation. The transmission shall be installed into a government
selected vehicle, filled with proper oil to operating range, and operated. After the vehicle has
been stopped for 3 minutes, the transmission shall be checked for oil leakage.
4.3.3.2 Functional operation. The range selector level shall be placed in the third range
position. With the output shafts stalled by the dynamometers, increase input speed to
980-1220 rpm and run at this speed for a minimum of one minute. Run at 300-400 rpm input
speed, and functionally check all steer and shift positions for any indication of mechanical
malfunction.
4.3.3.2.1 First to second range shift. Transmissions shall be operated between
300-400 rpm input speed and shifted from first to second gear and checked for performance
requirements.
4.3.3.2.2 Brake adjustment. Adjusted brakes shall be checked for meeting torque and
alignment requirements.
4.3.3.3 Fourth range stall. The range selector level shall be placed in the fourth range
with the throttle valve full on and the out shafts stalled. Input torque shall be increased to
between 1000-1006 N-m (738 and 742 ft-lb) and transmission checked for performance
requirements.
4.3.3.4 Third range steer. With the range selector in third range, the throttle valve full
"on", with an input speed of 1490-1510 revolutions per minute (rpm) and 271-813 N-m
(200-600 lb-ft) torque load on output shafts, monitor the cooler oil flow. Slowly move the steer
lever from "no steer" position to RH steer until RH output clutch pressure drops to 0 and monitor
the steer level travel; continue to move the steer lever until steer clutch pressure is noted and
monitor the steer lever travel; continue to move the steer lever to 15° rotation; transmission
performance shall be as specified in table I. Move the steer lever to full RH steer position and
monitor the cooler oil flow. The cooler oil flow shall be at least 0.5 L/s (8 gallons per minute
(gal/min)) less than recorded at "no steer" position. Increase input torque to 1000-1006 N-m
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