MIL-PRF-46750E(AT)
4.3.3.12 Brake coolant pump flow. With the range selector in fourth range, throttle valve
full "on", the output shaft uncoupled from the dynamometers and an input speed of
1995-2005 rpm, and check for proper brake coolant oil flow when the respective brake apply
lever is moved in the apply direction.
4.3.3.13 Shift inhibitor evaluation. With the range selector in fourth range, throttle valve
full "on", the output shafts uncoupled from the dynamometer, and an input speed of
1490-1510 rpm, reduce the input speed until a fourth to third range downshift is permitted by the
down shift inhibitor. Repeat the operation starting in first range for a first range to neutral shift.
The input speeds at which the shifts are permitted shall be within the specified speed values.
4.3.3.14 Range upshift. With the range selector in third range, no throttle valve
displacement, the output shafts uncoupled from the absorption dynamometers and an input speed
of 1490-1510 rpm with the lockup clutch engaged, shift into fourth range. Lockup pressure must
drop momentarily as the shift is made and return to 862 kPa (125 psi) minimum when the shift is
completed.
4.3.3.15 Speedometer drive check. Operate left-hand output as specified and check for
rotation.
4.3.3.16 Oil warm-up. Monitor cooler-in temperature during range shifts (see 4.3.3.14
and 4.3.3.17).
4.3.3.17 Range shifts. With the range selector in desired range, no throttle valve pressure,
with an input speed of 600-800 rpm and no load on output shaft, the transmission shall be shifted
in first, second, third and fourth range and then back to third, second and first range. Shifts shall
be intermittent to allow the clutches to engage.
4.3.3.18 Output and steer pressure evaluation. Operate transmission with the range
selector in desired range, no throttle valve pressure, the output shafts uncoupled from the
dynamometers and an input speed of 975-1025 rpm, and check for performance requirements.
4.3.3.19 Brake and steer clutch performance. Full steer clutch shall be applied in first,
second, third, and fourth range. Proper action of the brake and steer clutches shall be checked in
accordance with table VI. Both LH and RH steer shall function when applied.
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