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| MIL-T-52843C
APPENDIX
TEST METHOD NO. 21
PUMP INLET PRESSURE
1.
TEST APPARATUS:
a. Pressure gage (vacuum).
b. Hydraulic fittings (as required).
c. Thermocouple.
2.
TEST PROCEDURE:
a. Install a pressure (vacuum) gage in the pump suction line
immediate adjacent to the pump and a thermocouple in the
hydraulic tank.
b. Heat the oil to specified temperature.
c. Run the pump at the maximum speed it can encounter during
vehicle operation and record the pump-inlet pressure and
temperature.
d. Repeat for each pump installation on the truck.
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