TM 55-4920-394-13&P
b. Increase system pressure to 1000 psig. Volume must remain the same.
c. Increase system pressure to 1200 psig. Volume must remain the same.
d. Increase system pressure to 1400 psig. Volume must remain the same.
e. Attempt to increase system pressure above 1500 psig to check pump for compensation control. Volume
should drop to zero.
f. Readjust VOLUME CONTROL to give 30 gallons per minute at 500 psig.
g. Repeat steps b through e at this pressure.
h. Close FLOW CONTROL valve and readjust COMPENSATOR CONTROL knob until OUTPUT
PRESSURE gage reads 3000 psig.
i. Open FLOW CONTROL valve and adjust VOLUME CONTROL to give a flow of 15 gallons per minute at
1000 psig.
j. Increase system pressure to 2000 psig. Volume should remain approximately the same.
k. Increase system pressure to 2700 psig. Volume should remain approximately the same.
l. Attempt to increase system pressure above 3000 psig to check pump for compensation control. Volume
should drop to zero.
m. Readjust VOLUME CONTROL to give 30 gallons per minute to 500 psig.
n. Repeat steps j, k and l at this pressure.
o. Reduce flow to below 15 gpm. Close FLOW CONTROL valve and turn COMPENSATOR CONTROL all
the way in and readjust high pressure relief valve to 5000 psig. Then adjust COMPENSATOR CONTROL until
OUTPUT PRESSURE gage reads 5000 psig.
p. Open FLOW CONTROL valve and adjust VOLUME CONTROL to give a flow of 15 gallons per minute.
q. Operate stand for one hour and check for fluid leaks.
4-47. Service After Test.
4-16
