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TM 10-3930-653-14&P
4.
Install the bushing marked "A’ on it, end face, in the
pump body.
5.
Install seal ring (with support ring) on the bushing.
Install O-ring in the pump body and put the cover on
the pump body, aligning the lubrication oil hole in the
cover with the oil hole in the pump body.
6.
Install the cover with socket head cap bolts.
Tighten the bolts to the specified torque. Center
punch around the bolt heads, to lock them.
7.
Pour a small amount of hydraulic fluid through the
inlet port and turn the shaft counterclockwise to
make sure that the reassembly is correct. If the
shaft turns reluctantly, recheck the unit.
TRIAL RUN
After reassembly be sure to do the
following steps to assure proper
break-in of pump.
CAUTION
If the temperature of the dump body
rises abnormally during the trial run,
put the pump in a no load condition,
and after the temperature lowers to
normal, resume the trial. If abnormal
noise is produced from the pump,
stop the trial operation and find the
cause.
A.
If the break-down of the pump was caused by
"seizure" or undue wear of inner surface, replace the
hydraulic fluid and filter.
B.
Make sure that the pump correctly aligned on the
engine.
C.
Make sure that there are no loose
connections.
1.
Install a hydraulic gauge of 3,000 psi capacity on the
pressure measuring port of the control valve.
2.
Leave the control valve in the neutral mode, start
the engine and run at about 1000 rpm for 10
minutes.
3.
Increase the engine speed up to 1500 thru 2000
rpm and keep this rpm for 10 minutes.
4.
Loosen the lock nut of the relief valve and turn the
set screw counterclockwise so that only two or three
threads of the screw are engaged.
5.
Keeping the engine speed at 1500 thru 2000 rpm,
raise the pressure by 284-427 psi every 5 minutes.
Repeat this procedure until the setting pressure of
the machine is reached.
4-204
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