280
SJ63 AJ+, SJ63 AJ229043AAA
Section 5 – Procedures Manifold and Hydraulic Pumps
5.9-8 Test Charge Pump Pressure on
Drive Pump (RV10)
1. Locate test port TP3
1
on the drive pump.
2. Connect a pressure gauge (600 psi) to the test
port.
1
2
3. Start the engine from the base controls.
WARNING
To protect the gauge, do not activate any controls
during procedure.
4. Check the reading on the gauge. The standard
pressure should be 22 bar ±10% bar (313
±10% psi).
5. Replace the charge pump relief valve RV10
2
if
the pressure is not achieved.
6. Repeat steps 2, 3, and 4 after the charge pump
relief valve is replaced.
7. If the pressure is still not in range, repair or
replace the pump as necessary.
5.9-9 Test Forward Drive Pressure on
Drive Pump
NOTE
Make sure charge pump pressure test is
completed first.
1. Locate test port TP1
3
on the drive pump.
2. Connect a pressure gauge (700 bar/10000 psi)
to test port TP1
3
.
3
3. Start the engine from the platform controls.
4. Unplug the brake solenoid power cable (26) on
the brake valve.
5. Activate the drive function slowly forward with
the engine at high speed. The wheels should
not turn.
NOTE
Activating the drive function too fast will stall the
engine.
6. Check the reading on the gauge. The standard
pressure should be 345 bar (5000 psi).
7. Replace the pump if pressure is not achieved.
8. Turn the engine off.
9. Remove the pressure gauge from the port, cap
the port, and reconnect the brake solenoid
power cable.
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