265
229042ABASJ46 AJ+, SJ46 AJ, SJ51 AJ
Manifold and Hydraulic Pumps Section 5 – Procedures
5.9-6 Test Charge Pump Pressure on
Drive Pump
1. Locate test port TP3
1
on the drive pump.
2. Connect a pressure gauge 41.5 bar (600 psi) to
the test port.
1
2
3. Start the engine from the base control console.
WARNING
To protect the gauge, do not activate any controls
during this procedure.
4. Check the reading on the gauge. Standard
pressure should be 21.5 ±2 bar (313 ±31 psi).
5. Replace the charge pump relief valve RV3
2
if
the standard 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.
5.9-7 Test Forward Drive Pressure on
Drive Pump
NOTE
Make sure the charge pump pressure test is
completed first.
1. Locate test port TP1
2
on the drive pump.
2. Connect a pressure gauge (690 bar / 10 000 psi)
to test port TP1.
2
3. Start the engine from the platform control
console.
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 quickly 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 the pressure is not
achieved.
8. Turn the engine off.
9. Remove the pressure gauge from the port, cap
the port, and re-plug the brake solenoid power
cable.
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