Skyjack SJ85 AJ Service Manual

201
SJ85 AJ 229044ADA
Manifolds and Hydraulic Pumps Section 5 – Procedures
5.8-11 Test Forward Drive Pressure on
Drive Pump
NOTE
Make sure the charge pump pressure test is
completed first.
1. Locate test port TP1
1
on the drive pump.
2. Connect a pressure gauge (700 bar / 10000 psi)
to test port TP1.
1
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.
5.8-12 Test Reverse Drive Pressure on
Drive Pump
NOTE
Make sure the charge pump pressure test is
completed first.
1. Locate test port TP2
2
on the drive pump.
2
2. Connect a pressure gauge (700 bar / 10000 psi)
to test port TP2.
WARNING
To protect the gauge, do not activate any controls
during this procedure.
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 in reverse 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.
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Skyjack SJ85 AJ Specifications

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English