Models
Revision 03-2012
36
Toucan 1210
Toucan 1310
Troubleshooting
HYDRAULIC SYSTEM
3
3
PROBABLE CAUSE
SOLUTIONS
Regular
rumbling
Worn bearing support
Replace the bearing support
Vibrations
Mounting and/or hydraulic
piping becoming loose
Tighten to torque
Clattering
Boost pressure too low
- Check the pressure setting and condition of the
counterbalance valves
(Wheel motor distribution manifold)
- Check boost pressure. Check for any leak in the drive circuit.
Cavitation
Internal leaks too important
Replace the cylinder block and the distribution valve assembly :
Contact JLG Product Support
No supply to the motor
Check the pump drive and pump inlet
The circuit does not reach
working pressure
- Check the position of the motor release valve.
- Check the condition of the pressure relief valve [PR1]
- Check the supply and condition of the solenoid valve [EVC]
(Brake manifold).
Excessive internal leaks
Replace the cylinder block and the distribution valve assembly :
Contact JLG Product Support
The brake stays engaged
- Check the brake pilot circuit.
- Check the brakes bleeding screws,
- Check the supply and condition of the solenoid valve [EVF]
(Brake manifold).
The pump flow is too low
- Check the condition of the gear pump.
- Check the acceleration input received by the electronic
controller.
Excessive internal leaks
Check the condition of the cylinder block and of the distribution:
Contact JLG Product Support.
- Check setting and condition of the counterbalance valves
(wheel motor distribution manifold)
- Check the drive circuit for leaks.
- Check the supply and condition of the solenoid valve [EVC]
(Brake manifold).
- Check the condition of the motor release valve.
- Check the condition of the piloted 2 way spool (Brake
manifold).
Irregular flow
- Check the oil level in the reservoir.
- Check the pump flow.
Excessive leaks
Check the condition of the cylinder block and of the distribution
valve assembly : Contact JLG Product Support.
Too high housing pressure Check the drain circuit
Damaged seals
Replace the seals : Contact JLG Product Support.
Incorrect assembly
Tightening of motor mounting screws, of bleeding screws and
hydraulic fittings.
Working pressure is too low
THE MOTOR DOES NOT REVOLVE
THE MOTOR DOES NOT REVOLVE AT ITS
NORMAL SPEED UNDER LOAD
THE MOTOR REVOLVES IRREGULARLY
SYMPTOMS
EXTERNAL OIL LEAKS
NOISY MOTOR
Without load
Under load