Service Manual
September 2016
Hydraulic Power Unit
86
AWP Super Series • IWP Super Series
Part No. 38139
How to Remove the Hydraulic
Power Unit - DC Models
1
Fully lower the platform.
2
Turn the key switch off and disconnect the
power supply.
3
IWPS models
: Pull the base lowering handle
to fully lower the base.
4
Remove the power unit cover.
5
Tag, disconnect and plug the hydraulic hoses.
Cap the fittings on the power unit.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil
to
squirt or spray.
6
Tag and disconnect the electrical wiring from
the valve coil.
7
Tag and disconnect the electrical wiring from
the motor start solenoid.
8
Support the hydraulic power unit with a lifting
device.
9
Loosen the power unit mounting plate
fasteners. Do not remove them.
10
Rotate the mounting plate away from the mast
to access the power unit mounting fasteners.
11
Remove the power unit mounting fasteners,
then remove the power unit from the machine.
Crushing hazard. The power unit
will fall unless it is
properly
supported.
Note: If a new power unit is installed, the pressure
relief valve must be properly adjusted. See 3
-
6,
How to Adjust the Pressure Relief Valve.
How to Remove the Hydraulic
Power Unit - Air Models
1
Fully lower the platform.
2
Turn the key
switch off and disconnect the
power supply.
3
Tag, disconnect and plug the hydraulic hoses.
Cap the fittings on the power unit.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the
oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
4
Support the hydraulic power unit with a lifting
device.
5
Loosen the power unit mounting plate
fasteners. Do not remove them.
6
Rotate the mounting plate away from the mast
to access
the power unit mounting fasteners.
7
Remove the power unit mounting fasteners,
then remove the power unit from the machine.
Crushing hazard. The power unit
will fall unless it is properly
supported.
Note: If a new power unit is installed, the pressure
relief valve must be properly adjusted. See 3
-
6,
How to Adjust the Pressure Relief Valve.
