Upright AB38, Service & Parts Manual

Page: 42 / 133

Maintenance
Section
4-12 AB38 Work Platform
4.9 Hydraulic Pump
(Figure 4-10)
If the hydraulic reservoir has not been
drained, suitable means for plugging the
hoses should be provided to prevent
excessive fluid loss.
REMOVAL
1. Mark, disconnect and plug hose assemblies.
2. Loosen the capscrews and remove the pump
assembly from the motor.
INSTALLATION
1. Lubricate the pump shaft with general purpose
grease and attach the pump to the motor with
the capscrews.
2. Using a crisscross pattern torque each
capscrew a little at a time until all the
capscrews are torqued to 27 Nm (20 ft. lbs).
3. Unplug and reconnect the hydraulic hoses.
4. Check the oil level in the hydraulic tank before
operating the work platform.
CAUTION
1. Pressure Hose
2. Suction Hose
3. Capscrew
4. Pump Assembly
5. Electric Motor
5
1
2
4
3
Figure 4-10: Hydraulic Pump
4.9
4.10 Traction Motor Maintenance
(Figure 4-11)
Before carrying out any maintenance
procedures on the Drive Motors ensure that
the electric circuit is disconnected i.e.
disconnect the batteries and unplug the
charger. It is also important that when dealing
with batteries the proper safety precautions
are adhered to. There is always a hazard of
sparks or explosive gas.
INSPECTING THE DRIVE MOTORS
Remove the inspection covers (Item 6) from the rear
section of the motor and examine the brushes for
excessive wear.
If required the brushes may need to be changed as
follows:
1. Lift the spring (Item 3)
2. Release the brushes and unscrew the bolts
(Item 2) from the brush box (Item 5)
3. Remove the brushes by pulling the electric
leads.
During these operations take care that
screws, washers or other materials do not
fall inside the motor.
4. After thoroughly cleaning the brush boxes,
insert the new brushes and check that they slide
correctly inside the seat (Item 5).
5. Tighten and lock the bolts (Item 2).
6. Push the springs back in place. Check the
constant pressure on all the brushes, and the
correct contact with the commutator.
7. Replace the inspection/ventilation covers.
CAUTION
WARNING