Landoll Bendi B40i4, Maintenance Manual

Page: 73 / 142

TROUBLESHOOTING AND CORRECTIVE MAINTENANCE
3-25
Figure 3-11: Front Rotation Potentiometer
To Center the Steer Pot
1. Loosen 10-32 x 3/4 hex head cap screws connecting
steer pot bracket to rotation
switch bracket.
2. Adjust steer pot bracket until centered over the
potentiometer drive rod, located in the top of the front
rotation shaft. See Figure 3-11.
NOTE
Once centered you must calibrate the pot, see Dash
Display Operation and Calibration in Chapter 4 on page
4-16.
3. Tighten down the set screw.
To Adjust and/or Replace the Steer Pot
1. First, review “ Before You Begin,” page 1-1.
2. Position the forks (mast) straight ahead.
3. Set the key switch to “OFF” and remove the key.
4. Disconnect the battery.
5. Remove the plastic front rotation cover to expose the
internal gearing and steer rotation pot assembly.
6. Loosen the two #10-32 X 3/4 hex head cap screws
and “evenly” position the steer rotation pot assembly
until rotation pot is centered over the potentiometer
drive rod, located in the top of the rotation shaft. See
Figure 3-11
.
7. If the pot is being replaced, disconnect the electrical
connector and remove the #8-32 x 1-1/2 round head
bolts and hardware.
8. Install the new pot assembly in reverse order.
9. Tighten and torque the screws accordingly, refer to
torque specification charts beginning on page 1-17.
Auxiliary Pump - Steer and Lift
Circuit
The auxiliary pump is located at the end of the
hydrostatic pump (toward the front of the forklift).
The pump supplies fluid to the load sense/fan control
valve. This valve controls the flow to the steering circuit
based on demand, and the cooling fan according to a
signal from the vehicle controller. Excess flow is sent to
the mast hydraulic valve for use on mast functions. See
Figures 3-12 and 3-14.
Replacing the Auxiliary Pump - Steer
and Lift Circuit
1. First, review “Before You Begin,” page 1-1.
2. Set the key switch to “OFF” and remove the key from
the ignition switch.
3. Apply the parking brake, disconnect the battery and
block the wheels.
4. Relieve pressure in the system by turning the
steering wheel two times to the left, then two times to
the right and move the controls in both directions.
5. Remove the floor plate cover. See “Floor Plate
Removal,” page 3-16.
IMPORTANT
If the pump requires servicing, disconnecting the
suction line hose will cause excessive
oil drainage
from the hydraulic tank.
To limit the amount of drainage:
• You can empty the hydraulic tank, particularly when
an oil and oil filter change is due or if dirty oil is
suspect with a pump failure.
• You can remove the oil filler cap located on the truck.
Then have a helper hold an shop vacuum over the
filler opening to create a “partial” vacuum in the tank.
It is not necessary to seal the opening tight.
Wrapping your hand around the opening is sufficient.
6. Remove hose assemblies.
7. Remove the 2 mounting bolts of the pump. See
Figures 3-12 and 3-14.
NOTE
Immediately plug and cap all tube ends and pump ports
and tag each for identification. Have shop rags ready to
manage spills.
8. Remove top bolt and slide out the pump.
9. Remove and replace fittings in the new pump.
10. Reinstall in reverse order.