5.
Install the steer pump and motor on the truck
(refer to Steer Pump and Motor Assembly
Replacement procedure in this section).
Steer Pump
Removal
NOTE
If the steer pump and motor assembly has
already been removed from the truck, proceed
to Step 6.
1.
Tilt the mast to the full forward position.
2.
Disconnect the battery and discharge the
capacitors.
3.
Remove the front cover.
4.
Clean the area around the hydraulic
connections to the steer pump.
5.
Disconnect and cap the hydraulic lines from
the steer pump.
6.
Remove the hex screws securing the steer
pump to the steer pump motor.
7.
Separate the steer pump from the steer pump
motor. Remove the steer pump.
Replacement
1.
Position the steer pump on the steer pump
motor shaft.
2.
Attach the steer pump to the steer pump
motor and tighten the screws to 17 lb-ft.
3.
Attach the hydraulic lines to the steer pump in
the correct locations.
4.
Reinstall the front cover and connect the
battery.
Steer Pressure Adjustment
1.
Attach a pressure gauge to the test port on the
outlet fitting of the steer pump using the
pressure check hose kit 9650041.
2.
Remove the hex cap covering the relief
pressure adjustment screw on the bottom of
the pump.
3.
Turn the steer pump motor on using Output
Test 02 (refer to Programming and
Diagnostics section).
4.
Turn the steer tiller until the fork reaches
either stop. Continue to turn the tiller and
read the pressure gauge while the pump
operates against relief. The pressure should
reach approximately 900 psi.
5.
Use a #3 slotted “stubby” screwdriver to adjust
the relief pressure. Turn the screw clockwise
to increase pressure, and counter-clockwise to
decrease pressure.
6.
When relief pressure is set, install the hex cap
over the adjustment screw. Remove the
pressure check hose and gauge.
Steer Control Valve
Removal
1.
Disconnect the battery and discharge the
capacitors.
2.
Remove the tiller, top cover and the control
cover.
3.
Remove the pad on the left side of the
operator compartment.
4.
Place identifying tags on all of the hydraulic
hoses. Note the orientation of the steer
control valve to the mounting bracket.
CAUTION
Before loosening any hydraulic hose, allow
the truck to sit for 1 to 2 minutes to relieve
pressure.
When removing hydraulic hoses,
use care to avoid contaminating electrical
components with oil.
5.
Disconnect and cap the hydraulic hoses from
the steer control valve.
6.
Remove the steer control valve mounting
bracket from the truck.
7.
Place the steer control valve and bracket on a
clean work surface. Remove the mounting
screws. The steering column will separate
from the bracket and valve.
Replacement
1.
Attach the steer control valve and the steering
column to the mounting bracket in the same
orientation noted in Step 4 of Removal.
2.
Install the steer control valve and mounting
bracket assembly to the truck.
E
lectric
C
ounterbalance
H
igh
O
utput
Steering
REV W1 11/02/99
4.2
