SECTION 14: STEERING
10
PA1621 Maintenance Manual All Series | January 2017
the functional aspects and maintenance
procedure of the steering gear.
3.2 POWER STEERING GEAR REMOVAL
WARNING
The steering gearbox weighs approximately 100
lbs (45 kg) dry. Exercise caution when handling.
1. Put a container into place, and then
disconnect both the inlet and outlet hoses
from the power steering gear. Cover fittings to
prevent fluid contamination.
2. Mark both the pitman arm and sector shaft
with a line, then remove pitman arm. Refer to
"11.1 Pitman Arm Removal" procedure.
3. Mark both the steering shaft universal joint
yoke and steering gear input shaft with a line,
then disconnect universal joint.
4. Unscrew and remove the power steering gear.
3.3 POWER STEERING GEAR
INSTALLATION
Reverse "Power Steering Gear Removal"
procedure paying particular attention to the
following:
1. Tighten fasteners as recommended according
to torque tables.
2. Bleed air from the system as per paragraph 4
(Bleeding power steering hydraulic system).
FIGURE 5: PITMAN ARM ADJUSTMENT
3.4 TROUBLESHOOTING
Perform troubleshooting of the steering gear as
outlined in the "ZF-SERVOCOM Repair Manual"
and “ZF-SERVOCOM Design, Operation,
Maintenance, Inspection” found on your
Technical Publications USB flash drive.
4. BLEEDING POWER STEERING
HYDRAULIC SYSTEM
To bleed the power steering hydraulic system,
refer to “ZF-SERVOCOM Design, Operation,
Maintenance, Inspection”, found on your
Technical Publications USB flash drive, under
heading "Setting and Functional Test".
5. HYDRAULIC PRESSURE TEST
Perform a pressure test as outlined in the "ZF-
SERVOCOM Repair Manual" annexed to this
section under heading "Setting and Functional
Test".
NOTE
For vehicles equipped with ZF-
SERVOCOMTRONIC (speed sensitive) unit,
refer to the supplement to the repair manual
ZF-SERVOCOM.
6. POWER STEERING HYDRAULIC PUMP
6.1 DESCRIPTION
The power steering pump is a gear driven
hydraulic unit which supplies hydraulic pressure
for the operation of the steering gear. The pump
is mounted on the engine, at the flywheel end and
is also used for driving the fuel pump.
6.2 REMOVAL AND INSTALLATION
The pump is accessible through the engine
compartment R.H. access door.
To remove the pump, proceed as follows:
1. You must first remove the fuel feed pump.
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