Power Steering Gear; Power Steering Gear Removal; Power Steering Gear Installation; Troubleshooting - PREVOST H3-41 Maintenance Manual

SECTION 14: STEERING
3.2 POWER
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
INSTALLATION
Reverse
"Power Steering
procedure paying particular attention to the
following:
1. Tighten fasteners
according to torque tables.
2. Bleed air from the system as per paragraph 4
(Bleeding power steering hydraulic system).
FIGURE 5: PITMAN ARM ADJUSTMENT
10 PA1621 Maintenance Manual All Series | Section revised June 2019
STEERING GEAR
STEERING GEAR
Gear Removal"
as recommended
3.4

TROUBLESHOOTING

Perform troubleshooting of the steering gear as
outlined in the "ZF-SERVOCOM Repair Manual"
and "RB Robert Bosch Servocom - Service
Manual (8090)" found
Publications USB flash drive.
4. STEERING GEARBOX HYDRAULIC END
LIMITER ADJUSTMENT
Refer to the following technical information when
experiencing steering gearbox jerking, wheels
hard to turn and noisy gearbox when wheels are
turned all the way.
Two potential failure modes could cause the
problems described above:
1) Air in the system – Need to bleed the air in
the system (refer to RB Robert Bosch
Servocom - Service
available on the
Publicatios site).
2) Pressure relief limiter
correctly. Replace the limiter screws on
the steering gearbox when setting the
alignment that could have changed the
mechanical end lock position of the vehicle
or if the maintenance technician took the
steering gearbox to a full lock position
without having all the steering mechanical
connections installed or linked.
A setting of the steering limitation is necessary if
or when:
a) A new or repaired steering gearbox is fitted or
b) New screws (20 and 128) were fitted to the
automatically adjusting steering limitation or
c)
Alterations to or adjustments of the front axle
were carried out.
Find the end limiter adjustment procedure in
Maintenance Information MI20-12 available
on Prevost Technical Publications site.
on your Technical
Manual (8090),
prevost Technical
screws not set