Steering Linkage Adjustment; Coaches; Vip & Bus Shells; Pitman Arm - PREVOST H3-41 Maintenance Manual

SECTION 14: STEERING
CAUTION
Reduce or shut off the power steering hydraulic
pressure before the boss on the knuckle
touches the stop screw. If not, the components
of the front axle will be damaged (refer to "ZF-
SERVOCOM Repair Manual" and "RB Robert
Bosch Servocom - Service Manual (8090)",
found on your Technical Publications USB
flash drive, under heading "Setting The
Steering Limiter" or "Setting the hydraulic
steering limitation").

11. STEERING LINKAGE ADJUSTMENT

Steering linkage pivot points should be checked
each time they are lubricated. Looseness can be
visually detected while rotating the steering wheel
in both directions. Replace defective parts.

11.1 COACHES

The steering linkage includes the pitman arm,
drag link, steering arm, tie rod arms and tie rod.
CAUTION
Front wheel alignment should be checked and
adjusted if necessary, any time a component of
the steering system is repaired, disassembled
or adjusted. Refer to section 10 "Front Axle"
under heading 6. "Front Wheel Alignment".
11.2 VIP & BUS SHELLS
The steering linkage consists of tie rods
connected to the bell crank and the steering arm
at the left side of the bus shell, and to the idler
arm and steering arm at the right side of the bus
shell.
16 PA1621 Maintenance Manual All Series | Section revised June 2019
CAUTION
Front wheel alignment should be checked and
adjusted if necessary, any time a component of
the steering system is repaired, disassembled
or adjusted. Refer to section 16 "Suspension"
under heading: "Front End Alignment".

12. PITMAN ARM

12.1 REMOVAL

1. Remove cotter pin, nut and washers from
drag link ball stud at pitman arm.
2. Disconnect drag link from pitman arm, using
jaw style pullers (pressure screw type).
WARNING
Always wear approved eye protection when
operating pullers.
CAUTION
Do not drive (hammer in) pitman arm on or off
pitman shaft as this can damage the steering
gear.
CAUTION
Heating of components to aid in disassembly is
not allowed because it has a detrimental effect
on axle components and steering linkages.
3. Using a cold chisel, undo punch mark that
locks fixing nut to the pitman arm.
4. Remove pitman arm fixing nut.
5. Check the radial position of the pitman arm in
relation to the sector shaft prior to removal of
pitman arm.