Steering Linkage Installation Sequence; Pitman Arm; Removal; Installation - PREVOST H3-41 Maintenance Manual

SECTION 16 : SUSPENSION
4.2 STEERING LINKAGE INSTALLATION
SEQUENCE
NOTE
Whenever a steering linkage component has
been removed and replaced, check steering
geometry and front end alignment as directed
in this Section. Check to insure that all stud
nuts and mounting bolts and nuts have been
tightened to prescribed torque.
1. Position front wheels in straight ahead
position.
2. Align the steering gearbox input shaft marks.
3. Afterwards, the pitman arm should be
adjusted with output shaft and pitman arm
reference marks
tightening torque, refer to Torque Table 2).
FIGURE 11: STEERING
MARKS
FIGURE 12: STEERING GEARBOX OUTPUT SHAFT AND
PITMAN ARM MARKS ALIGNED
4. Locate centerline of vehicle then install relay
rod in boss at steering bell crank and idler
arm. Align center of relay rod with centerline
of vehicle.
5. Install drag link to pitman arm and adjust
opposite end of drag link to fit ball stud hole
in bell crank.
24 PA1621 Maintenance Manual All Series | Section revised October 2018
aligned (for proper
GEARBOX INPUT SHAFT
6. Install tie rods then adjust toe-in as
described in "Front End Alignment" in this
section (for proper tightening torque, refer to
Torque Table 2).
4.3

PITMAN ARM

4.3.1

Removal

1. Remove cotter pin, nut and washer 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 pitman arm on or off sector gear
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
linkage.
3. Remove pitman arm hold down nut.
4. Check the radial position of the pitman arm
in relation to the sector shaft prior removal of
pitman arm.
5. Locate the reference marks to the arm and
shaft to ensure
reassembly.
6. Use a puller to remove pitman arm.
4.3.2

Installation

1. Position pitman arm on sector gear shaft
with reference marks aligned.
2. Install hold down nut. Tighten nut (dry) as
per Torque Table 2.
NOTE
correct alignment at