PREVOST H3-41 Maintenance Manual page 558

SECTION 16 : SUSPENSION
added source of assistance and ensures that the
total steering forces are produced with minimal
stress on mechanical linkages.
Lower and upper A-arms are widely spaced.
They are mounted on ball joints. Torque rods
prevent rotation of the uprights around the lower
and upper ball joints.
If the steering linkage is bent, twisted or worn,
steering action of the coach will be seriously
affected. Any time steering linkage components
are replaced or adjusted, steering geometry and
front wheel alignment must be checked as
explained in this section.
Turning Angle
The maximum turning angle is set mechanically
through the two steering stop screws installed on
the swivel assembly.
mechanical stop is
accommodate the chassis design, and therefore,
does not require adjustment on new vehicles.
However, turning angle should be checked and
hydraulically adjusted, if necessary, any time a
component of the steering system is repaired,
disassembled or adjusted.
Turning angles are as follows:
Exterior: 49.5° ± 0.5°
Interior: 58° ± 0.5°
Before checking the turning angle, be sure the
front end is properly aligned as described under
paragraph FRONT END ALIGNMENT in this
section.
To check steering maximum turning angle,
proceed with the following method:
1. Lift the vehicle using the axles lifting
points. Suspension must be at normal ride
height.
2. Check if front tires rub against the frame
or if the steering gear has been serviced.
3. While performing a full left and right turn,
check for proper position of the tie rod end
clamp bolt and nut and drag link end clamps
in order to avoid clamps interfering with
close parts. Refer to FIGURE 17 & FIGURE
18 for location and positioning of clamp bolts
and nuts. Reposition if required.
22 PA1621 Maintenance Manual All Series | Section revised October 2018
The turning angle
factory adjusted to
CAUTION
Clamp bolts are either in a vertical or
horizontal position. Reinstall clamp bolts
exactly as they were before removal as they
might interfere with other components.
4. If necessary readjust hydraulic steering
limiter, see Setting the hydraulic steering
limitation in the following manual:
RB Robert Bosch Servocom - Service
•
Manual (8090)_2016
NOTE
Prior to hydraulic steering limiter adjustment,
verify vehicle wheel alignment, and ensure that
oil level is adequate and that air bleeding is
done.