PREVOST X3-45 COMMUTER User Manual

SECTION 14: STEERING
30
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
1. Inspect all the systems that affect the wheel
alignment. See paragraph 15.1.1,
‘’Inspection Before Alignment’’ in this
section.
2. Check the hub bearings. See section 13,
‘’Wheels, hubs and Tires’’ under heading 8:
Front and Tag Axle Wheel Hubs.
3. Check and adjust the toe-in.
15.1.3 Major Front Wheel Alignment
Perform a major front wheel alignment to correct
steering and tire wear conditions.
Perform the major front wheel alignment in the
following sequence:
1. Inspect all systems affecting the wheel
alignment. See paragraph 15.1.1,
‘’Inspection Before Alignment’’ in this
section.
2. Check the hub bearings. See section 13,
‘’Wheels, hubs and Tires’’ under heading 8:
Front and Tag Axle Wheel Hubs.
NOTE
If steering angle stoppers are changed, a
special procedure is required for readjusting
gearbox steering limiter. See paragraph
15.1.7 ‘’Hydraulic Stop’’ in this section.
3. Check and adjust the turning angle
adjustment.
4. Check the camber angle.
5. Check and adjust the caster angle.
6. Check and adjust the toe-in.
15.1.4 Turning Angle Adjustment
The maximum turning angle is set through the
two steering stop screws installed on the axle
center. The turning angle is factory adjusted to
accommodate the chassis design, and
therefore, does not require adjustment on new
vehicles. However, it should be checked and
adjusted any time any component of the
steering system is repaired, disassembled or
adjusted.
Check if front tires rub against the frame or if the
steering gear has been serviced.
Proceed with the following method to check the
steering maximum turning angle:
15.1.5 R.H. Turn Adjustment
CAUTION
To prevent the steering damper from
interfering with the adjustment of turning
angles, make sure its fixing bracket is at the
correct locat
ion on the axle center (refer to
paragraph 13.5)
1. Turn steering wheel to the right until the
boss on the axle center touches the right
stop screw.
2. Verify the nearest point of contact of the ball
socket body with the air bellows support
assembly. Measure the distance between
those two points.
3. The distance between these two points
should be approximately 1/8 inch (3 mm). If
not, the steering stop screws must be
readjusted.
4. Verify the nearest point of contact of the
drag link with the tire. Measure the distance
between those two points.
5. The distance should be 1 inch (25 mm) or
more. If not, the steering stop screws must
be readjusted.
6. This must be done for a full right turn.
7. If readjustment is required:
a. Remove the swivel stop screw.
b. Add to the stop screw the required
number of washers to obtain the
proper measure, tighten the stop
screw afterwards. Two washers of
different thickness are available: 1/16
inch and 3/16 inch.
15.1.6 L.H. Turn Adjustment
1. Turn steering wheel to the left until the boss
on the axle center touches the left stop
screw.
2. Verify the nearest point of contact of the ball
socket body with the air bellows support
assembly. Measure the distance between
those two points.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in