PREVOST X3-45 COMMUTER, Руководство по обслуживанию

Страница: 254 / 549

SECTION 10: FRONT AXLE
8 DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
Proceed with the following method to check the
steering maximum turning angle :
6.4.1 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 location
on the axle center (refer to section 14
“Steering”).
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.
6.4.2 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.
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. Check the stroke of the steering stabilizer
cylinder (damper). It should not exceed
12.59 inches (320 mm).
5. This must be done for a full left turn.
6. 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.
NOTE
If steering angle stoppers are changed, a
special procedure is required for readjusting
gearbox steering limiter. See paragraph 6.5
‘’Hydraulic Stop’’ in this section.
6.5 HYDRAULIC STOP
NOTE
Before steering limiter readjustment, verify
vehicle wheel alignment and ensure that oil
level is checked and that air bleeding is done.
Refer to “ZF-Servocom Repair Manual’’ annexed
at the end of Section 14 ‘’Steering’’ under
heading ‘Setting and Functional Test.
6.6 FRONT WHEEL CAMBER
Wheel camber is the number of degrees the top
of the wheel tilts outward (positive) or inward
(negative) from a vertical angle (Figure 3).
The camber angle is not adjustable. Camber
variations may be caused by wear at the wheel
bearings, steering knuckle pins or by a bent
knuckle or sagging axle center. Steering effort is
affected by improper camber, and uneven tire
wear will result. Excessive positive camber
causes an irregular wear of tire at the outer
shoulder and excessive negative camber causes
wear at the inner shoulder.