PREVOST X3-45 COMMUTER, Руководство по обслуживанию

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SECTION 10: FRONT AXLE
10 DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
When setting toe-in adjustment, the front
suspension must be neutralized; that is, all
component parts must be in the same relative
position when marking the adjustment as they
will be when in operation.
To neutralize the suspension, the vehicle must
be rolled forward, approximately ten feet.
FIGURE 5: TOE-IN MEASUREMENTS
10032
For toe-in specifications, refer to paragraph 8
‘’Specifications’’ in this section.
By rolling the vehicle forward, all tolerances in
the front suspension are taken up and the
suspension is then in its normal operating
position. Neutralizing the front suspension is
extremely important, especially if the vehicle has
been jacked up in order to mark the tires.
Otherwise, the front wheels will not return to
their normal operating position due to the tires
gripping the floor surface when the vehicle jack
is lowered.
NOTE
‘’Toe-in’’ measurements must be taken at the
horizontal axis of the wheel centerline.
6.8.1 Inspection and Adjustment
Before checking front wheel toe-in, first check the camber angles and make the necessary corrections.
1. Measure the toe-in.
2. If the toe-in measurement is not within the specified tolerance, carry out the following procedure :
a. Loosen the pinch bolt nuts and bolts on each tie rod end.
b. Turn the tie rod until the specified toe-in measurement is obtained.
c. Tighten the pinch bolt nuts alternately and progressively to 65-75 lbf-ft (88-102 Nm), thus
securing all tie rod joints.
FRONT WHEEL ALIGNMENT SPECIFICATIONS
Front Wheel Alignment Minimal Nominal Maximal
Camber, (degrees)
R.H. and L.H.
*
-0.250 0.125 0.375
Caster, (degrees)
R.H. and L.H.
2 2.75 3.5
Toe-in (A minus B),
(degrees)
0.04 0.06 0.08
NOTE
Camber angle changes with loading. The given numbers are for an empty vehicle.