PREVOST X3-45 Multiplex, Руководство по обслуживанию

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Section 14: STEERING
PA1562
11
11. PITMAN ARM
11.1 REMOVAL
1. Remove cotter pin, nut and washers 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 (hammer in) pitman arm on or off
pitman 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 linkages.
FIGURE 15: PITMAN ARM ADJUSTMENT
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3. Using a cold chisel, undo punch mark that
locks fixing nut to the pitman arm.
4. Remove pitman arm fixing nut.
5. Check the radial position of the pitman arm in
relation to the sector shaft prior to removal of
pitman arm.
8. Add reference marks to the arm and shaft if
necessary to ensure correct alignment at
reassembly.
7. You must use a puller to remove pitman arm.
11.2 INSTALLATION
1. Position pitman arm on sector gear shaft with
reference marks aligned.
2. Install fixing nut (Prévost #661050). Tighten
nut to 470-570 lbf-ft (637-773 Nm).
NOTE
Use a new nut if the previously removed nut
was punched.
3. Lock nut with sector shaft using a punch mark
into the groove (Refer to figure 16).
FIGURE 16: FIXING NUT PUNCH MARK
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4. Connect drag link to pitman arm while
ensuring that rubber stabilizer is in place on
the rod end. Install washers. Tighten nut to
160-215 lbf-ft (220-290 Nm). Afterwards,
install a new cotter pin.
CAUTION
Input shaft marks must be aligned before
adjusting pitman arm.
11.3 ADJUSTMENT
1. Disconnect the drag link from pitman arm.
Center steering wheel by dividing the total
number of steering wheel turns in two. Scribe
a reference mark on steering gearbox at the
center previously determined.
2. Using a protractor, check the angle of the
pitman arm (refer to Fig. 15 for details).
3. The pitman arm should be adjusted to an
angle of 2.5º in relation with the vertical axis
(towards front of vehicle). If not, unscrew and
remove fixing nut. Remove the pitman arm
according to the procedure outlined under