PREVOST H3-41 Maintenance Manual page 727

8. Fully close the damper while turning the dust
cap or piston rod slowly CCW until it is felt
that the cams of the adjusting nut engage in
the recesses of the foot valve assembly
(Figure 37).
NOTE
In figure 23, if there is an indentation (B) in the
dust cap (C) and the cover shows two holes
(A), the damper is fitted with a bump rubber
(D). If so, fully extend the damper and insert a
round bar or screwdriver through the holes.
Push the bump rubber down and remove.
Remove the split plastic collar (E) (if fitted)
from the piston rod.
9. The damper may have already been
adjusted. Therefore check whether the
damper is adjusted or not by keeping it
closed and gently turning further CCW,
counting at the same time the half-turns until
a stop is felt. Stop turning and do not force.
10. While keeping the damper closed, make two
CW half-turns. In case of prior adjustment,
add the number of half-turns previously
counted. The total range is about five half-
turns. Pull the damper out vertically without
turning for at least 3/8" (1cm) to disengage
the adjusting mechanism. The dust cap or
piston rod may now be turned freely.
11. The damper can now be refitted in the
vehicle.
FIGURE 37: DAMPER
NOTE
Where a bump rubber was installed, refit same
inside the dust cap and by fully closing the
damper, the rubber will seat again at top of the
dust cap. Refit the split plastic collar E (Figure
37).
12. Reinstall panels and R.H. entrance door
panel hinge cover.
• Entrance Door Panel Adjustments
Before attempting to correct any entrance door
operating problem by adjusting any part of the air
cylinder assembly, first perform the following
mechanical checks and procedure.
Check around the perimeter of the door for
binding. If any binding is found, adjust as follows:
o Horizontal and vertical adjustment
7. Support the door panel with a wooden block
and a hydraulic jack.
8. Unfasten the bolts fixing the door panel
plates. See figure 24
NOTE
Ask an assistant to help you to perform the
following adjustments.
9. Adjust the door horizontally and vertically
with the jack. Tighten the bolts. Remove the
jack and the wooden block.
FIGURE 38: DOOR PANEL ADJUSTMENTS
o Depth adjustment
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PA1621 Maintenance Manual All Series | Revised Sept 2019
SECTION 18b: X3 SERIES BODY
43