PREVOST H3-41 Maintenance Manual page 440

SECTION 12: BRAKE AND AIR SYSTEM
FIGURE 35: TURN
ANTICLOCKWISE
15. As a visual aid, position a ring spanner or
socket onto the adjuster (including Adapt-
er (61)) as shown. Apply the brakes 5 to
10 times, the spanner or socket should
turn clockwise (viewed from actuator side)
in small increments if the adapter is func-
tioning correctly (see Figure 35 and note
below).
Note: As the number of applications increases,
incremental movement of the ring-spanner or
socket will decrease.
If the spanner or socket does not turn or turns
only with the first application or turns forward
and backward with every application, the
automatic adjuster has failed and the caliper
must be replaced.
FIGURE 36: APPLY THE BRAKE 5-10 TIMES, SPANNER
TURNS CLOCKWISE
16. If necessary, clean the contact area of the
cap. Lightly grease the contact surface of
the cap with white grease. The tag of the
adjuster cap (37) should be positioned as
shown by the arrow in the adjacent figure.
36 PA1621 Maintenance Manual All Series | Revised June 2020
ADAPTER 3 CLICKS
This ensures access is maintained for
subsequent removal (see Figure 36).
Note: A new adjuster cap (37) should be fitted
even if the brake pads are not being replaced.
FIGURE 37: TAB POSITIONING OF THE CAP
If the air gap is smaller than 0.023 in / 0.6
mm, the parameters and functions must be
checked as follows:
17. Check functioning of the brake actuator.
18. Remove brake actuator.
19. Check position of the lever (19) inside the
caliper in its released state (see arrow).
FIGURE 38: CHECK LEVER POSITION
20. Remove brake pads (12). If necessary,
remove dirt from brake pads, caliper and
carrier.
-Check brake pads for wear from the tappets
and if necessary replace brake pads.
- Check for abnormal wear of the contact areas
of the carrier. If necessary, replace the carrier.