PREVOST LE MIRAGE XLII BUS SHELLS, Руководство по обслуживанию

Страница: 375 / 1260

Section 12: BRAKE AND AIR SYSTEM
PA1564
17
CAUTION
Do not apply brakes while pads are removed
as this could cause over stroke damage to the
adjusting mechanism.
FIGURE 28: PAD REMOVAL
12111
25.1.5 Checking Pad Wear
Minimum friction material thickness is 2 mm (A,
Fig. 29)
New friction material has a thickness of 21 mm
(B, Fig. 29)
FIGURE 29: PAD WEAR
12112
25.1.6 Important Pad and Rotor Measurements
A = Rotor thickness (new): 45 mm;
B = Rotor thickness (worn): 37 mm. Requires
replacement;
C = Overall thickness of pad (new): 30 mm;
D = Backplate: 9 mm;
E = Minimum thickness of pad material: 2 mm;
F = Minimum allowed thickness of overall
backplate and friction material: 11 mm.
Replacement necessary .
FIGURE 30: ROTOR AND PAD WEAR LIMITS
12113
25.1.7 Checking Caliper Guidance and Seal
Condition
Perform sliding test. You must be able to slide
the caliper easily at any time. Sliding test should
be performed at least every three months or
more often depending on the type of operation.
Sliding Test (Refer to Fig. 31):
a) Using hand pressure only, the caliper (1)
must slide freely with its guide pin arrange-
ments (4-7) across a distance of 1 3/16 inch
(30 mm) when the pads are removed. The
sleeve (5) is sealed using the boot (9) and
the cap (10).
b) The rubber components (9 and 10) should
show no damage. The positioning must be
checked. If necessary the caliper has to be
repaired using the guide kit (part #611168)
or with the seal and guide kit (part
#611199). When repairing a caliper with the
above kits, make sure all parts in the kit are
used. Use special green grease (Prévost
#683344) to reassemble the slide pin into
the bushing, white or yellow grease (Prévost
#683345) may be used for all other lubrica-
tion needs.
c) Depending on caliper manufacturing date,
black paint may be present on the unsealed
pin (short pin). Paint on the slide pin can
prevent the caliper from sliding properly
especially when the pad starts to wear. If
paint is present on the pin, separate the pin
from the bushing, clean and reinstall the pin
according to procedure.