Figure 121
Figure 122
Figure 123
49171
Through wrench (4), operate on clearance recovering device
in order to make small piston (1) go out of caliper body for
a maximum of 30 mm (dimension A).
Remove dust-guarding casing from caliper body and through
a suitable lever remove small pistons (1) together with
protection casings (3).
!
Dimension A must absolutely not be exceeded since
threaded barrels (2) are synchronised. If threaded
barrels (2) perform an overstroke, they lose their
synchronism and the brake caliper must be replaced.
Internal brake caliper parts must absolutely not be
disassembled.
Therefore do not loosen or disassemble cover check
screws.
Cleaning and check of component parts
For washing the metal parts, use an hot water solution with
Fiat LCD detergent.
By using a metal brush, remove dirt from caliper body, then
with a brush remove residuals and accurately clean guide pins
and sliding bushes seats.
Through a synthetic brush with adequate sizes, remove grease
residuals from sliding bushes seats.
Proceed with an accurate caliper body blowing through a
compressed air jet.
With a canvas drenched with isopropyl alcohol or the like,
accurately clean the sliding bushes.
Check wear conditions of sliding bushes and related seats on
brake caliper body, make sure that there are no wears or
damages on sliding surfaces.
Insert bushes in their seats, verify their regular sliding,
otherwise proceed with their replacement, or restoration, if
it is necessary, from seat on caliper body.
49172
Check wear conditions of braking gaskets check pins and
related safety springs; if they show distortions or wears,
replace the parts that are deteriorated.
It is advisable to replace all rubber and plastic parts and brass
bush, even if visually they do not show distortions or
deteriorations.
Assembly
Make sure that all brake caliper components are perfectly
clean; remove possible abrasive residuals with a canvas
without hairs, drenched with isopropyl alcohol or the like.
Through a suitable keyer, assemble small pistons (1) together
with protection casings (2).
Through a wrench (3) operate on clearance recovering device
in order to make small pistons (1) go back.
!
A regular braking very much depends on brake caliper
sliding on guide pins.
49173
Through a suitable beater, assemble brass bush (1).
E
URO
C
ARGO
T
ECTOR
12-26 t
PNEUMATIC SYSTEM - BRAKES
97
Base - February 2003