30
GENERAL
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BRAKING SYSTEM DIAGNOSTIC
II.
CONSTANT EFFECT AT BEHAVIOUR
EFFECTS
Brakes not accomplishing the
required braking distance
Vibrating brakes
When braking, the vehicle ( front
p art) is left/right deviating
Braking
Heating brakes POSSIBLE CAUSES
- No n- un if o rm wo rn brake lin ings
(backing off);
- Brake linings slightly greased;
- Springs with modified characteristics.
- Brake disks with high wobbling;
- Inconstancy brake disks width;
- Particles abnormal deposit on brake disks
(oxidation between linings and disk).
- Front axl e suspension, steering (to be
checked);
- Stuck piston;
- Tires – wear, inflati on pressure;
- Rigid duct narrowed (flattening).
- Stuck piston;
Automatic adjustment : hand brake cable very
tighten.
REMARK :
Automatic recovering is performed by
means of the brake pedal, if there is no ab-
no rm al t ensi on in the hand brake cable
when released (hand brake released).
- Return spring.
- Insufficient hydraulic stroke of the brake
pump, not allowing the return at rest of
the brak e pump pistons ( brake pump
remaining under pressure);
- Stuck pistons or hardly returning;
- Rigid duct narrowed (flattening);
- Def ective adjustment of the hand brake
control.
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WHEELS AND TYRES
CARACTERISTICSRIMS – TIRES
The wheels screws tightening moment : 7,5 daNm.
The inflating pressure must be checked at cold.
The temperature raising during driving, leads to a pressure increase from 0.2.
to 0.3 bars. In case temperature checking is done at warm, take i nto account this pressure increase and
never deflate it. A
ir filling pressure
(barr) at cold
Vehi cle Rim T i res Front Rear
R52315 5,5 B13 165/70R13 1,9 2,0
5,5 J13 165/70R13
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