Dacia Solenza 2004, Repair Manual

Page: 279 / 891

GENERAL
30 - 10
30
Braking system diagnostic
I. CONSTANT EFFECT TO THE PEDAL
EFFECTS
Tough pedal:
High effort for small deceleration.
Elastic pedal
In order to diagnose, an incident where
the use was normal is to be analyzed and two
tests are to be performed:
1. While driving the vehicle :
Interpretation test: pedal stroke/ deceleration
rate.
2. While vehicle is stopped, engine cut.
Additional test of brake pedal press:
Perform five consecutive pressings on the
brake pedal in order to vacuum the
servobrake, before taking into consideration
the test result.
Long pedal
The test is to be performed with stopped
vehicle and cut engine.
REMARK:
I t is neces sary to perform five
consecutive pressings on the brake pedal,
in order to vacuum the servobrake before
taking into consideration the test result.
Floor pedal
The test is to be performed with stopped
vehicle and cut engine.
REMARK :
Perform five consecutive pressings on
the brake pedal, in order to vacuum the
servobrake before takin g into
consideration the test result.
POSSIBLE CAUSES
-
Assistance defect
-
Brake linings:
- greasy
- stacking to the disk ( non-conform )
- heating, prolonged braking with constant
pedal press
-
Stuck piston
- Rigid duct narrowed (flattening)
-
Air presence in the circuit:
defective purging
-
Internal leak in the braking circuit.
- Leak of fluid from reservoir (external fluid
leak from braking circuit).
Automatic adjustment : hand brake cable too
tighten.
- Important and asymmetric wear of the
brake linings
-
Stroke too ample between the servobrake
pushing rod and the brake pump
-
Brake fluid having high temperature.
- Hydraulic leak (check the sealing of the
braking system components)
- Sealing gaskets defects of the two brake
pump circuits.
- Brake fluid having high temperature
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