Repair Manual

37
MECHANICAL ELEMENTS CONTROLS
DOUBLE BRAKE PUMP WITH PRESSURE DROP INDICATOR ( ICP ) INCLUDED
C
OMPONENTS
1. Assembled primary piston with gaskets
2. Assembled secondary piston with
gaskets
3. Primary piston pin.
4. Secondary piston pin.
5. Primary piston return spring
6. Secondary piston return spring.
7. Purging screw
8. ICP transducer
A – A ICP assembly section
OPERATION
a) BRAKING
THE FRONT BRAKE CIRCUIT
The primary piston is controlled by the pushing rod. A part of the brake fluid under
pressure will operate together with the spring on the secondary piston, and the other part of
the brake fluid shall penetrate through the ducts to the upper floor towards both exits
leading to the front brake calipers.
THE FRONT BRAKE CIRCUIT
The secondary piston is continuing its movement, conducting the brake fluid under
pressure, through the ducts, to the upper floor, towards the exit to the pressure reducing
valve.
b) DE BRAKING
After effort ending, the two pistons resume their initial position under the effect of the
retainer springs, while the fluid is coming back and the pressure is decreasing in both
circuits.
BRAKE PUMP
TIGHTENING MOMENTS ( daNm )
The hydraulic ducts guides 1,4
The attachment nuts brake pump with servobrake 1,3
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