Dacia Solenza (engine E7J). Service manual — part 88
THE MECHANICAL ELEMENTS CONTROLS
37
37 - 2
Brake pump
REMOUNTING
Perform the dismounting operations in reverse order.
Check the length of servobrake the pushing rod , value X=9
-0,2
mm
and correct it if necessary.
After assembling the brake pump with the fluid reservoir and filling with brake fluid, no leakage
must occur in the surface of separation between the two elements.
IMPORTANT :
The I.C.P. transducer is mounted after the braking system purging.
ICP sub-assembly is not reparable
REMARK :
In case of failure of one of the braking system elements, proceed as follows:
- dismount ICP transducer;
- repair the failure;
- purge the braking circuit;
- mount the ICP transducer.
THE MECHANICAL ELEMENTS CONTROLS
37
37 - 3
MASTER VAC 7 " SERVO MECHANISM
The ” Master-Vac 7" servobrake is a brake booster destined to reduce the driver’s effort on
the brake pedal.
ATTENTION !
The servobrake cannot be repaired.
The only items of the servobrake which are to be replaced are the air filter and the retainer
valve.
DISMOUNTING
Disconnect the battery.
Drain the brake fluid reservoir.
Servobrake
OBSERVATION :
In case one circuit is damaged, the pedal stroke shall be longer, the braking being
done only by the circuit still working.
TIGHTENING MOMENTS (daNm)
Brake pump attachment nut on servobrake
1.7
Servobrake attachment nut on cowl panel
1.7
THE MECHANICAL ELEMENTS CONTROLS
37
37 - 4
REMOUNTING
Before remounting, check: and if necessary,
perform the following adjustments:
Detach the connection screws of the rigid
brake ducts from the main brake pump.
Disconnect the electrical contact from ICP
transducer.
Dismount the main pump from the
servobrake.
Disconnect the suction hose off the
servobrake.
Servobrake
Dismount :
- the connecting shaft (1) between the
coupling fork and the pedal ;
- the attachment nuts of the servobrake
on cowl panel.
Dismount the servobrake .
1. The adjustment of the exit rod (P1) ( brake
pump side) which is obtained by acting on the
nut which is one with the pushing rod, in order to
obtain value X = 9
-0.2
mm.
This value is measured between the pushing rod
end and the rest surface of the main cylinder on
servobrake.
2. The adjustment of the pushing rod (P2)
( brake pedal side) in order to obtain the value
L = 107.7
-0.5
mm , which is obtained as follows:
- unscrew the lock nut E and by;
- act on the coupling fork (C) until
obtaining the value L = 107.7
-0.5
mm;
- lock the lock nut (E).
The L value, is to be measured between the
axle of the coupling fork whole and the
servobrake rest surface on cowl panel.
For remounting, perform the dismounting
operations in the reverse order.
Dismount the ICP transducer from the brake
pump.
Purge the brake circuit.
Mount the I.C.P. transducer
Mount the electric connector the I.C.P.
transducer.
1
P 2
THE MECHANICAL ELEMENTS CONTROLS
37
37 - 5
ATTENTION !
The tightness of the servobrake is checked on the vehicle, with the hydraulic cir-
cuit under operation
Connect the vacuum meter between the servobrake and the inlet manifold by means of a “
T ” type connector.
The connecting hose of the vacuum meter shall be as long as possible.
Start the engine and let it idle run for 1min.
Block the air suction hose by means of the MOT 453 device.
Stop the engine.
If air suction lowers with more than 33 mbar (25 mm Hg) in a 15 seconds period, it means
there is a loss at the retainer valve (replace the valve) or at the servobrake membrane (replace
the servobrake).
Dismount the MOT 453 device.
Dismount the vacuum hose.
Reinstate the connection between the servobrake and the inlet manifold by means of
the vacuum hose.
TIGHTNESS CHECKING
Servobrake
SPECIAL TOOLS
MOT 453
Obturator
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