Dacia Solenza (engine E7J). 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

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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