Dacia Pick-Up 1304/1305/1307. Service manual - part 91

36

STEERING ASSEMBLY

Tighten the lower nut (A) of the cardan.
Rotate the steering wheel to the left or to the right and tighten the lower nut (B) of the

cardan.

When the steering gear is in the central point (the wheels in straight line), one of the

ends of the cardan screws should be oriented upwards.

Mount:

- the lights control switch;
- the steering wheel;
- the lower half casing;
- the ignition/starting contact.

R

EMO UNTING

Place an old lower bushing, with the diameter  diminished by  2mm, under  the new

lower bushing(1).

Push the steering wheel shaft (3) upwards until the lower bushing gets in its seat.
Push downwards the steering wheel shaft and recover the old bushing.
Mount the new upper bushing (2) by means of a pipe.
Check the correct positioning of the bushings in their respective seats.
Mount the safety ring (4) of the upper bushing.
Bring the steering gear to its central point.

STEERING WHEEL SHAFT BUSHING

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1

3

2

4

4

STEERING ASSEMBLY

36

STEERING GEAR SHAFT

 D

ISMO UNTING

Disconnect the battery.
Dismount:

- the lower half casing;
- the steering wheel;
- the lights control switch;
- the turn lights relay.

Disconnect the stop lamp switch and  the

ignition/starting contact.

Dismount:

- the steering cardan;
- the servo brake attachment nuts;
- the servo brake.

Disconnect:

- the brake pedal pushing rod and the

clutch cable.

Unscrew the two attachment nuts of the

steering column and dismount the column.

REPAIR

Check the parts; steering wheel shaft, steering wheel shaft bushing, steering column.
Replace the defective or worn parts.

R

EMO UNTING

It shall be performed in the reverse order

as to the dismounting.

Tighten at the moment the  steering cardan

nuts.

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37

MECHANICAL ELEMENTS CONTROLS

   DOUBLE BRAKE PUMP WITH PRESSURE DROP INDICATOR ( ICP ) INCLUDED

C

O MPO NENTS

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

T

IGH TENING

 

MO MENTS

 ( daNm

 )

The hydraulic ducts guides

     1,4

The attachment nuts brake pump with servobrake          1,3

37 - 1

1

2

4

8

7

6

5

3

MECHANICAL ELEMENTS CONTROLS

37

PRIMARY CIRCUIT – PRESSURE LOOSING

Lack of pressure in the primary circuit leads to the following situation:
The primary piston advances up to the pin, so it controls mechanically the secondary

piston.. The secondary piston reaches a fluid pressure that shall operate on the piston –
linings assembly moving it to the right, opening also the second exit of the rear circuit
(the by-pass circuit) increasing the pressure in this circuit.

In this moment, by means of the transducer, the warning light on the instrument panel is

on.

SECONDARY CIRCUIT – PRESSURE LOOSING

Both cylinder pistons go on. The caliper cylinders of the front brake shall normally

operate.

The secondary piston reaches its respective pin, but the pressure will decrease (due to

the failure).

BRAKE PUMP DISMOUNTING

Drain the brake fluid reservoir.
Disconnect the pump from the  ICP transducer.
Dismount the four pipes from central

pump.

Unscrew the attachment nuts of the pump

on the servobrake.

Dismount the pump.

BRAKE PUMP REMONUTING

Before remounting, check the stroke of the servobrake push rod to be min. 30 mm.
Mount the brake pump on the servobrake, performing the dismounting operations in

reverse order.

After assembling with the brake fluid reservoir and fluid filling, no leakage must occur

in the surface of separation between the two elements.

VERY IMPORTANT : The I.C.P. transducer is mounted after the braking system

purging. The tightening moment = 2daNm. ICP  sub-assembly is not reparable (ICP –
pressure decreasing indicator)

BRAKE PUMP

37 - 2