Dacia SuperNova (engine E7J). Service manual - part 71

33

REAR BEARING ELEMENTS

 BRAKE CYLINDER

TIGHTENING MOMENTS (daNm)

Wheel attachment screw

7.5

Rear wheel steering knuckle nut                       16
Purging screw                                                      1
Brake rigid piping connection screw

1.5

DISMOUNTING

With the vehicle placed on an elevator

with two columns, dismount:

- the wheel;
- the drum plug;
- brake drum;
- upper spring of shoes return, using

pliers FR03.

Space the brake shoes.

Unscrew:

- the rigid piping connection on the brake

cylinder by means of an open-end wrench;

- the two attachment screws of the

brake cylinder on the brake plate, loosen-
ing the connection.

Check the condition of the shoes brake gas-

kets; if oil traces are present, replace them.

REMOUNTING

Clean the drums and the brake shoes as-

sembly by means of a cleaner (vacuum
cleaner) for brake.

Perform in reverse order the dismounting

operations.

Purge the braking system (see chapter 38).

DENOMINATION

CODE

Dismounting pliers for shoes return spring

FR03

Plug extractor pliers

RO441

SPECIAL TOOLS

33 - 8

33

REAR BEARING ELEMENTS

 BRAKE CYLINDER

Adjust:

- the shoes, by applying a repeated pressure to the brake pedal;
- the rear axle bearing clearance.

Mount the wheel.
Lower the vehicle from the elevator.
Purge the braking system (see chapter 38).
Adjust the hand brake.

REPAIRING

DISMOUNTING

Dismount the brake cylinder off the vehicle;
Dismount:

- the purging screw;
- the protection bellows;

- the Ö22 pistons assembled with the pressure gaskets.

Check the condition of the cylinder boring, any trace of wear, oxidation or scratches

implies the replacement of the assembled brake cylinder.

If the cylinder components are in a good condition, lubricate them with brake fluid and

mount them in the reverse order of dismounting.

Check the easy moving of the assembled pistons in the cylinder boring.
Mount the brake cylinder on the plate;
Mount the wheel brake drum.
Check the adjustment of the hand brake.
Purge the braking system.

33 - 9

33

REAR BEARING ELEMENTS

BRAKE SHOES

DISMOUNTING

The replacement of brake shoes must

be performed in  complete set, never mount
the brake shoes equipped with brake
linings of different brands and qualities.

Dismount :

- the brake drum ( see the corre-

sponding paragraph);

- the two maintenance springs (R)

of the shoes with a brake cylinder rod (T).

By means of the pliers FR05A the brake

cylinder pistons are immobilized.

Remove the return upper spring of the

shoes using the pliers FR03.

Release the end of the hand brake cable

off the hand brake lever.

Swing the adjustment lever (C) up to the

moment it comes into contact with the rear
wheel steering knuckle.

Distance the shoes from the plate.

SPECIAL TOOLS

DENOMINATION

CODE

Plug extracting pliers

RO441

Dismounting pliers for shoes return spring

FR03

Pliers for maintaining brake cylinders pistons

FR05A

 

TIGHTENING MOMENTS (daNm)

Wheel screw

7.5

Rear wheel steering knuckle nut      16

33 - 10

33

REAR BEARING ELEMENTS

BRAKE SHOES

Dismount the auxiliary connecting rod (B)

connection from the adjustment lever (C).

Bring the adjustment lever in the initial

position.

Rotate the compression shoe with 90

degrees.

Dismount the lower spring.

Remove the (front) compression shoe, then

the tensioning one.

REMOUNTING

Perform in reverse order the dismounting
operations.

NOTE
The adjustment of the device for the
automatic clearance taking over, is
depending of the spring tensioning
caught between the rear shoe and the
auxiliary connecting rod.

Measure the value H=1mm, between the

auxiliary connecting rod and the front shoe.
If the value H is not correct, replace the
auxiliary connecting rod spring and the
shoes return springs.

33 - 11

C