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
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