Opel Frontera UBS. Manual - part 231

5D – 2 PARKING BRAKES

MAIN DATA AND SPECIFICATIONS

REAR PARKING BRAKE

Type

Duo-servo

Lining Dimensions

cm

2

(in

2

)

121.2 (18.79)

Adjusting Method

Manual Adjusting

Rear Drum (in Disc)
Inside Diameter

mm (in)

210 (8.27)

Parking Brake Lever Stroke

6 to 7 notches

When pulled with a force of 30 kg (66 lb)

SERVICE STANDARD

REAR PARKING BRAKE

Rear Drum (in Disc) Minimum Wear

Inside Diameter

mm (in)

211.4 (8.32)

Parking Brake Lining Thickness

Minimum Limit

mm (in)

1.0 (0.039)

Parking Brake Lever Stroke

6 to 7 notches

When pulled with a force of 30 kg (66 lb)

PARKING BRAKES  5D – 3

REAR DRUM (IN DISC) INSIDE
DIAMETER CHECK

Check the rear drum inside diameter by measuring at
more than two portions as shown in the figure.
If the inside diameter is greater than the limit, replace
the rear rotor.

Rear Drum Inside Diameter

mm (in)

Standard

Limit

210.0 (8.27)

211.4 (8.32)

PARKING BRAKE LINING INSPECTION

Check the shoe assemblies for wear by removing the
brake drum rotor.
Replace the shoe assemblies, if the lining thickness is
less than 1.0 mm (0.039 in).

Minimum Limit

mm (in)

1.0 (0.039)

PARKING BRAKE ADJUSTMENT

1. Adjustment of Parking Brake Assembly

•

Prior to lever stroke adjustment, adjust the rear
brake shoe/rotor (drum) gap. Perform this
procedure by loosening the adjust nut of the
equalizer.

a) Remove the adjusting hole plug (rubber) and

turn the shoe adjusting screw downward with
a small screwdriver so that shoes will expand
until they get into close touch with the rotor.
(Turn down the adjusting screw notch by
notch until the rotor does not turn.)

b) Turn the adjusting screw in the opposite

direction (upward) until the rotor can be turned
lightly. Standard number of notches to turn
upward: 7 or 8.
Turn the rotor and make sure that there is no
brake dragging.

T

t

SERVICING

5D – 4 PARKING BRAKES

2. Adjustment of Parking Brake Cable

a) Turn the equalizer nut so that the parking

brake lever travels 6 or 7 notches when pulled
up with a force of 30 kg (66 lb).

b) Make sure there is no brake dragging and

tighten the cable lock nut.

Cable Lock Nut Torque

N·m (kg·cm/lb·in)

6 (60 / 52)

3. Break-in of Parking Brake Shoe

•

When poor braking effect possibly resulting
from insufficient break-in is felt, or just after
replacement of parking brake shoe, be sure to
conduct break-in by driving vehicle as follows:

a) Forward 50 km/h (30 mph) x 400 m (About 30

seconds) with a lever pull force of 15 kg (33 lb),
and

b) Backward 10 km/h (6 mph) x 50 m (18 seconds)

with a lever pull force of 15kg (33 lb).

NOTE:
Break-in procedure must be performed under the
safety conditions and traffic rules.

•

If braking effect still remains poor after the
above break-in, wait for some time until
parking brake shoe cools down and repeat the
procedures a) and b) notes above.

•

On completion of break-in, inspect parking
brake lever stroke, and if the lever does not
come within the specified number of notches
when pulled up, readjust.

•

Excessive break-in may cause premature wear
of the parking brake lining.

PARKING BRAKES  5D – 5

FIXING TORQUE

N·m (kg·m/lb·ft)

15(150/130)

6(60/52)

6.5(65/58)

6.5(65/58)

6.5(65/58)

15(150/130)

6(60/52)

15(150/130)

7.8(78/67)

7.8(78/67)

A

B

A

B

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