Opel Frontera UBS. Manual - part 227

POWER ASSISTED BRAKE SYSTEM  5C – 53

DISASSEMBLY

1. Guide Bolt

2. Lock Bolt

3. Dust Boot; Guide Bolt and Lock Bolt

4. Dust Boot Ring

•

Using a small screwdriver, remove the dust boot
ring.

REBUILDING THE CALIPER

4

6

5

7

3

8

3

2

1

9

Disassembly Steps

1.

Guide bolt

2.

Lock bolt

3.

Dust boot; guide bolt and lock bolt

4.

Dust boot ring

5.

Piston

6.

Dust boot; piston

7.

Piston seal

8.

Bleeder with cap

9.

Caliper body

Reassembly Steps

9.

Caliper body

8.

Bleeder with cap

7.

Piston seal

5.

Piston

6.

Dust boot; piston

4.

Dust boot ring

3.

Dust boot; guide bolt and lock bolt

2.

Lock bolt

1.

Guide bolt

5C – 54 POWER ASSISTED BRAKE SYSTEM

5. Piston

•

Insert a block of wood into the caliper and force
out the piston by blowing compressed air into the
caliper at the flexible hose attachment. This
procedure must be done prior to removal of dust
boot.

WARNING:
DO NOT PLACE YOUR FINGERS IN FRONT OF THE
PISTON IN AN ATTEMPT TO CATCH OR PROTECT IT
WHEN APPLYING COMPRESSED AIR. THIS COULD
RESULT IN PERSONAL INJURY.

CAUTION:
Use just enough air to ease the piston out of the
bore. If the piston is blown out, it may be damaged.

6. Dust Boot; Piston

7. Piston Seal

8. Bleeder with Cap

9. Caliper Body

REASSEMBLY

9. Caliper Body

8. Bleeder with Cap

Bleeder Torque

N·m (kg·cm / lb·in)

8 (80 / 69)

7. Piston Seal

•

Apply special rubber grease to the piston seal and
cylinder wall, then insert the piston seal into the
cylinder. The special rubber grease is included in
the repair kit.

INSPECTION AND REPAIR

Make necessary parts replacement, if wear, damage,
corrosion or any other abnormal conditions are found
through inspection.
Check the following parts;

•

Rotor

•

Cylinder body

•

Cylinder bore

•

Piston

•

Guide bolt, Lock bolt

•

Support bracket

NOTE:
The piston seal, boot ring and dust boot are to be
replaced each time the caliper is overhauled.
Discard these used rubber parts and replace with
new ones.

5. Piston

POWER ASSISTED BRAKE SYSTEM  5C – 55

6. Dust Boot; Piston

•

When inserting the piston into the cylinder, use
finger pressure only. Do not use a mallet or other
impact tools, since damage to the cylinder wall or
piston seal can result.

4. Dust Boot Ring

•

Apply special grease (Approx. 1 g) to the piston
and attach the dust boot to the piston and caliper.
Insert the dust boot ring into the dust boot.

3. Dust Boot; Guide Bolt and Lock Bolt

2, 1. Lock Bolt and Guide Bolt

Lock and Guide Bolt Torque

N·m (kg·m / lb·ft)

74 (7.5 / 54)

•

Install the dust boot on the support bracket after
applying special grease (Approx. 1 g) onto the
dust boot inner surface. Also apply special grease
onto the lock bolt and guide bolt setting hole of
the support bracket.

5C – 56 POWER ASSISTED BRAKE SYSTEM

REAR DISC BRAKE

BRAKE PADS REPLACEMENT

1

5

5

3

2

4

Removal Steps

1.

Wheel and tire assembly

2.

Lock bolt

3.

Caliper assembly

4.

Pad assembly with shim

5.

Clip

Installation Steps

To install, follow the removal steps in the
reverse order.

REMOVAL

NOTE:
If a squealing noise occurs from the rear brake while
driving, check the pad wear indicator plate. If the
indicator plate contacts the rotor, the disc pad
assembly should be replaced.
1) Draw out two-thirds of the brake fluid from the

reservoir.

2) Raise the vehicle and support it with suitable

safety stands.

1. Wheel and Tire Assembly

•

Refer to Wheels and Tires in Suspension section.

2. Lock Bolt