Opel Frontera UBS. Manual - part 220

POWER ASSISTED BRAKE SYSTEM  5C – 25

ON-VEHICLE SERVICE

BRAKE HOSE REPLACEMENT

1

2

4

2

3

1

2

4

5

3

Front/Rear Caliper Brake Hose

Removal Steps

1.

Brake pipe

2.

Clip 

3.

Bolt and gasket

4.

Hose

Installation Steps

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

Rear Axle Brake Hose

Removal Steps

1.

Brake pipe

2.

Clip 

3.

Brake pipe

4.

Bolt

5.

Hose

Installation Steps

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

5C – 26 POWER ASSISTED BRAKE SYSTEM

REMOVAL

Preparation:

1) Raise the vehicle and support it with suitable

safety stands.

2) Remove wheel and tire assembly.
3) Clean dirt, grease, and other foreign material off

the hose fittings at both ends.

Front/Rear Caliper Brake Hose

1. Brake Pipe

2. Clip

3. Bolt and Gasket

4. Hose

Rear Axle Brake Hose

1. Brake Pipe

2. Clip

3. Brake Pipe

4. Bolt

5. Hose

INSTALLATION

To install, follow the removal steps in the reverse
order, noting the following points. After installing the
brake hoses, bleed brakes as described in this
section.

Front/Rear Caliper Brake Hose
1. Tighten the brake pipes to the specified torque.

Brake Pipe Torque

N·m(kg·m/lb·ft)

16 (1.6 / 12)

2. Tighten the bolt to the specified torque.

Bolt Torque

N·m(kg·m/lb·ft)

35 (3.5 / 26)

NOTE:

•

Always use new copper gaskets.

•

Be sure to put the hooked edge of the flexible
hose end into the anti-rotation cavity.

Rear Axle Brake Hose
1. Tighten the brake pipes to the specified torque.

Brake Pipe Torque

N·m(kg·m/lb·ft)

16 (1.6 / 12)

2. Tighten the bolt to the specified torque.

Bolt Torque

N·m(kg·cm/lb·in)

13 (130 / 113)

POWER ASSISTED BRAKE SYSTEM  5C – 27

BRAKE PIPE REPLACEMENT

1

1

2

Removal Steps

1.

Brake pipe

2.

Plastic clip

Installation Steps

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

REMOVAL

Preparation:

1) Raise the vehicle and support it with suitable

safety stands.

2) Remove wheel and tire assembly as necessary.
3) Clean dirt, grease, and other foreign material off

the pipe fittings at both ends.

1. Brake Pipe

2. Plastic Clip

1

Vehice with  LSPV

5C – 28 POWER ASSISTED BRAKE SYSTEM

P & B (PROPORTIONING AND BYPASS) VALVE

Master cylinder
    (Primary)

Master cylinder
    (Secondary)

Rear brake

Front brake

INSTALLATION

To install, follow the removal steps in the reverse
order, noting the following points. After installing the
brake pipes, bleed brakes as described in this section.
1. Tighten the brake pipes to the specified torque.

Brake Pipe Torque

N·m(kg·m/lb·ft)

Master Cylinder Side

Others

12 (1.2/9)

16 (1.6/12)

The P & B valve contains two sections, each serving a
different function.
The proportioning section of the P & B valve
proportions outlet pressure to the rear brakes after a
predetermined rear input pressure has been reached.
This is done to prevent rear wheel lock-up on the
vehicles with light rear wheel loads.
The valve has a By-bass feature which assures full
system pressure to the rear brakes in the event of a
font brake mulfunction, also full front pressure is
retained in the event of rear brake mulfunction.
The P & B valve is not repairable and must be
replaced as a complete assembly.