Opel Frontera UBS. Manual - part 230

 

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Opel Frontera UBS. Manual - part 230

 

 

POWER ASSISTED BRAKE SYSTEM  5C – 65

UNIT REPAIR

MASTER CYLINDER

The master cylinder is not repairable and must be
replaced as complete assembly if found defective.

INSPECTION

Excessive brake pedal travel, malfunction or dragging
brake suggests that the master cylinder is defective.
In such cases perform the following visual check.

Visual check
Make parts replacement as required if wear,
distortion, nicks, cuts, corrosion, or other abnormal
conditions are found through the following parts
inspection;

Master cylinder body

Fluid reservoir

O-ring

Primary piston

FUNCTIONAL INSPECTION OF MASTER
CYLINDER PISTON

Push the primary piston with your fingers to check
that it travels smoothly. If the motion is questionable,
replace the master cylinder as a complete assembly.

FUNCTIONAL INSPECTION OF MASTER
CYLINDER 

Inspect the master cylinder for function as follows. If
any abnormal function is found, replace with a new
one.
Primary piston holder: 5-8840-2306-0 (J-39242)
(including master cylinder attachment and master
cylinder plug)

Install the primary piston holder onto the master
cylinder with the spacer (2 bolts) with its adjusting
bolt screwed in up to the “0” line.

Master cylinder

Spacer

5-8840-2306-0

Primary piston holder

"0" line

"5" line

5C – 66 POWER ASSISTED BRAKE SYSTEM

Radiator cap tester: 5-8840-0277-0 (J-24460-01)

Connect master cylinder attachment with the end
of radiator cap tester, and apply air pressure with
the cap tester. Make sure there is no rise in
pressure and that with the adjusting bolt further
screwed in 5 mm (align the adjusting bolt to the
“5” line). There should be a pressure increase of
49 kpa (0.5 kg/cm

2

/7.1 psi) or more.

NOTE:
When checking the front (or primary) side, be sure to
mount master cylinder plug in the rear (or secondary)
port.

NOTE:
1) Do not use an air compressor, as the air from

compressor is mixed with compressor oil.

2) When installing the master cylinder onto the

vacuum booster, always adjust vacuum booster
push rod. (Refer to Vacuum Booster Assembly in
this section.)

3) After the master cylinder is installed onto the

vehicle, check for leakage, pedal travel and pedal
free play.

Master cylinder
plug

Master cylinder attachment

5-8840-0277-0

Radiator cap tester

5-8840-2306-0

“0” line

“5” line

Apply air

No pressure

Pressure

pressure to

rise.

increase of

the front and

49 kpa (0.5 kg/cm

2

/

rear ports

7.1 psi) more

Remarks

Check port into

Checks air

the atmospheric

tightness of the

pressure

pressure

chamber

chamber

POWER ASSISTED BRAKE SYSTEM  5C – 67

VACUUM BOOSTER

The vacuum booster cannot be disassembled for
repair. Replace a defective vacuum booster with a
new one.

PARKING BRAKES  5D – 1

SECTION 5D

PARKING BRAKES

CONTENTS

PAGE

Service Precaution ............................................................................................................. 5D- 1

Main Data and Specifications ........................................................................................... 5D- 2

Service Standard................................................................................................................ 5D-  2

Servicing ............................................................................................................................. 5D-  3

Fixing Torque...................................................................................................................... 5D-  5

General Description ........................................................................................................... 5D-  6

On-Vehicle Service ............................................................................................................. 5D-  7

Parking Brake Lever Replacement ............................................................................... 5D-  7

Parking Brake Cable ...................................................................................................... 5D-  9

SERVICE PRECAUTION

WARNING: 
IF SO EQUIPPED WITH A SUPPLEMENTAL RESTRAINT SYSTEM (SRS), REFER TO THE SRS COMPONENT
AND WIRING LOCATION VIEW IN ORDER TO DETERMINE WHETHER YOU ARE PERFORMING SERVICE ON
OR NEAR THE SRS COMPONENTS OR THE SRS WIRING. WHEN YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS WIRING, REFER TO THE SRS SERVICE INFORMATION.
FAILURE TO FOLLOW WARNINGS COULD RESULT IN POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.

CAUTION:
Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact
part number for that application. ISUZU will call out those fasteners that require a replacement after
removal. ISUZU will also call out the fasteners that require thread lockers or thread sealant. UNLESS
OTHERWISE SPECIFIED, do not use supplemental coatings (Paints, greases, or other corrosion inhibitors)
on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener
torque and the joint clamping force, and may damage the fastener. When you install fasteners, use the
correct tightening sequence and specification. Following these instructions can help you avoid damage to
parts and systems.

SECTION

 

 

 

 

 

 

 

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