Opel Frontera UBS. Manual - part 222
POWER ASSISTED BRAKE SYSTEM 5C – 33
2. Check the rear wheel cylinder fluid pressure.
Install the pressure gauge on bleeder screws on
the front and rear brakes.
a. Depress the brake pedal slowly until the front
wheel cylinder fluid pressure reaches 7845 kPa
(80 kg/cm
2
/ 114 psi)
Note:
• The brake pedal should be depressed
gradually until specified pressure is reached
without pumping or adjusting foot pressure.
• If the front wheel cylinder fluid pressure rises
abobe 7845 kPa (80 kg/cm
2
/ 114 psi), release
the pedal fully, then depress the pedal again.
b. Hold the front wheel cylinder fluid pressure at
7845 kPa (80 kg/cm
2
/ 114 psi) for 2 seconds,
check the rear wheel cylinder fluid pressure.
Rear wheel cylinder
fluid pressure
kPa (kg/cm
2
/ psi)
6374±539 (65±5.5 / 924±78)
c. If the rear wheel cylinder fluid pressure is not
within the specified range, adjust the fluid
pressure.
3. Adjust the rear wheel cylinder fluid pressure.
The fluid pressure can be adjusted by the bolt
projection (1) or bolt projection (2).
a. If the fluid pressure is lower than specified
range, increase the dimention (1) or (2).
b. If the fluid pressure is higher than the specified
range, decrease the dimention (1) or (2).
Reference:
Dimention (1): The fluid pressure can be
adjusted about 196 kPa (2
kg/cm
2
/ 28 psi) by one turning
of the nut.
Dimention (2): The fluid pressure can be
adjusted about 98 kPa (1 kg/cm
2
/ 14 psi) by sliding the bolt
position (per 1 mm / 0.039 in).
4. Check the rear wheel cylinder fluid pressure.
If the rear wheel cylinder fluid pressure is not
within the specified range, try the adjustment
again.
5. Bleed the brake hydraulic line and check the fluid
leak.
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C05RW023