Ford Sierra Manual

Brake hydraulic fluid renewal (Every 36 000 miles (60 000 km) or 3 years)
Routine maintenance and servicing / Brake hydraulic fluid renewal (Every 36 000 miles (60 000 km) or 3 years)


1 An assistant and bleeding equipment will be needed. A considerable quantity of hydraulic fluid will be required - probably about 2 litres (nearly half a gallon).

2 Slacken the front wheel nuts. Raise and support the front of the vehicle and remove the front wheels.

3 Remove the hydraulic fluid reservoir cap.

4 Open both front bleed screws one full turn.

Attach one bleed tube to each screw, placing the free end of each tube in a jar.

5 Pump the brake pedal to expel fluid from the bleed screws. Pause after each upstroke to allow the master cylinder to refill.

6 When air emerges from both bleed screws, stop pumping. Detach the left-hand caliper without disconnecting it and remove the inboard brake pad.

7 Depress the caliper piston, using a purpose-made tool or a blunt item such as a tyre lever, to force more fluid out of the caliper. Hold the piston depressed and have the assistant pump the pedal until air emerges from the bleed screw again.

8 Tighten the bleed screw on the left-hand caliper. Loosely refit the caliper and pad so that the piston is not accidentally ejected.

9 Repeat the purging operation on the righthand caliper, but do not refit it or tighten the bleed screw yet.

10 Fill the reservoir with fresh hydraulic fluid.

Position the bleed jar for the right-hand caliper at least 300 mm (1 foot) above the level of the bleed screw.

11 Have the assistant pump the brake pedal until fluid free of bubbles emerges from the bleed screw. Tighten the bleed screw at the end of a downstroke.

12 Place a piece of wood in the caliper jaws to limit piston travel. Keep your fingers clear of the piston. Have the assistant depress the brake pedal gently in order to move the caliper piston out.

13 With the pedal held depressed, slacken the bleed screw on the right-hand caliper and again depress the piston. Tighten the bleed screw when the piston is retracted. The pedal can now be released.

14 Disconnect the bleed tube. Refit the righthand brake pad and caliper.

15 Remove the left-hand caliper and inboard pad again. Carry out the operations described in paragraphs 10 to 14 on the left-hand caliper.

16 Bleed the rear brakes (Chapter 10).

17 Refit the front wheels, lower the vehicle and tighten the wheel nuts.

18 Pump the brake pedal to bring the pads up to the discs, then make a final check of the hydraulic fluid level. Top-up and refit the reservoir cap.


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