Hydraulic unit pressure switch (ABS) - removal and refitting

Note: To remove the pressure switch from the hydraulic unit in situ, Ford tool No 12-008 or a locally made equivalent will be required. The switch may be removed without special tools after removing the hydraulic unit complete or the pump above. A new O-ring must be used when refitting the switch.

Caution: Refer to the
precautions in Section 1.

Removal
1 Disconnect the battery negative lead.

2 Depressurise the hydraulic system by pumping the brake pedal at least 20 times, or until it becomes hard.

3 Disconnect the multi-plug from the switch, then unscrew and remove the switch.

Refitting
4 Refit the switch using a new O-ring.

Position the plastic sleeve so that the drain hole faces the pump motor, then tighten the switch (see illustration).

19.4 Refit the pressure switch with the drain hole (arrowed) in the plastic
19.4 Refit the pressure switch with the drain hole (arrowed) in the plastic sleeve facing the pump motor - ABS

5 Reconnect the multi-plug and the battery.

6 On completion, bleed the complete hydraulic system and check for leaks around all disturbed components.

    See also:

    Routine maintenance and servicing
    Ford Sierra maintenance schedule The maintenance intervals in this manual are provided with the assumption that you will be carrying out the work yourself. These are the minimum maintenance interv ...

    Minor body damage - repair
    Repair of minor scratches in bodywork If the scratch is very superficial, and does not penetrate to the metal of the bodywork, repair is very simple. Lightly rub the area of the scratch with a pa ...

    Pressure regulating valve (Saloon and Estate models) - removal and refitting
    1 The brake pressure regulating valve is located within the engine compartment, just above the aperture in the wing inner panel through which the steering tie-rod passes. On pre-1986 models the va ...