Taurus L4-153 2.5L HSC (1986)
Brake Proportioning/Combination Valve: Description and Operation
Fig. 8 Combination Valve
Fig. 9 Diagonally Split System Combination Valve
The combination valve, Fig. 8, is a metering valve, failure warning switch, and a proportioner in one assembly and is used on disc brake applications.
The metering valve delays front disc braking until the rear drum brake shoes contact the drum. The failure warning switch is actuated in event of front or
rear brake system failure, in turn activating a dash warning lamp. The proportioner balances front to rear braking action during rapid deceleration.
Combination valves used on diagonally split brake systems do not use metering valves and use two proportioning valves, Fig. 9.
Fig. 11 Metering Valve, Continued Braking