Expedition 2WD V8-281 4.6L SOHC (1998)
Brake Caliper: Description and Operation
The disc brake caliper:
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is a pin slider, dual piston type.
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has two caliper pistons.
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housing has a fluid inlet at the center of the bore. A square section seal fitted into an annular groove in the caliper cylinder bore seals against
hydraulic pressure, while rubber boots seal the caliper pistons and caliper bore from contamination.