F 250 4WD LD Pickup V8-281 4.6L VIN W EFI (1997)
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Remove the brake master cylinder fluid control valve.
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If equipped, remove the brake pressure switch.
Remove Primary Piston Assembly
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Remove the primary piston assembly.
1
Depress the (A) primary piston and remove the (B) snap ring.
2
Remove and discard the primary piston assembly.
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Remove the secondary piston assembly.
1
Plug the rear outlet port and, if necessary, plug the brake pressure switch port.
2
Apply compressed air into the front outlet port and remove the secondary piston assembly and discard.
