Mustang GT V8-4.6L SOHC VIN X (1998)
Hydraulic Brake Booster: Component Tests and General Diagnostics
Possible sources of leakage from the hydro-boost power brake booster are:
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input seal
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power piston seal (through drain hole located on underside of hydro-boost power brake booster)
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housing seal
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spool plug seal
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accumulator cap seal
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tube port fitting
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relief valve
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bleed screw
