Input Rod Seal
A fluid leak from the mounting bracket vent hole indicates a damaged input rod seal (6). Replace the hydraulic brake booster. Refer to Power Brake Booster Replacement .
Power Piston Seal
Damage to the power piston seal (4) causes fluid to leak at the common master cylinder brake booster vent and may cause a reduction in power assist. Replace the hydraulic brake booster. Refer to Power Brake Booster Replacement .
Housing Seal
A fluid leak between the two housings indicates a damaged housing seal (7). Replace the hydraulic brake booster. Refer to Power Brake Booster Replacement .
Relief Valve
Damage to the relief valve (2) caused fluid to leak past the relief valve. Replace the hydraulic brake booster. Refer to Power Brake Booster Replacement .
Spool Valve Plug Seal
Damage to the spool valve plug seal (3) causes fluid to leak past the plug. Replace the hydraulic brake booster. Refer to Power Brake Booster Replacement .
Accumulator Seal
Damage to the accumulator seal (5) causes fluid to leak past the accumulator cap. Replace the accumulator. Refer to Hydraulic Brake Booster Accumulator Replacement .
Return Port Fitting
Tighten the return port fitting (1) to 10 N·m (88 lb in).
