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Check brake pedal travel with, and without, engine running to verify proper power booster operation.

Vacuum Power Brake Booster Test

Microsoft Word version

Fillable PDF version

Identify components of the brake power assist system (vacuum/ hydraulic/electric).

Vacuum Supply/Manifold or Auxiliary Pump

Microsoft Word version

Fillable PDF version

Inspect vacuum-type power booster unit for leaks; inspect the check-valve for proper operation; check vacuum supply (manifold or auxiliary pump) to vacuum-type power booster; determine needed action.

Inspect and test hydraulically assisted power brake system for leaks and proper operation; determine needed action.

Inspect electric power booster unit; determine needed action.

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