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Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> BENDIX - Hydraulic Brake Booster >> Bleeding Hydro-Boost System

Bleeding Hydro-Boost System

  1. Fill power steering pump reservoir and leave undisturbed for at least 2 minutes. Start engine and run momentarily. Add fluid if necessary. Repeat until fluid level remains constant with engine running.
  2. Stop engine. Raise front wheels off the ground. Turn steering wheel from stop-to-stop. Add fluid if necessary. Lower vehicle.
  3. Start engine. Press brake pedal several times while turning steering wheel from stop-to-stop. Turn engine off. Press brake pedal several times to exhaust accumulator pressure. Check fluid level. Add fluid (if necessary).
  4. If fluid is foamy, let vehicle stand for several minutes, then repeat step 3). Air in system will cause fluid level to rise with engine off. Continue to bleed system until all air is expelled. If all air is not expelled after bleeding system, check power steering system for problem.
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