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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Hydraulic Brake System) >> Repair Instructions >> Hydraulic Brake Booster Accumulator Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: The accumulator contains compressed gas. Always use the proper tools and follow the recommended procedures or personal injury may result. Do not apply heat to accumulator. Do not attempt to repair an inoperative accumulator. Always replace an inoperative accumulator with a new one. Dispose of an inoperative accumulator by drilling a 1.5 mm (1/16 in) diameter hole through the end of the accumulator can, opposite the O-ring.
CAUTION: Push rod removal is not recommended. Improper staking of the push rod to the Hydroboost reaction piston can result in a loss of brakes. If the rod or seals require service, the entire unit must be replaced.
  1. Press brake pedal at least ten times to relieve pressure in the accumulator.
    2. Fig 1: View Of Master Cylinder & Hydraulic Brake Booster
    GM360977Courtesy of GENERAL MOTORS CORP.
  2. Remove the master cylinder from the hydraulic brake booster. Refer to Master Cylinder Replacement .
    3. Fig 2: View Of Accumulator & C-Clamp
    GM791940Courtesy of GENERAL MOTORS CORP.
  3. Place the J 26889  over the end of the accumulator. See Special Tools .
  4. Install the nut on the stud.
  5. Press the accumulator with a C-clamp. If accumulator does not move with moderate pressure, remove the C-clamp and press brake pedal 10 times to relieve pressure in the accumulator.
    6. Fig 3: Identifying Brake Booster Retaining Ring & Access Hole
    GM360991Courtesy of GENERAL MOTORS CORP.
  6. Rotate retaining ring (2) until either end of the ring is under the access hole (1).
  7. Press and hold the retaining ring (2) with a small tool inserted into the access hole (1).
    8. Fig 4: Identifying Accumulator Components
    GM361385Courtesy of GENERAL MOTORS CORP.
  8. Remove the accumulator retainer ring (1) using a small hook shaped tool.
    9. Fig 5: View Of Accumulator & C-Clamp
    GM791940Courtesy of GENERAL MOTORS CORP.
  9. Release the C-clamp.
  10. Remove the nut from the stud.
  11. Remove the J 26889  . See Special Tools .
    12. Fig 6: Identifying Accumulator Components
    GM361385Courtesy of GENERAL MOTORS CORP.
  12. Remove the accumulator (2) and O-ring seal (3).
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