2007 Chevrolet Silverado Hydroboost replacement

Tiny
BUNGLEBEE
  • MEMBER
  • 2007 CHEVROLET SILVERADO
We are trying to replace the hydroboost in our 2007 Chevrolet 3500 Duramax Diesel. We have removed the keeper clip, but there is additional hardware securing the push rod from the hydroboost to the brake pedal. We have tried prying it out, alan wrenches, nothing works. How do we remove this bolt or is there another way to remove the push rod from the brake pedal?
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Friday, March 7th, 2014 AT 8:20 AM

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Tiny
HMAC300
  • EXPERT
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.

Apply the park brake and block the wheels.
Depress brake pedal at least 10 times in order to relieve pressure in the accumulator.
Remove the master cylinder from the hydraulic booster. Refer to Master Cylinder Replacement (JD9, Jfe, JF7) or Master Cylinder Replacement (JH6, JH7).
Fig. 44: View Of Accumulator With C-Clamp
Courtesy of GENERAL MOTORS CORP

Courtesy of GENERAL MOTORS CORP.
Place the J 26889 over the end of the accumulator. See Special Tools.
Install the nut on the stud.
Depress the accumulator with a C-clamp. If the accumulator does not move with moderate pressure, remove the C-clamp and depress the brake pedal ten times in order to relieve pressure in the accumulator.
Fig. 45: Identifying Brake Booster Retaining Ring & Access Hole
Courtesy of GENERAL MOTORS CORP.
Rotate the retaining ring (2) until either end of the ring is under the access hole (1).
Depress and hold the retaining ring (2) with a small tool inserted into the access hole (1).
Fig. 46: Identifying Accumulator Components
Courtesy of GENERAL MOTORS CORP.
Remove the accumulator retainer ring (1) using a small hook shaped tool.
Fig. 47: View Of Accumulator With C-Clamp
Courtesy of GENERAL MOTORS CORP.
Release the C-clamp.
Remove the nut from the stud.
Remove the J 26889. See Special Tools.
Fig. 48: Identifying Accumulator Components
Courtesy of GENERAL MOTORS CORP.
Remove the accumulator (2) and the O-ring seal (3).
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Friday, March 7th, 2014 AT 2:00 PM
Tiny
HMAC300
  • EXPERT
One other ting if you are rplacign the whole unit the rod may be held with a spring clip that will have to moved forward or backward to line up with large hose so it will come off.
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Friday, March 7th, 2014 AT 2:02 PM
Tiny
HMAC300
  • EXPERT
I found a better pic my. Cardone. Com
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Friday, March 7th, 2014 AT 2:12 PM

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