Question about 1994 Chevrolet G20

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POWER BRAKE BOOSTER REMOVAL,HELP!

PLEASE HELP ME.HOW DO I REMOVE A POWER BRAKE BOOSTER IN A 1994 CHEVY G20 VAN,CONV. VAN?? CAN U HELP?

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  • DSDADDYSGIR Oct 19, 2008

    CAN ANYONE HELP?WHO DONT NEED TO GET PAID?NOTHINGS FREE ANYMORE,NOT EVEN ADVICE!!!! I NEED 2 REMOVE A POWER BRAKE BOOSTER, CHEVY G20 VAN

  • Anonymous Mar 19, 2014

    How to remove

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Remove master cly. from booster. then under dash remove clip & pin from brake pedal . pull carpet down remove 4 nuts . pull off booster..

Posted on Oct 21, 2008

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The honest answer is "skip8303" is correct, but if you want "free" info,try Autozone.com. There they have repair guides for many popular vehicles. I am a professional mechanic, but have found they're service to be helpful. As far as actual diagnostic procedures are concerned they don't really offer that info, but they do tell you how to replace parts, once you've identified the problem that is. Hope this helps.

Posted on Nov 06, 2008

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Posted on Jan 02, 2017

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Replace brake booster


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The power brake booster is a tandem vacuum suspended unit. Some models may be equipped with a single or dual function vacuum switch which activates a brake warning light should low booster vacuum be present. Under normal operation, vacuum is present on both sides of the diaphragms. When the brakes are applied, atmospheric air is admitted to one side of the diaphragms to provide power assistance.
REMOVAL & INSTALLATION

1994-97 Models
See Figures 1 and 2
  1. Apply the parking brake and block the drive wheels.
  2. Remove the master cylinder-to-power brake booster nuts, then reposition the master cylinder and combination valve out of the way; if necessary, support the master cylinder on a wire to prevent damaging the brake lines.

When removing the master cylinder from the power brake booster, it is not necessary to disconnect the hydraulic lines, therefore the brake system should not have to be bled.
  1. Disconnect the vacuum hose from the power brake booster.


12_11_2011_8_48_59_pm.gif

Fig. Fig 1: Common power brake booster attachment


  1. From under the dash, remove the retainer and washer from the brake pedal on 1994 utility models. On all other models, remove the retainer and brake switch from the brake pedal.
  2. Disconnect the pushrod from the brake pedal.
  3. From under the dash, remove the power brake booster-to-cowl retaining nuts.
  4. Back under the hood, remove the power brake booster and the gasket from the cowl.

To install:
  1. Position the booster to the cowl using a new gasket.
  2. Install the bo oster retaining nuts and tighten to 16 ft. lbs. (22 Nm) 1994 utility models, 24 ft. lbs. (32 Nm) on 1994 pick-up models and 27 ft. lbs. (36 Nm) on all 1995-97 models.
  3. Connect the pedal pushrod and install the washer or switch and the retainer.
  4. Connect the vacuum hose.
12_11_2011_8_52_07_pm.gif

Fig. Fig. 2: Checking the piston booster rod using the gauge tool

  1. For all vehicles cover ed in this guide, gauge the booster rod:
    1. Apply 25 in. Hg (85 kPa) of vacuum using a hand held vacuum pump or apply maximum engine vacuum.
    2. Chec k the maximum and minimum rod lengths using J-37839 or an equivalent pushrod height gauge.
    3. If the piston is not within limits, install a service adjustable piston rod and adjust it to the correct length.
  2. Reposition the master cylinder and combination valve bracket to the booster studs, then secure using the retaining nuts. For details, please refer to the master cylinder procedure located earlier in this section.
  3. Start and run the engine, then check for proper booster operation.

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