Toyota Corolla 1970-1987 Repair Guide

Vacuum Booster

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Vacuum boosters can be found only on models equipped with power brakes

REMOVAL & INSTALLATION



  1. Remove the master cylinder as previously detailed.
  2.  
  3. Locate the clevis rod where it attaches to the brake pedal. Pull out the clip and then remove the clevis pin.
  4.  
  5. Disconnect the vacuum hose from the booster.
  6.  
  7. Loosen the four nuts and then pull out the vacuum booster, the bracket and the gasket.
  8.  
  9. Installation is in the reverse order of removal.
  10.  

OVERHAUL



Asian Type

See Figure 1

  1. Unscrew the nut at the front of the booster and remove the pushrod.
  2.  
  3. Loosen the retaining nut and then unscrew the clevis.
  4.  
  5. Pull off the rubber boot.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the vacuum booster assembly-ASIAN type

  1. Pry out the air filter retainer from around the back of the booster and then remove the three filter elements.
  2.  
  3. Put an alignment mark across the front body, the band and the rear body.
  4.  
  5. Using Special Tool #09738-00010 or a few pieces of wood and some C-clamps, compress the rear body into the front body and remove the booster band. Separate the front and rear bodies from each other.
  6.  
  7. Carefully, remove the spring retainers, the reaction plate, the reaction levers and the rubber ring.
  8.  
  9. Use snapring pliers to remove the snapring in the diaphragm plate and then pull out the operating rod toward the rear.
  10.  
  11. Using a special retainer wrench, remove the retainer and then separate the diaphragm from the plate.
  12.  
  13. Assembly is in the reverse order of disassembly.
  14.  

JKK Type

See Figure 2

  1. Loosen the retaining nut and unscrew the clevis. Remove the rubber boot.
  2.  
  3. Use a screwdriver to remove the air filter retainer and then pull out the two filter elements.
  4.  



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the vacuum booster assembly-JKK type

  1. Put an alignment mark on the front and rear shells.
  2.  
  3. Use the Special Tool #09738-00010 or a few pieces of wood and some C-clamps to compress the rear shell into the front shell.
  4.  

If the Special Tool is used, tighten its bolts to 35-52 ft. lbs. (47-70 Nm)

  1. Turn the front shell clockwise to separate the two shells, then remove the pushrod and the spring.
  2.  
  3. Remove the diaphragm from the diaphragm plate.
  4.  
  5. Push the valve operating rod in and remove the stopper key.
  6.  
  7. Pull out the valve operating rod.
  8.  
  9. Assembly is in the reverse order of disassembly.
  10.  

 
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