Mazda Trucks 1972-1986 Repair Guide

Power Brake Booster

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REMOVAL & INSTALLATION



See Figures 1 and 2

Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the power brake booster mounting



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Fig. Fig. 2: Checking clearance between the piston and rod

  1. Remove the master cylinder.
  2.  
  3. Disconnect the pushrod at the pedal.
  4.  
  5. Disconnect the vacuum line at the booster.
  6.  
  7. Unbolt and remove the power booster from the firewall.
  8.  
  9. Installation is the reverse of removal. Check the clearance between the master cylinder piston and the power booster pushrod. Clearance should be 0.10-0.50mm (0.0039-0.0197 in.) on trucks through 1984; 0 on 1986 trucks. If not, adjust it at the pushrod. Torque the mounting nuts to 17 ft. lbs.
  10.  

 
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