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BRAKE LOCK UP

Tiny
R OGLE
  • MEMBER
  • 1989 MAZDA MPV
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 1,000,000 MILES
BRAKE HAS FULL PEDDLE
Wednesday, March 2nd, 2011 AT 1:09 AM

4 Replies

Tiny
R OGLE
  • MEMBER
  • 3 POSTS
ALL FOUR WHEELS ARE AS IF BRAKES PEDDLE IS PUSHED. BY REMOVING VACUUM HOSE BRAKES ARE RELEASED. HAVE INSTALLED REMAN BOOSTER, NEW MASTER CLY
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Wednesday, March 2nd, 2011 AT 1:23 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Is the brake pedal to booster pushrod adjustment correct? If there is no clearance, the master cylinder would be partially activated and when heating occurs to the brake fluid in the brake system, the wheels would lock.
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Wednesday, March 2nd, 2011 AT 8:12 PM
Tiny
R OGLE
  • MEMBER
  • 3 POSTS
WHAT IS THE CORRECT CLEARANCE FOR PUSH ROD?
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Wednesday, March 2nd, 2011 AT 10:35 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
PEDAL FREE PLAY

Depress pedal a few times to eliminate vacuum.
Pedal free play should be.16-.28" (4-7 mm).
Adjust play by loosening push rod lock nut.
Turn push rod until correct free play is obtained.
Tighten push rod lock nut.
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Thursday, March 3rd, 2011 AT 10:17 PM

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