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1979 Toyota Pickup Master Cylinder

Tiny
RUSTNGREESE
  • MEMBER
  • 1979 TOYOTA PICKUP
  • 4 CYL
  • 4WD
  • MANUAL
  • 125,000 MILES
I replaced the master cylinder on this pickup because there was an obvious internal leak. When I went to bleed the brakes everything went as normal bleeding the rear right first then rear left. When I was done, the pedal was rock hard with only 2 inches of play and no squish, making it impossible to bleed the fronts. Has anyone heard of this problem? I am suspecting a problem with the new master cylinder, (it's new not reman). The truck has drum rears, and disc fronts. Any thoughts on the subject would be greatly appreciated. Thanks.
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Sunday, May 25th, 2008 AT 5:12 PM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

I would be inspecting the master cyl if the pedal has gone rock hard, you may be just unlucky and got a defective one. Just one thought if you can still bleed the rears and not the fronts, I also would be looking at any proportioning valve fitted as well.

Mark (mhpautos)
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Sunday, May 25th, 2008 AT 5:26 PM
Tiny
RUSTNGREESE
  • MEMBER
  • 2 POSTS
Thanks for the reply Mark. You are right, I was one of the lucky ones with a defective master cylinder. Again, thanks for your input. Randy
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Monday, May 26th, 2008 AT 12:20 PM

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