Mechanics

MASTER CYLINDER

1979 Toyota Pickup

Brakes problem
1979 Toyota Pickup 4 cyl Four Wheel Drive Manual 125000 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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Rustngreese
May 25, 2008.




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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Mhpautos
May 25, 2008.
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

Tiny
Rustngreese
May 26, 2008.

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