Question about 1990 Toyota 4Runner

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My 1990 4Runner is experiencing problems with the clutch pedal which is no longer effective in engaging gears. The clutch is fine, I believe that there is an issue with the fluid in the hydraulic line. The master cylinder was a bit low and I topped it up, but can't seem to get the pressure in the lines. Possibly there has been a leak and there is an air pocket. I'm not sure how to bleed this out? There is a flexable hose which may have a leak and I attempted to remove this but can't loosen the nut 9or 10mm nut which does not want to come loose without likely doing damage and having to replace the metal line as well. Your advice would be most appreciated. Thanks Dave

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Broken clutch pedal mounting bracket sub-assembly was the problem I had.

Posted on Nov 17, 2013

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  • Master
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Take the rubber boot off the slave cylinder, if fluid runs out, the slave is bad, but you will be ahead to just replace both.

Posted on Aug 31, 2010

  • dave_mcrae Aug 31, 2010

    If I take the boot off the slave the cylinder is still full, I don't know about overflowing, if that is what you are referring to by running out? It sounds like replacing the slave cylinder would be a good start if the fluid is not being pumped out?
    I was thinking that this would be more like a brake line which would need to be bled?
    Thanks for your advice and anything more you would like to add.

  • Ted Schore Aug 31, 2010

    The slave cyl is down at the trans. There is a rubber bellows type of boot there. take that boot loose. if fluid runs out, the slave cyl is bad. Another place the Master can leak is the back of the cylinder, you may be able to see the back of the cylinder looking up from inside at the back where the rod comes into the truck. The only way fluid can be low is if it leaks out. The Master is what does the pumping of fluid, and even if it doesnt "externally leak" the seal inside can leak an dit will not build pressure. By the time one or the other is worn, always replace both. The hose is just a hose. If it was stopped up, your pedal would be stiff. if it leaks, you will see the fluid leak, usually from either end where the fittings are crimped on.

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