Question about 1998 Jeep Grand Cherokee

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Hard braking brakes seem to have to be pressed hard to work

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You likely have a bad master cylinder, but there are other possible causes - let's check the cylinder first. You will need a helper to check.Locate the brake master cylinder and reservoir under the hood - usually on the driver side, by the firewall. Remove cap and have the helper press slowly on the brake pedal as you watch for fluid movement. If no movement seen, have your helper release,then press harder. Also note the color of the fluid - it should be fairly clear, with no "beads "( water) on top.If you see beads, your fluid is contaminated and you'll need to have the brake system power flushed. A specialized piece of equipment is needed to do this, and not all shops have it.If no fluid movement, you may need to replace the master cylinder. This is generally not a difficult job, and usually the reservoir comes with the new cylinder. Replacing the reservoir is recommended, as the new one will be clear and easy to read the fluid level through. Be sure to 'bench bleed ' the new cylinder first, so when you wheel bleed the system you won't have a battle on your hands. Always wheel bleed from the farthest wheel to the closest wheel..
Hope this helps!!

Posted on Mar 28, 2014


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