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Weak brake pressure

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Old May 3, 2012 | 10:13 AM
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whiteisright
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Weak brake pressure

I rebuilt the from drums, and replaced the master cylinder, but i am still having to pump the brakes to come to a stop. I bench bled the master until no air came out of the ports, and I have bled each wheel at least a dozen times. Still not good pressure. Any ideas? I havnt seen any fluid leak out of any drum and I rebuilt the fronts at least 2 months ago.

I have the parts to rebuild the rear, but after gettin my wheels and spacer un bolted last night, I realized the floating axles have to be removed, therefore new seals needed. Either way, I havnt noticed the rear drums leaking anything.
 
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Old May 3, 2012 | 11:15 AM
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Are the rear drums adjusted, the shoes should just barely drag on the drums, if not adjusted properly the shoes can take up a ton of pedal travel before they engage the drums.
 
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Old May 3, 2012 | 11:18 AM
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Havnt adjusted, but this could be the cause for having to pump quickly 3 or 4 times before I get hard pressure?
 
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Old May 3, 2012 | 11:24 AM
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You'd still have pressure but it would be at the very bottom of your pedal travel, making it feel like there's no pressure until the shoes engage.
 
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Old May 3, 2012 | 11:43 AM
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Ah, the pumping gets it hard pressure at the top of the pedal, and then the difference in muscle I have to give it to brake is incredible haha. Almost like I have power disk brakes after 3 or 4 pumps
 
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