Rear brake problems

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scottrosenberg
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Joined: 25 Mar 2009 20:26

Rear brake problems

Post by scottrosenberg »

I am rebuild the rear brakes on my 71 wagon. New wheel cylinders and shoes. I have everything installed but am having trouble getting the drums back on. It feels like everything has grown a little bit. I have not bled the brake yet, so I know that there should be room. Any help
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defdes
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Re: Rear brake problems

Post by defdes »

Are the wheel cylinder adjusters backed out all of the way? I have had to "dress" Portefield pads before because I was having the same problem you are having. I did it on a flat surface with a piece of 100 emery cloth taped to the table.
scottrosenberg
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Joined: 25 Mar 2009 20:26

Re: Rear brake problems

Post by scottrosenberg »

It looks like the adjusters are all the in. It was 20 years ago the last time I worked on drum brakes. It might be a good time to purchase the 510 manual. In the mean time I think start over from step one, and reinstall everyting again. Unless someone has an idea.
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hang_510
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Re: Rear brake problems

Post by hang_510 »

scottrosenberg wrote:I have not bled the brake yet, so I know that there should be room. Any help
if that doesnt allow the cylinders to fully retract, then try 'dressing' the shoes.
byron wrote:I'd be all over that like a fat kid on a smartie.
okayfine wrote:Sense doesn't always have everything to do with it, and I speak from experience.
datzenmike
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Re: Rear brake problems

Post by datzenmike »

E brake cable backed off too????
"Nissan 'shit the bed' when they made these, plain and simple." McShagger510 on flattop SUs
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okayfine
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Re: Rear brake problems

Post by okayfine »

What brand of shoes? Some cheaper aftermarket stuff might not be exactly within spec.

However, even with Datsun NOS, I still had to adjust the shoes vertically a bit to get the drum to fit the first time. When you replace them, there's a decent amount of room for 'em to move up and down. Likely you just have to get the shoes into the sweet spot and you'll be GTG.
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brknrekord
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Re: Rear brake problems

Post by brknrekord »

Did you disassemble the adjusters to clean and grease them? If not, there could be crap inside them keeping them from collapsing fully. Just a possiblility.
Three B's Racing
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Re: Rear brake problems

Post by Three B's Racing »

I've found with a set that the shoes nubs that sit on the adjusters and the cylinders needed to be ground down a bit. Now I don't know why this was to be but after a grinding they fit in my 510 just fine. I was told I had shoes for the 240Z not the 510, yes they were after markets. Don't know fersure as I haven't done rear Z brakes in 30+ years.
scottrosenberg
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Re: Rear brake problems

Post by scottrosenberg »

Thanks for all of the insight to my brake problems. Got the problem fixed with your help, everything went back together great. One last question on the brake adjuster, once I backed it in all of the way, and everything is together, what is the correct setting for good brake wear?
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defdes
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Re: Rear brake problems

Post by defdes »

The wheels should be tight to turn by hand, but not hard to turn. I usually adjust them in until they become hard to turn, then back off one "click".
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