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Which wheel cylinders/shoes?

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Old Dec 2, 2005 | 09:19 AM
  #1  
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5th Wheeling
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Which wheel cylinders/shoes?

I went to the parts store last night to get cylinders and shoes, but found out there are two different sizes. Is there any way to tell which ones I have without pulling them, and taking them to the parts store?

I've got a '75 2WD, reg cab, SWB, 390, auto
 
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Old Dec 2, 2005 | 01:49 PM
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Mil1ion
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You need to find out if they are a 7/8" or 15/16" bore.

Ford used both.

Unfortunately there is no visible way to tell without pulling the drum off.

Did you know you can look up aftermarket part numbers on-line ?

Here is one site which is an FTE sponsor.

http://www.rockauto.com/
 

Last edited by Mil1ion; Dec 2, 2005 at 01:56 PM.
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Old Dec 2, 2005 | 03:38 PM
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5th Wheeling
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Well, I've had the drum off, and looked at them. I even looked at the two different ones at the parts store. The two different sizes at the parts store had a slightly different casting where the bleader valve bore is (but appeared to fit the same hole in the back of the drum), and one was about 1/16"-1/8" longer, but I wouldn't count on either of those to identify it. I didn't see a part number on the ones on the truck, so... again, is my best bet to just take a cylinder and shoe with me to the parts store? Even then how do you identify which is which, when they appear to be the same casting? Or is that little big of difference in the castings what I need to use to identify them?
 
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Old Dec 2, 2005 | 05:49 PM
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Just take them both.
The store will put a micrometer on the WC to size it.
 
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Old Dec 2, 2005 | 05:55 PM
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5th Wheeling
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Okay, now I feel really stupid. I could've just borrowed a set of calipers from work, and done this myself....

Thanks...
 
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Old Dec 3, 2005 | 07:21 PM
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plowpusher
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From: lino lakes, mn
when you pull the wheel cylinder off pop off the dust boot flip out the piston read it the size is usually stamped inside the rubber of the piston
 
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