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Ford 9N, 2N & 8N Discussion Forum
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Brakes, 9N ?

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Rick

10-05-2003 04:21:39




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At the top of my brake plate is a bolt that sticks out with a nut on it. On the back side of the bolt is a cam mechanism that can be turned by the bolt. This cam is under the top brake shoe. What is the setting on this cam and what is it for????? ?




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Jeb2N

10-05-2003 05:07:21




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 Re: Brakes, 9N ? in reply to Rick, 10-05-2003 04:21:39  
That square bolt and cam mechanism is like the star-wheel on modern drum brakes. Basically, when you put new shoes on, you have to adjust them so that they're not too loose or too tight. Also, you must be able to compensate for wear on the shoes. Both of these are accomplished by turning that bolt. When installing new shoes, turn the bolt so that the pins are all the way in. Once the wheel is back on, jack both wheels off the ground and turn one while adjusting the bolt until you can't turn it by hand any more and then back off until there is just a very light drag. Then do the same for the other wheel.

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No, the TOP one, Rick

10-05-2003 05:32:22




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 Re: Re: Brakes, 9N ? in reply to Jeb2N, 10-05-2003 05:07:21  
you are describing the large square bolt at the REARWARD part of the brake plate. This I understand. What I am talking about is a much smaller one at the TOP of the brake plate.



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Jeb2N

10-05-2003 06:59:22




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 Re: Re: Re: Brakes, 9N ? in reply to No, the TOP one, Rick, 10-05-2003 05:32:22  
Okay, I know what it does, just not exactly why. On the other end of that bolt is an off center circle that functions as a cam. You turn the bolt a little bit and that cam will push up on the upper brake pad. If i'm not mistaken, this is just another adjustment, perhaps in case you run out of adjustment on the larger, rear adjustment bolt. It just gives the upper brake pad a little more push towards the drum, but it is stationary and doesn't move when the brakes are actuated. It's just an adjustable stop. Why they have both adjustments on the plate, i'm not sure. Again, i'll consult the FO-4 and get back with you. Seems kinda redundant to me, but then again, i haven't put my brakes back together yet!

Jeb

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