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D-17 series III disc brakes


 
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luckey
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PostPosted: Sat Jan 09, 2021 12:07 pm    Post subject: D-17 series III disc brakes Reply to specific post Reply with quote

I replaced the brakes on this tractor last summer and I am having problems with the left brake locking up. When I did the brake job I reset the disc brake drum clearance to the factory setting of 2.034-2.044. I removed several shims as the distance was to small. Does anyone know what the dimension of the disc drum is with new pads ? I believe I need to add shims back ins.o the drum does not expand to much.
 
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DrAllis
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PostPosted: Sun Jan 10, 2021 4:28 am    Post subject: Re: D-17 series III disc brakes Reply to specific post Reply with quote

Chances are 99% of the time ( f you've not changed any hard parts) you leave the shims the SAME !!! They've ran that way for 20 or 30 years. When assembled reach down inside from the top and gently shove in a feeler gauge. They cannot be tighter than .025" clearance and not more than .040".
 
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luckey
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PostPosted: Sun Jan 10, 2021 4:50 am    Post subject: Re: D-17 series III disc brakes Reply to specific post Reply with quote

Thanks, The assembled dimension is what I really needed. I am currently measuring .042 on the assembled disc drum. I did replace the inner hub. I also took out several shims to obtain original
dimensions on both sides per local dealer. I will be adding some of those back in and then do the right side also.
 
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DrAllis
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PostPosted: Sun Jan 10, 2021 5:04 am    Post subject: Re: D-17 series III disc brakes Reply to specific post Reply with quote

Be sure to use anti-seize on the ball pockets and lightly on the hub splines. Nothing can be dry, but you also don't want the lining to get soaked with lube.
 
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luckey
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PostPosted: Sun Jan 10, 2021 5:08 am    Post subject: Re: D-17 series III disc brakes Reply to specific post Reply with quote

you must have read my mind about the anti-seize.Thanks
 
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Bob Bancroft
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PostPosted: Sun Jan 10, 2021 5:34 am    Post subject: Re: D-17 series III disc brakes Reply to specific post Reply with quote

I'm remembering a little tube with which a little dry graphite could be sprinkled on the balls/sockets.
 
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DrAllis
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PostPosted: Sun Jan 10, 2021 6:29 am    Post subject: Re: D-17 series III disc brakes Reply to specific post Reply with quote

After nearly 50 years of doing these band/disc brakes I've never seen an issue with anti-sieze or even a high temp grease. To sprinkle some graphite powder on the balls/ramps might be OK, but I don't see how it would ever last like the other two would. Remember, I've done some tractors 2 or 3 times over that time span to see the results of what I've done.
 
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Eldon (WA)
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PostPosted: Tue Feb 16, 2021 9:04 pm    Post subject: Re: D-17 series III disc brakes Reply to specific post Reply with quote

luckey wrote:
(quoted from post at 13:07:10 01/09/21) I replaced the brakes on this tractor last summer and I am having problems with the left brake locking up. When I did the brake job I reset the disc brake drum clearance to the factory setting of 2.034-2.044. I removed several shims as the distance was to small. Does anyone know what the dimension of the disc drum is with new pads ? I believe I need to add shims back ins.o the drum does not expand to much.


I bought a tractor that did the very same thing. I tore it apart and it had new linings and bands in it, anti seize on the balls, dimensions all correct. Cleaned the goop off everything, put back together and same problem. I came to the conclusion that it was the material the linings were made of that caused them to grab, especially after a rain or high humidity. No problems in the heat of summer. I sold the tractor to my neighbor, I think he sprinkled some kitty litter in there and got them to work better....
 
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