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Allis Chalmers Discussion Forum

D-17 brake question

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Pecos Allis

02-21-2012 17:59:20

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Well guys got the D-17 maybe more than you all suggested paying for one and probably more than I should of paid for it, but around here in New Mexico D-17 are rare and any tractor you will pay a very good penny for (Leaky 800 Ford over 5K). I finally paid 2800 for it. I figured by the time I travel a couple of days or more to the midwest and back I would pay about the same. Now I took apart the brakes came out good. The right one you couldnt apply the brakes at all. When I took it apart there seemed to be a pin sticking out from the differential which was keeping the right brake from working (going forward anymore). I could see it through the bottom little hole like on the photo. What is it for and how far should it be pushed in? (I already ordered a Parts Book and Operators book). In the WD45Book it says the brakeshoes are interchangeable. The left had a large hole next to the top pin so the rear spring could go through and the front shoe also. The right shoes didnt have this hole and they seem to have less space on the bottom where the pedal rod screws to. Is this ok or is it keeping the brake from working right? Also do the differential and tranny have a common oil supply/fill/drain? PTO and 3pt too? Thanks for all your help and input to my questions..

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02-21-2012 21:33:12

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 Re: D-17 brake question in reply to DiyDave, 02-21-2012 17:59:20  
Yes they all have the springs at the top....this is what makes the brakes retract along with another spring on each brake rod. See the hole located by 01 in the pic? That is where the anchor pin goes through that holds your brake shoes together at the bottom.

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02-21-2012 21:08:39

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 Re: D-17 brake question in reply to golfcartman, 02-21-2012 17:59:20  
third party image

Here are the brakes before I overhauled them. As you can see the front and rear springs are broke...its all new now.

Oil in the housing comes from a leaking final drive seal or the seal in the differential housing.

Here is what it looked like before all the cleaning. The differential seal was leaking..it has also been replaced.

third party image
This post was edited by 79fordblake at 21:15:01 02/21/12.

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Pecos Allis

02-21-2012 21:27:20

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 Re: D-17 brake question in reply to 79fordblake, 02-21-2012 21:08:39  
Did both your right and left side shoes look the same with the spring hole on the top. My left looked like your photo but my right does not have the hole for the springs on them just the metal starts below where the hole would be. On your second photo with the light. at the far lower left is the access hole, almost directly below the 12 in 2012, thats the hole I am talking about and the pin is inside the cavity

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02-21-2012 20:59:09

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 Re: D-17 brake question in reply to basil greenleaf, 02-21-2012 17:59:20  
The pin that goes through the casting is what holds your brakes together. It goes from the outside of the final drive housing...through both brake shoes and then into the housing of the differential.

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Pecos Allis

02-21-2012 18:07:39

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 Re: D-17 brake question in reply to Pecos Allis, 02-21-2012 17:59:20  
third party image

oops forgot the photo (not my photo by the way)

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02-21-2012 18:18:56

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 Re: D-17 brake question in reply to Pecos Allis, 02-21-2012 18:07:39  
If you are getting the op and parts manual, you should get the service manual.......I&T AC-17. Shows you how to do R&R. What series D17 is it- post the tractor serial number, it"s on the left front of the torque tube, will start with D17.

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Pecos Alllis

02-21-2012 20:46:53

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 Re: D-17 brake question in reply to JMS/.MN, 02-21-2012 18:18:56  
D-17 27799, late S1, Already pulled brake shoes out and have liners on order and manuals. I have a shop manual but didnt see a service manual. probably got to go back and check for one to order. Any way what is that pin inside the housing that the brake toggle was hitting on, whats it for or do and how far should I push it in to screw it down with the set? You can see it through the smaller hole on the side if the axle is on.

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02-21-2012 20:34:44

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 Re: D-17 brake question in reply to JMS/.MN, 02-21-2012 18:18:56  
Here is what your brakes look like if it is a early D17.
third party image

third party image Here is a new right drum installed on a D17.
This post was edited by 79fordblake at 20:41:41 02/21/12.

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Pecos Allis

02-21-2012 21:01:08

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 Re: D-17 brake question in reply to 79fordblake, 02-21-2012 20:34:44  
Thanks 79fordblake, I have that diagram/photo and is what I used to remove the brake shoes and toggles, If you can imagine the toggles in the photo I posted you can see that they will rest to the left of that hole I am talking about, and directly thru that hole is a bolt/pin. Underneath is a square head bolt with a lock nut. that is where oil is leaking out of. I will not recieve my books till next week, always hope for Friday for weekend work. By the way I like your clean drum and brake area.

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