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Allis D17 IV brakes
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gerkendave View Drop Down
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Joined: 08 Jul 2013
Location: York, Nebraska
Points: 568 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gerkendave Quote  Post ReplyReply Direct Link To This Post Topic: Allis D17 IV brakes
    Posted: 24 Jun 2017 at 1:04pm
Hey everyone I've finally gotten myself a series IV that I've been searching for. Thought I got a good tractor but turns out I was lied to a little bit. Anyhow it's mine now so time to get her going! I noticed while driving that I had a very audible clunk develop after having it home for a week. Thought it was coming from the left final drive but noticed it would go away with the brake applied. So I pulled the covers on the brakes and noticed that the drum (I guess that's what it'd be called) is loose. How is that all assembled in there? Obviously to fix it I need to pull the axle but will it hurt anything to rake hay with it this year with the drum loose in there?
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DanD View Drop Down
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Joined: 11 Sep 2009
Location: WI
Points: 856 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DanD Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2017 at 3:06pm
The drum part you're referring to will fit a little loose on the axle. The two halves slide apart to get the brake to work. The one half slides on splines on the axle, it's not fixed tight like an older D17 or WD tractor.

Edited by DanD - 24 Jun 2017 at 3:07pm
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gerkendave View Drop Down
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Joined: 08 Jul 2013
Location: York, Nebraska
Points: 568 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gerkendave Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2017 at 3:26pm
Thanks Dan. The right side is a little loose.. I'm guessing it is ok. The left side is very loose. How are the two halves held together? Springs?
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DanD View Drop Down
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Joined: 11 Sep 2009
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Points: 856 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DanD Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2017 at 6:05pm
Two springs. The pedal activates the band on the outside of the drum. This tries to slow one half of the drum. Steel balls on ramps inside then force the two halves apart and the linings on either side of the drum rub on the differential bearing carrier and on a piece of steel in the axle housing. There is only a few thousands clearance when the brakes aren't activated. It's important to have this clearance right after doing a brake job.
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gerkendave View Drop Down
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Joined: 08 Jul 2013
Location: York, Nebraska
Points: 568 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gerkendave Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jun 2017 at 8:23pm
Thanks Dan. I really need to get my service manual ordered!
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Bret (OH) View Drop Down
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Joined: 15 Sep 2009
Location: Blanchester, OH
Points: 353 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bret (OH) Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 2017 at 5:48am
If you will put your email address in your member profile, or PM it to me, I will send you a bunch of photos of the brake system I took when we did the One-Seventy (brakes are the same as Series IV).
There's too many photos to resize to fit the forum.
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gerkendave View Drop Down
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Joined: 08 Jul 2013
Location: York, Nebraska
Points: 568 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gerkendave Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 2017 at 6:15am
Thanks Brett. I thought I had it on there! Looks like I didn't make it visible. Should be on my profile now. Thanks again!
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