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Oops!

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=131044
Printed Date: 21 May 2025 at 10:49pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Oops!

Posted By: Eldon (WA)
Subject: Oops!
Date Posted: 07 Nov 2016 at 9:40pm

Tilling a sand-packed horse arena with the 185 and 80" Howard rotovator this morning, finished the first pass and something popped and the tiller stopped. Get off the tractor to take a look and the 540/1000 pto stub is hanging out of the tractor. Take it home and take the tiller off and see one bolt missing and the other three sheared off! I knew it was working the tractor hard, but never expected this. Now I get to have fun extracting the three bolts. I guess it was better than breaking something inside....

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ALLIS EXPRESS!
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Replies:

Posted By: CrestonM
Date Posted: 07 Nov 2016 at 9:47pm

I'd say so! Hope nothing major was hurt. Might make sure the splines inside and outside the tractor are ok and not damaged.

Posted By: Eldon (WA)
Date Posted: 07 Nov 2016 at 9:58pm

I'm pretty sure the stub is just driven by the 4 bolts, large b/c for the 540, flip it and use the small b/c for the 1000.

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Posted By: shameless (ne)
Date Posted: 07 Nov 2016 at 10:01pm

I broke one of them PTO turn around units on my 7010 bush hogging one day! dealer said he'd never seen one of them break before and gave me one off a tractor on their lot (no charge) and haven't broke it yet. no bolts broke off, was the 540 shaft side.

Posted By: DanWi
Date Posted: 07 Nov 2016 at 10:14pm

With the heads broke off, if the bolts didn't turn in hard alll the way they should turn out easy with no pressure on them. Used a small drill bit on one on a 200 and it turned it in farther just had ti drill enough of a hole for a small ez out to back it out. Or if you are good with a welder and they broke off flush you could use that trick. good luck

Posted By: shameless (ne)
Date Posted: 08 Nov 2016 at 1:13am

also try some left hand drill bits

Posted By: JC-WI
Date Posted: 08 Nov 2016 at 1:23am

Left hand drill bits was going to be my first suggestion,,, and then the second would be to take a small chisel and carefully see if you can tap the end of the bolt to turn them out. Its not like they are rusted in there...
Yea, good luck.

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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."

Posted By: Dan73
Date Posted: 08 Nov 2016 at 1:43am

JC(WI) wrote:

<table ="tableBorder" cellspacing="1" cellpadding="3" align="center"><t><tr ="msgOddTableRow" style="height:200px;min-height:200px;"><td ="msgLineDevider" valign="top">

   <div ="msg">
   Left hand drill bits was going to be my first suggestion,,, and then
the second would be to take a small chisel and carefully see if you can
tap the end of the bolt to turn them out. Its not like they are rusted
in there...
Yea, good luck.

   </td></tr></t></table>

2x just what I was thinking.

Posted By: Amos
Date Posted: 08 Nov 2016 at 6:33am

Bolt may have been stretched, we have had that happen here or caught it when it was loose and the bolts were stretched, most likely from being over tightened...

Posted By: Tbone95
Date Posted: 08 Nov 2016 at 6:42am

I broke a bolt off in mine while installing and over tightened. It came out quite easily.

Posted By: MACK
Date Posted: 08 Nov 2016 at 7:32am

I would say the bolts were loose to start with. MACK

Posted By: Eldon (WA)
Date Posted: 08 Nov 2016 at 9:06am

MACK wrote:

I would say the bolts were loose to start with. MACK

That could have been the case...I never thought to keep an eye on them, but a tiller is real hard on pto components. The tiller was jumping around a lot, the ground was very hard. I was going to go get my chisel plow and rip it up first as I normally do when the ground is compacted, but the gal said there was pit run fill under the sand and I didn't want to pull up rocks. Note to self....don't try to till horse arenas! I will cross my fingers and check it out further this morning.

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Posted By: Gerald J.
Date Posted: 08 Nov 2016 at 9:39am

Loose bolts on PTOs lead to this failure. JD 3010 and 4010 had much the same problem. On those a rod in the center of the inner shaft shifted the gears between 540 and 1000 RPM depending on the spline extension and if you don't shift it gently and make sure its shifted for the speed that pushes the inner rod, you can break gears inside the transmission tightening the flange bolts, so on those its crucial to keep the bolts tight, checking them regularly.

Left hand drill bits often back a broken bolt stub out when they grab breaking through the other end of the broken bolt. Since the bolts probably aren't rusted in place, they should back out easily. And an easyout should work without breaking if the left handed bit doesn't.

If the tiller was jumping it might be that you were getting down to the stone fill, doing too good a tilling job.

Make sure the hitch and the PTO shaft didn't bottom anywhere in the tiller positioning, that can be hard on PTO shaft adapters and extensions too.

Gerald J.

Posted By: Eldon (WA)
Date Posted: 08 Nov 2016 at 11:36am

Fixed! All three came right out with a hammer and sharp chisel. Robbed 4 bolts off of a parts tractor, so good to go. Too bad all repairs aren't this easy

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Posted By: Ky.Allis
Date Posted: 08 Nov 2016 at 5:09pm

If I remember right they are Grade 8 bolts.

Posted By: Gerald J.
Date Posted: 08 Nov 2016 at 7:52pm

Grade 8 bolts are stronger than grade 5 but some engineers believe grade 8 is more likely to break with a shock load than grade 5. The hardness makes grade 8 more brittle.

Gerald J.