tri sided PHD shaft repair..worth it?

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greybeard
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tri sided PHD shaft repair..worth it?

Postby greybeard » Wed Sep 12, 2018 10:29 am

Hung a root while drilling a post hole yesterday and twisted off the drive line tube on my 3pt PHD about 14" from where it connects to the PTO shaft . Are they worth trying to repair (weld in a new tube) or do I just buy a whole new driveline complete with u-joints?
If repairable, where do you buy the blank tube?
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Re: tri sided PHD shaft repair..worth it?

Postby M-5 » Wed Sep 12, 2018 11:06 am

greybeard wrote:Hung a root while drilling a post hole yesterday and twisted off the drive line tube on my 3pt PHD about 14" from where it connects to the PTO shaft . Are they worth trying to repair (weld in a new tube) or do I just buy a whole new driveline complete with u-joints?
If repairable, where do you buy the blank tube?


Tractor supply, rural king should have the tri tube . If yokes are good just replace tubes
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Re: tri sided PHD shaft repair..worth it?

Postby greybeard » Wed Sep 12, 2018 11:13 am

Thanks, I'll take a look at our TSC but they don't carry much of anything unless it has to do with goats dogs or clothes...
(It's one time I'm glad I still had the plastic shield on the driveline)
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Re: tri sided PHD shaft repair..worth it?

Postby Atimm693 » Wed Sep 12, 2018 11:54 am

I'd be concerned about why it twisted off. Should have a shear pin or slip clutch to prevent that.
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Re: tri sided PHD shaft repair..worth it?

Postby jltrent » Wed Sep 12, 2018 12:40 pm

I would replace the tubing as you can buy online whatever you need. I broke a pipe on my V-rake (hung it on a wood post)and the size tube was not standard, so I got online and got exactly what I needed shipped to my door and a pretty good price. My welding usually holds, but I did get a guy who makes a liven weld it and it probably is stronger that OEM. Tell them what you need and they work steel for a liven and will send what you need.

Lots of companys online. Here is one for example. Those drive-lines usually are pretty pricey.

https://www.discountsteel.com/items/Steel_Tube_Pipe.cfm
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Re: tri sided PHD shaft repair..worth it?

Postby greybeard » Wed Sep 12, 2018 1:08 pm

Atimm693 wrote:I'd be concerned about why it twisted off. Should have a shear pin or slip clutch to prevent that.

I've never seen a slip clutch on a 3pt post hole digger.
The newer 3 sided tubes appear to be fixed to the ujoint hub with a drive pin, which may or may not shear. This one was OEM and the tube was welded to the ujoint on the tractor pto shaft end, with a 5/16 bolt and nut on the gearbox end of the tube....................but, it appears that gearbox input shaft id keyed. (I really haven't gotten a good look at it yet) It twisted off in the part of the tube that was exposed or extended from the other 1/2 of the tube, making it a single thickness tube-the weakest part of the tube. Pretty small diameter and wall tube too.
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Re: tri sided PHD shaft repair..worth it?

Postby Supa Dexta » Wed Sep 12, 2018 3:54 pm

Yeah my post hole digger just stalls the tractor when it grabs something tough, But I never like when it happens. Have also needed a large tractors loader to pull it out a few times since 3pt hitch couldnt lift itself back out at times.

Replacement shaft it expensive enough by itself, entire new assemblies will scare you.
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Re: tri sided PHD shaft repair..worth it?

Postby greybeard » Wed Sep 12, 2018 5:46 pm

Image
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Re: tri sided PHD shaft repair..worth it?

Postby hurleyjd » Wed Sep 12, 2018 6:22 pm

greybeard wrote:Image

Try one of the tractor dealers locally. you may have to buy the tube and the part of the u-joint it is welded to. What brand is the post hole digger.
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Re: tri sided PHD shaft repair..worth it?

Postby ohiosteve » Wed Sep 12, 2018 7:04 pm

You probably know this, but make sure the yokes are lined up properly before welding them or the shaft won't last very long at all.
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Re: tri sided PHD shaft repair..worth it?

Postby greybeard » Wed Sep 12, 2018 8:31 pm

Yep, keep the joints in phase..

What brand is the post hole digger.

Not sure right off the top of my head and I can't go look at it till tomorrow when it's light and not raining.
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Re: tri sided PHD shaft repair..worth it?

Postby cfpinz » Thu Sep 13, 2018 6:51 am

I had an old Danuser F8 that would shear the pins off that held the auger to the gearbox shaft. One day I used a Grade 5 bolt instead of a Grade 2 because it's all I had laying around. Did not end well.

Now I've got one for our skid loader, it doesn't have any shear protection other than the loader hydraulics.
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Re: tri sided PHD shaft repair..worth it?

Postby Rajela » Thu Sep 13, 2018 7:03 am

You should be able to pick up a new shaft for less than $100.00.
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Re: tri sided PHD shaft repair..worth it?

Postby jltrent » Thu Sep 13, 2018 11:47 am

Rajela wrote:You should be able to pick up a new shaft for less than $100.00.
If it is like every new shaft I have priced he will probably be in the market for a whole new PHD.
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Re: tri sided PHD shaft repair..worth it?

Postby greybeard » Thu Sep 13, 2018 12:11 pm

jltrent wrote:
Rajela wrote:You should be able to pick up a new shaft for less than $100.00.
If it is like every new shaft I have priced he will probably be in the market for a whole new PHD.

close to it.
The tube itself isn't availabe locally.......everyone here carries sq shafts. :(
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