D15 3pt hitch rockshaft question
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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=207211
Printed Date: 24 Jun 2025 at 7:13am
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Topic: D15 3pt hitch rockshaft question
Posted By: 500592
Subject: D15 3pt hitch rockshaft question
Date Posted: 23 Jun 2025 at 8:14pm
Was using a disc mower on dads series 2 d15 with factory 3pt and had trouble with the with hydraulic remote not lowering so in the process of bringing up and down the hydraulics became quite jerky and the rock shaft broke on the right hand side when looking at the tractor from behind. It broke at the end right at the round part where the link connects to the arms of the 3 point hitch. Anyone have a good one for sale and experience welding one?
Second problem is the hydraulics. This tractor doesn’t have a transport valve and was working fine previously. Should I check the linkage under the gas or somewhere else first?
Thanks!
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Replies:
Posted By: DrAllis
Date Posted: 23 Jun 2025 at 9:11pm
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Did you break the end/yoke off the right hand LIFT ARM ?? I think that is kind of a common problem with those 3-points. Now, as far as the disc mower goes, I've never seen one small enough to even consider using it on a tractor that size. At least a D-17 or larger. 90% of the weight is all on the right side.
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Posted By: 500592
Date Posted: 23 Jun 2025 at 9:54pm
That’s the correct the yoke broke right off. Have you ever seen one welded back together that held?
I’ve used the disc mower on the this tractor in the past and usually just go easy in like low second gear and try to be really mindful when lifting the mower. I only mow 3-5 acres a year with it. However after this incident it won’t be going back on the d15….
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Posted By: Tracy Martin TN
Date Posted: 23 Jun 2025 at 10:41pm
I love the D15's. The 3 point hitch on them is too light for most tillage or lift work. The snap coupler is much tougher! Same goes for the D10-12 also. HTH Tracy
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No greater gift than healthy grandkids!
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Posted By: DrAllis
Date Posted: 23 Jun 2025 at 11:00pm
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I've never had the pleasure of trying to weld one back together. If I did, the hitch would get pretty light use from then on.
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Posted By: 500592
Date Posted: 24 Jun 2025 at 6:15am
I may try welding it back together so we can get back to busting with it. That’s mostly what the tractor does for 3pt hitch work is run a bush hog and occasionally a log winch for firewood. We had just checked and replaced a couple bolts in the bracket that bolts to bottom of the tractor I guess I didn’t realize the lift arms could be a problem as well.
Does anyone have any thoughts on the hydraulics or should I start a new thread perhaps?
Thanks for the help!
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Posted By: DrAllis
Date Posted: 24 Jun 2025 at 6:35am
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You need to plug in a 5000 psi gauge (to the remote outlet) and determine how much pressure the hyd pump can make and does it release pressure when the LIFT/LOWER lever is pulled clear down below horizontal. Traction Booster lever must be down. Transport valve has no effect on what you are doing.
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