HD21-P
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Classifieds
Forum Description: For sale or wanted items
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=195818
Printed Date: 06 May 2025 at 5:31am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD21-P
Posted By: Justin_WV_
Subject: HD21-P
Date Posted: 22 Jun 2023 at 9:14pm
| Found one a few months back that seems to be sound. I am thinking of pulling the trigger and have already worked a deal to haul it home. It has a good undercarriage on one side and the the other has a, let's say not so good sprocket. Pins and chains, rollers look good. Any advice on things to look for with these tractors. Spent about 6 hours looking over the internet so far for parts, found a few but not a sprocket.... Thanks for any help |
Replies:
Posted By: Codger
Date Posted: 22 Jun 2023 at 9:35pm
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Center broke out of the sprocket?
------------- That's All Folks! |
Posted By: Justin_WV_
Date Posted: 23 Jun 2023 at 7:24am
| No it is not broke. Just getting wore and starting to chip on the corners. |
Posted By: Codger
Date Posted: 23 Jun 2023 at 7:36am
You can build those back up but not with hardware store type welding filler metal. Post up a photo; maybe I can help. ------------- That's All Folks! |
Justin_WV_ wrote:Posted By: Justin_WV_
Date Posted: 24 Jun 2023 at 8:56am
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Posted By: Codger
Date Posted: 24 Jun 2023 at 9:03am
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I just popped sprockets on and off of an older 21A I think they were and a couple may be surplus to the owners needs. They however are the spoke type sprockets from an earlier tractor than this one. I would like to see photos of the worn sprocket to ascertain path. That is probably an early 70's series tractor. If so it should have bolt on segments to the rear sprockets. ------------- That's All Folks! |
Posted By: steve(ill)
Date Posted: 24 Jun 2023 at 9:25am
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I thought the "P" models were mid 1960s and had the rounded front nose like the HD21 ? About 1969-70 they came out with the 21B and it had the square nose.... ? I agree, this looks like a newer model.. ------------- Like them all, but love the "B"s. |
Posted By: Justin_WV_
Date Posted: 24 Jun 2023 at 9:53am
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Posted By: Justin_WV_
Date Posted: 24 Jun 2023 at 9:56am
| Really Struggling with uploading photos! Sorry! |
Posted By: Justin_WV_
Date Posted: 24 Jun 2023 at 10:00am
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Posted By: Justin_WV_
Date Posted: 24 Jun 2023 at 10:06am
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The owner said he thought it was about a 70. I cant tell from anything the internet has to offer. The numbers on the tag are as follows: HD21P-16018, MODEL 2100MKII, ENGINE CATALOG 4390467, 21-10041
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Posted By: Codger
Date Posted: 24 Jun 2023 at 10:12am
I know this site is a bit difficult to master posting photos onto but If you can resize down to 1024X768 or so they do very well fitting the screen. To me that tractor appears to be a 21B series of the early 1970's with an older undercarriage installed. Many of the parts were interchangeable between the P and B series IIRC. That top roller, and the sprocket I feel is older than the tractor. I see the one chipped tooth on the sprocket. If this is the worse case scenario, run it some more. The gullets, remaining teeth, rail height, and shoes look to have quite a bit of service life left to them. That top roller is showing it's age however. Probably a hodge podge of parts to keep the old girl operational but that's what it takes sometimes. I'd wager it's a pretty good project and not really for the feint of heart as some of this stuff is damned expensive to work with if you cannot perform many of the tasks yourself. Tractor serial number should be on a tag riveted to the firewall and stamped into the right side finals casting, or one the rear of the finals casting, (still on the right side). That would start to drill down to what the tractor actually is. ------------- That's All Folks! |
Posted By: Justin_WV_
Date Posted: 24 Jun 2023 at 9:02pm
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I agree it is not for the faint of heart, none of the projects I do really are. I plan on clearing about 30 acres with it. Its flat ground with very little shallow rock, very uncommon in my area. I Will be having the land timbered soon. I plan on getting the machine to get the land cleaned up and in the shape to raise hay or other crops and graze additional cattle. If the tractor has more life in her than the 30 acres, I have 40 more acres and that will be be mission complete. I am not much of a welder but I can see now that I am going to have to take it up and learn it well. A fellow that messes with older machines and keeps them going said he thought putting weld in the sprockets would give it plenty of life. I am pretty ignorant about these types of things and have trying to get the right ideas from the right people
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Posted By: Tracy Martin TN
Date Posted: 24 Jun 2023 at 9:45pm
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A good machine shop can fix the sprocket if not bolt on teeth.. They just need the pitch and chain bushing size. Weld it up and hard cut it. Not that hard of a job. HTH Tracy ------------- No greater gift than healthy grandkids! |
Posted By: alsclmhd6b
Date Posted: 02 Jul 2023 at 7:41pm
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I started working for Marks Tractor in Cincinnati Ohio in August 1971 after graduating HS AC construction equipment dealer. I'm just a hunt and peck type, so it would be easier to have a phone conversation, just leave a message and I'll call you back 513-252-1394 I'm in the EST. As far as parts go call Crane and Tractor 1600 Harmon Ave Columbus, Ohio 43223 614-443-0594 Fax 614-443-3035 craneandtractor@yahoo.com he specializes in AC and F/A Jerry Zosel he worked at Marks Tractor in Columbus, Ohio in the building next door to where he is now. if he doesn't have what you need he might be able to find it for you. thank you Donal Cash
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