Allis Chalmers D21 questions: Solved
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=191012
Printed Date: 08 May 2024 at 7:41am
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Topic: Allis Chalmers D21 questions: Solved
Posted By: 55allis
Subject: Allis Chalmers D21 questions: Solved
Date Posted: 01 Oct 2022 at 11:58pm
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Hi a’ll, I’m working on a D21 that has been setting for about 15 years in a machine shed with injection pump off the whole time. The owner had tried to “fix” it himself which by the way failed but luckily had another parts pump, so I dropped off the two pumps in complete pieces at my local diesel shop so he rebuilt the best one with the best pieces. So now with the problem, I think the engine got turned a little bit with the pump off and so screwed up the timing so now I’m asking if anyone with experience could explain how to get it right. My brother and I tried to start it and we only got smoke, with a drip of starting fluid it would run for a second.  Thanks 
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Replies:
Posted By: DrAllis
Date Posted: 02 Oct 2022 at 6:30am
| That sounds like you are 180 degrees off. So, the injection pump drive shaft must have been removed from the engine ??? Because the drive shaft technically only fits into the pump ONE WAY. |
Posted By: 55allis
Date Posted: 03 Oct 2022 at 4:13pm
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Yes the drive shaft was taken out but I personally made sure it was lined up, the diesel shop made sure I knew. I’m thinking because the original pump pretty much blew up it spun and I’m 180 degrees off after you mention that, it puts the puzzle together... I also think the owner ran bio diesel in it right before it sat. |
Posted By: DrAllis
Date Posted: 03 Oct 2022 at 10:36pm
| 34 degrees BTDC. |
Posted By: 55allis
Date Posted: 04 Oct 2022 at 1:51pm
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Thanks DrAllis |
Posted By: injpumpEd
Date Posted: 04 Oct 2022 at 2:54pm
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These gear/shaft assemblies are known to slip and then gaul in place when a DC pump seizes up. It is still usable, but the dot on the gear(if even has one) and the slit in center of shaft are no longer in proper orientation. It really does not matter though. With #1 injector out, and a plug stuck in hole, or friends finger, turn engine cw viewed from front until plug or finger blows out. Now you know you're on #1 compression stroke. Turn engine a little further until the 34* mark lines up. At this point is when the marks inside the pump need to line up, no matter where the pump gear dots go. They eventually did away with pump gear dots thankfully lol! Good luck! ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: 55allis
Date Posted: 05 Oct 2022 at 2:34pm
Thanks to all of you guys, it runs like a good Allis should!!! 
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Posted By: 55allis
Date Posted: 05 Oct 2022 at 2:39pm
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Posted By: darrel in ND
Date Posted: 05 Oct 2022 at 3:06pm
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That's awesome Darrel |
Posted By: injpumpEd
Date Posted: 06 Oct 2022 at 7:16am
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So, what was actually wrong? Others will surely benefit from your experience. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: 55allis
Date Posted: 06 Oct 2022 at 7:35am
It was 180 degrees off... |
injpumpEd wrote:Posted By: Calvin Schmidt
Date Posted: 07 Oct 2022 at 7:47pm
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We have a local injection shop who rebuilds a lot of pumps from IH tractors. I know of several AC pumps that he has sent back out 180 degrees. IH is on the other side of the engine. ------------- Nothing is impossible if it is properly financed |
Posted By: 55allis
Date Posted: 08 Oct 2022 at 6:10pm
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I think it was my fault because I didn’t see the little timing dots on the gears, my brother found them while I was cranking the engine over... I’m thinking about disking with it with my Dad’s older John Deere 20 foot disk.. But I don’t want to hurt anything on it so what’s other peoples opinion? Does anyone think it would hurt it? ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: AC720Man
Date Posted: 08 Oct 2022 at 7:16pm
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20ft leveling disk? My XT handles our 20ft AC disk with no problem. Should be a walk in the park for a D21 if it’s a leveling disk. ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: 55allis
Date Posted: 08 Oct 2022 at 9:15pm
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Hmm, I’m not sure what it’s considered because it’s not the lightest but it’s not heaviest. I know my Dads John Deere 4320 will pull it about right.... ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: AC720Man
Date Posted: 08 Oct 2022 at 9:40pm
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If the gangs are shaped like this >:< then it’s a leveling disk. If it’s like this \ : / then it’s an offset or cut disk. If it’s 20’, it would most likely have 4 gang wings. Look up a AC2000 disk, it is a leveling disk. ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: 55allis
Date Posted: 08 Oct 2022 at 10:53pm
Aha that makes sense, guess I never heard it put that way LOL!!  It would be a leveling disk... ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: 55allis
Date Posted: 07 Apr 2023 at 10:32pm
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Well we hooked it on to a 25 ft John Deere field cultivator and it pulled okay!! We only used it because it was the only tractor available at the time to bring up sticks…  ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: 55allis
Date Posted: 07 Apr 2023 at 10:53pm
 ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: AC720Man
Date Posted: 08 Apr 2023 at 7:21pm
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Nice looking D21. So, is it now your tractor? Was it for sale? ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: 55allis
Date Posted: 08 Apr 2023 at 7:28pm
Yes, my Dad and my older brother decided to help too. It wasn’t listed anywhere but my Dad bought the farm it and the rest of the tractors was/are on and we decided we couldn’t see them go so the owner ( my cousin) said he’d sell everything on the farm to us if we wanted them. ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: AC720Man
Date Posted: 08 Apr 2023 at 8:55pm
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That’s great, a good one to have in the shed. Curious, you said it did ok. Not enough power or spin out? ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: 55allis
Date Posted: 08 Apr 2023 at 9:51pm
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Well the fuel tank needs cleaned really good because it has loose rust that keeps plugging up the sentiment bowl holes… It would plug up and die… ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: EPALLIS
Date Posted: 09 Apr 2023 at 12:51am
| Good looking ride. Thanks for saving another A-C and bringing him back to life!! |
Posted By: 55allis
Date Posted: 09 Apr 2023 at 7:32pm
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I don’t think it would have gone to a buyer that wasn’t going to take care of it… My cousin is a purebred Allis guy, he grew up on Allis and he still loves them, only reason he never fix these up is he’s 82 years old… ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: AC720Man
Date Posted: 09 Apr 2023 at 7:55pm
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In that case, I’m sure he is grinning ear to ear. Your family is lucky to be in that situation, keeping it in the family. And a nice D21, wow, buy some lottery tickets!, ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: 55allis
Date Posted: 09 Apr 2023 at 8:11pm
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Yes, he’s grinning ear to ear!!! None of his kids/grandkids have an interest in these old tractors so he was happy that someone in the family has the orange blood… That’s me driving the 21 in the picture above… ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: AC720Man
Date Posted: 09 Apr 2023 at 8:22pm
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What other AC’s did your family buy from him? ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: 55allis
Date Posted: 09 Apr 2023 at 11:05pm
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It’s quite a list but I can list what I remember… 1957 Wd45 with factory power steering, wd with a 33 picker, 1934 wc,2 1935 wc’s, 3 other parts wc’s, 1948? Wd (bad rear end he thought), parts wd, a 770 4 row planter, a snap coupler 4 row planter, and 4 18” plow. That’s everything I can remember… That was as a package deal but before that decision I got a 45 with a d19D repower and a ‘49 wd for myself… ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |