One-Ninety Series II - December 1968
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=176467
Printed Date: 07 Apr 2026 at 4:38am
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Topic: One-Ninety Series II - December 1968
Posted By: Randy_Larson
Subject: One-Ninety Series II - December 1968
Date Posted: 04 Dec 2020 at 6:57am
| The production of the One-Ninety Series II officially ended prodcution on December 3, 1968 |
Replies:
Posted By: AC720Man
Date Posted: 04 Dec 2020 at 8:05pm
|
I have one and I never figured out why AC never put a series II decal on them. The D series had several series of improved models with different series on them. Of course the series III 190XT got its decal. ------------- 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: DougG
Date Posted: 04 Dec 2020 at 8:16pm
| I believe Allis was embaresed and struggling to keep up with the 190 XT rear end troubles as they had to redo all the tractors in field and soak up all the cost- as this was a major problem, and the D series stuff was minor changes, 1 million dollars Ive heard was spent , and that was alot of money to redesign and fix things already out there they werent sure until the 190 XT series 3 that things were good- then advertise |
Posted By: DrAllis
Date Posted: 04 Dec 2020 at 8:56pm
| The first go-round was completely changing the driveline from the intermediate gears thru the rear axles (with the exception of the Power Director clutch itself). Then, within 2 years of that they couldn't make a 2-pinion differential last any time at all, especially on a 5-bottom moldboard plow. So, once again the tractor went back to the Dealership to receive a new ring and pinion gearset and a 4-pinion differential. Even by the time the 200 came out the differential still was not all it should have been, until the 7000 and that one held up pretty well. |
Posted By: FREEDGUY
Date Posted: 05 Dec 2020 at 4:29pm
What is the serial # break ? Ours is 2106 XTD, was gone through by the local AC dealership (rear end) via a local owner and refused to pay the tab 
|
Posted By: AC720Man
Date Posted: 05 Dec 2020 at 7:00pm
|
If a dealer upgraded a rear end, did a stamp of some sort get put on letting a person know it had been upgraded? ------------- 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: DougG
Date Posted: 06 Dec 2020 at 6:55am
| There's hash marks on the rear axle housings to distinguish it's official series 3 upgrade |
Posted By: FREEDGUY
Date Posted: 06 Dec 2020 at 4:29pm
| Thanks Doug, can you be more specific on "where" on the axles these hashes might be ?? |
Posted By: DougG
Date Posted: 06 Dec 2020 at 5:43pm
| They are about 2-2 inch, placed on the outer edge of the axle housing, some are on top, some the sides, just depended where the mechanic had them turned |
Posted By: AC720Man
Date Posted: 09 Dec 2020 at 8:43pm
 Just wondering, is this a factory stamp on my series II or a sign of an upgrade? ------------- 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: DougG
Date Posted: 09 Dec 2020 at 8:50pm
| Yup thats it,, the upgrade sign, a now modern day hash tag ! |
Posted By: AC720Man
Date Posted: 09 Dec 2020 at 9:23pm
|
That is awesome news!! It’s on both sides. Thank you!!! ------------- 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: DrAllis
Date Posted: 09 Dec 2020 at 10:03pm
| An official "Series 3" began at chassis s/n 23001 and up. Those marks may very well have been there before 23001, I don't know for sure. At s/n 9001 and up they have that larger diameter axle housing that may have had that mark on it and that sure wasn't a series 3. I say that chassis s/n 22999 had those marks on the axle and did not have the 4-pinion differential. The 4-pinion diff is the only change from the last of the S-2 to the newer S-3. |
Posted By: FREEDGUY
Date Posted: 10 Dec 2020 at 5:33pm
May I "assume" that this brand was installed with a welder ?? I thought you meant the "tech" stamped a few marks with a stamping tool  . Thanks for the picture of what to look for when I get out to the farm .
|
Posted By: DrAllis
Date Posted: 10 Dec 2020 at 6:10pm
| That's not weld. That's not a stamp. That's a casting mark. Can't be added by anyone. |
Posted By: FREEDGUY
Date Posted: 10 Dec 2020 at 6:18pm
| Well, now I'm a little confused, I read some posts that said an "upgrade" to a prior S III had mechanics "stamp" the marks ?? Or is it that the axle assemblies were part of the "inner" upgrades ? Thanks |
Posted By: injpumpEd
Date Posted: 10 Dec 2020 at 6:24pm
|
That was worded wrong. The larger axles used the new style axle housings which are identified by the cast in pound # sign. Not too complicated. ------------- 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: AC720Man
Date Posted: 10 Dec 2020 at 6:38pm
|
My hope of an upgrade went up in smoke....so no one knows for sure? ------------- 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: DrAllis
Date Posted: 10 Dec 2020 at 6:45pm
| If you are concerned as to whether your tractor has a 4-pinion differential or not, drain all the oil, pull the PTO shaft and get a small flashlite and look in the hole. At s/n 23001 and up the 4-pinion diff was STANDARD equipment. Many older tractors got a 4-pinion installed when their 2-pinion failed. How many ??? Thousands did, but as far as I know, there was not an authorized/recommended "mark" ever put on any older tractor that got updated. I've done a couple back in 1975/76 and my Bosses didn't tell me or do any extra "marking". |
Posted By: AC720Man
Date Posted: 10 Dec 2020 at 7:59pm
|
Thanks Dr, at least the next time I change my oil I will do that. Never thought of doing that to verify. Thanks ------------- 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: AC720Man
Date Posted: 10 Dec 2020 at 8:13pm
|
Out of curiosity, how long would AC warranty or upgrade the differential? Did owners receive notice by mail or was it only if a farmer had issues? My guess is they handled it like they did the 6060 crankshaft issue, not a word until a customer had an issue. Dad never received a bulletin of any type from Allis and he bought the 6060 new. ------------- 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: DougG
Date Posted: 10 Dec 2020 at 8:14pm
| Pretty sure 6060,s werent an issue,, |
Posted By: SteveMaskey(MO)
Date Posted: 10 Dec 2020 at 8:35pm
|
Like the Dr said anything can be done in
55 years. I have a old 190xt gasser 9xxx serial number and it has a 4 spider
rear end and the large axles. Was that away when I bought it 40 years ago |
Posted By: DrAllis
Date Posted: 10 Dec 2020 at 8:53pm
| 190/190XT's after s/n 9001 all had the large 3 1/4" axles from the factory. Large 3 1/4" axles were NEVER added as an "update" to any tractors under s/n 9001. Small 2 3/4" axle XT tractors were supposed to be upgraded to a harder/stronger 2 3/4" axle as a Field installed paid-for update. |
Posted By: Lonn
Date Posted: 10 Dec 2020 at 9:18pm
------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
AC720Man wrote: