Whats the deal with the 8000 line?
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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=166445
Printed Date: 01 Apr 2026 at 12:18pm
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Topic: Whats the deal with the 8000 line?
Posted By: twinsonfarm
Subject: Whats the deal with the 8000 line?
Date Posted: 08 Dec 2019 at 12:31pm
| What is the deal with the 8000 line of Allis tractors? They all seem to be lower HP than their 7000 series counterparts. Up until this point, HP always increased into the newer models? |
Replies:
Posted By: DougG
Date Posted: 08 Dec 2019 at 4:38pm
| where did you get your,info ? |
Posted By: CrestonM
Date Posted: 08 Dec 2019 at 4:46pm
|
I think he might be talking about, in example, the 7060 having 160 hp, but the 8050 having 150. Same with 7080 at 180 and 8070 at 170. I think he may be asking why did they not go from 7060 to 8060 and 7080 to 8080 or bigger.
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Posted By: DrAllis
Date Posted: 08 Dec 2019 at 5:23pm
| FWA caused engines to work much harder (because tractor was glued to the ground), so HP was de-rated to try and keep decent engine life. |
Posted By: twinsonfarm
Date Posted: 08 Dec 2019 at 6:00pm
Yup, that's how I should of worded it. Thank you.
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CrestonM wrote:Posted By: victoryallis
Date Posted: 08 Dec 2019 at 6:18pm
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They had enough issues keeping the 7080 and 7580 motors together backing things off may be prudent. ------------- 8030, 7060, six 6080’s grandpa’s D17, 8760, 8100, and 8970 Deere. |
Posted By: injpumpEd
Date Posted: 08 Dec 2019 at 6:47pm
|
They kinda re-aligned the hp ratings, in anticipation for a new 200 hp 8095. The 426 was a great engine, but really should have been made as a 466 cid engine for the 160+ hp tractors I feel. The 516 was just too big, old, and heavy, not to mention expensive, for a wheel tractor. It is still surprising they used them in the N7's. ------------- 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: NEVER green
Date Posted: 09 Dec 2019 at 8:17am
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In the 8000 they put in the heavier rods which helped. ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
Posted By: DrAllis
Date Posted: 09 Dec 2019 at 9:05am
| The connecting rod thing was two-fold. They wanted a larger diameter piston pin. That meant changing the piston from 4-rings to 3-rings to keep the overall height the same. The piston cooling was then run up thru a passage drilled in the beam of the rod itself. I assume this type of piston cooling was a little better and maybe helped with oil consumption ?? You'd think the new rod was a little stronger as well, but I can't say I ever had an old rod fail. |
Posted By: rieg
Date Posted: 09 Dec 2019 at 8:02pm
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Every 426 that I have rebuilt seemed that its limiting factor to life span was the rod bearings. Not saying that there aren't other failures but the rod bearings have always been wore out. I have a recently acquired an 8050 that has over 7000 hours and supposedly never been apart, and it looks it. I am interested to see what those rod bearing look like. Regardless I really like the 426. ------------- rieg |
Posted By: fourthgeneration
Date Posted: 09 Dec 2019 at 10:18pm
| Just better. Evolution if you will. I like that it was never intended to be an open station. Things are just improved over everything that can before it. |
Posted By: DrAllis
Date Posted: 10 Dec 2019 at 8:23am
| When you look at those 8050 rod bearing shells, the date the brg was built is usually stamped on the backside. |