301-426 vs others

In the days of the first 190XTs they were coming from the factory with more HP than the D21s. This led to the D21 series II real fast. In what was then a 5 plow class only the 19Xt was a turbo engine. Without a turbo more cubes were needed for the required HP and torque and generally their HP hours per gallon were higher

I luv those 301,s they are great enginges, the 7020 was too heavy of a tractor to make that engine cope

Also remember, the 301 and 426 were of A-C's design from the ground up. All other existing engines that they had, were inherited from Buda.

And, it's nothing to see a 175HP industrial 5.9L engine. There's been a few swapped in to 2-135/155 Whites around here, replacing the 478 Hercules lol! I've always thought those should get an 8.3L swap, but they are just chore tractors now, so don't need the reserve.

The 301 turbo never took a back seat to any 100 hp tractor. All the other cubes mentioned were non turbo engines. I agree in the 426. 150 hp that motor will live as long as any other motor out there. They needed a 550 -600 cube engine to take the place of the 426 in the 7080/8070 and 7580/4w220. I have been told the 516 worked well in the construction equipment, and combine, because they required constant rpms. But didn't hold up well in the tractor app. With the variable rpms. Couldn't have been any worse then what the 426 did over 200 hp. In my opinion.
    IG

Cost. That intercooler wasn't without a price, and not needed at 107 PTO HP.

bigal121892 wrote: I never had a problem, with the 301/426, but Allis should have stopped the 426 at the 7045/8030 horsepower level, the 426 was just to small for the 7060/8050, 7080/8070, and 7580/4W220 tractors. We had a 7010 at one time, added an intercooler, and had the injection pumped reworked for 7020 specs. Pulled an 8 row 36 IH 900 series planter for several years with that combination. The planter had liquid fertilizer, and the tractor, had 2 250 gallon saddle tanks on it. This was a load for the stock 7010, but the reworked 7010, pulled it without problems, and quite economically as well, if I remember correctly.

Huh???? The 426 in a 7060 is pretty sweet even liked it in my 7080. Never had it on a dyno but my 7080 made my uncles NH 8870 look like a child's toy. I do agree they should have done something different for the articulated tractors.

as a tractor salesman for AC when the 7020 came out, I along with the rest of the sales force let out an 'awh sheeeittt' when we got the 'word' .  But we had to sell them.  Head to head with IH 1086 and Deere 4240 we could hold our own with a power shift..  The power director was miserable on the road trying to start a load and the absence of syncros in the tranny ....  however very few 1086's and deere's were stock - they had a lot of upward potential, and we did as well... several 7020's turned close to 145hp - issue was cavitational erosion,, pinholes in the sleeves,  plagued us at higher hp long term at about half the hours others lasted ... also the copper sleeve head did not lend itself to any overheating....  it was just a bridge too far for the  day and competition.  Curse Harvey for the $$$$ it would have taken to make the 426 available .... a 426 7020 set at "125 hp, wink" would have kicked butt.... if we could have sold them and not gone broke in the process,,,, but then we did anyway,,,, duh....

I can't figure out why AC ever let Harvey plant be so independent of the main company. Who owned who for sake's alive! They should have combined the operations.

I don't think it was a question of who owned who. While I worked there West Allis was who called all the shots and getting capital from West Allis to make improvements was for all practical purposes was impossible. The improvements whether for engine updates, facilities or production machines/processes just didn't happen like it should have or needed.  

Proper tractor HP sizing should have been the 7020 (301 turbo-intercooled) at 115 HP.......7040 with 426 turbo at 135 HP......7055 with 426 turbo intercooled..........7070 with counter balanced 426 at 170 HP.......7090 with a bigger engine at 190 HP. That would have been a competitive tractor line. Deere and IH moved their 4440 and 1086 HP's up to match the 7040 and then we drop the 7040 model...DUH !!

Should have out sourced the motors in the 7080,7580 8070,4w220 4w305 and the 8550 to Cummins....Allis might still be around had those come with bigger motors

Lonn wrote: I think the demise of Allis goes much deeper than the engines

Just to be sure I nail my case closed, here is more from that same website

I'm just saying that Allis wasn't broken because of their engine problems in a few tractors.