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Say Tractor Vet-you know anything about the AC's ...

J

jal-SD

Well-known Member
.."purple people eater" engines that appeared in heavy duty trucks & subsequently disappeared without much fanfare? I've read a few things about them, but it seems there is not a lot out there. It's like that engine is almost a ghost.
 
Yea i a little , Jonic Trucking ran them in Freightliners . They were the talk of the town . they were running N/Western part of the Buckeye pulling buckets back in 76 . at that time they were the Force to recon with . Mike and i back then were still running double breasted Yamaha's till Aug. of 77 . By then we were hearing about the problems of 440 Allie Cats and he and i went with Cummins on our new trucks . The Hp. race was just really getting cranked up back then . Had my buddy and i held off a couple months he and i would have done things a little different , Like going with a longer wheel base a double SET down bunk a bigger engine and different rear gear . Hind sight is always 20-20 . BUT he and i made our little old 350 small cammers run the way we wanted them to run . The Allie Cat's were shooting stars as they came on hard and fast and burnt out fast with broken cranks and flamed out almost as fast as they came on.
 
About all I remember about the Allis-Chalmers "Big Al" truck engine are that 1) it was painted a grape-sodapop purple, 2) it packed up to 450 horsepower into an in-line six, and 3) in service, it showed an inclination to catastrophically shut down by breaking its crank and throwing rods.
 
There talking about the Allis Chalmers Truck engines. I never heard about crank problems in Caterpillars. I never had a problem with them in the many years I've been around them. Close to 40 years.
 
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