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HD31

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=101930
Printed Date: 13 Jul 2025 at 9:21am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: HD31

Posted By: OrangeKiwi(NZ)
Subject: HD31
Date Posted: 14 Feb 2015 at 1:20pm

What model of Cummins engine operated the HD31 ? Was there more than one model over the 31's production cycle ? TIA.

Replies:

Posted By: HD6 Merv
Date Posted: 14 Feb 2015 at 2:30pm

KT1150 powered the HD31; 6.25' bore and stroke 6 cyl cummins. 425 hp I think. Were a very common and reliable motor from all reports. Was even a few kenworth W900 series here in nz with KT525 power

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tits tyres and tracks

they all cost you money

Posted By: OrangeKiwi(NZ)
Date Posted: 14 Feb 2015 at 4:14pm

Thanks Merv. That's what I thought too (KT1150) All my reference books and sales brochures state that. It's just that I'm having a discussion elsewhere and a person is stating that a Cummins K19 powered the HD31. Are you familiar with the K19 engine ? I thought it was a marine engine ?

Posted By: Mactractor
Date Posted: 14 Feb 2015 at 5:38pm

K19 is the later metric designation for the 1150 (19 liter) Ross. They were not known as K19`s back when 31`s were produced though

Posted By: steve(ill)
Date Posted: 14 Feb 2015 at 6:07pm

The HD 31 tractor later became the FD40 (Fiat Dozer designation) ... same motor

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Like them all, but love the "B"s.

Posted By: SteveM C/IL
Date Posted: 17 Feb 2015 at 9:40pm

Neighbor had an old Freightshaker with a KTA1150. It was 600 or 650 Hp