HD7 ENGINE CONVERSION
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=159673
Printed Date: 19 Aug 2025 at 3:38pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD7 ENGINE CONVERSION
Posted By: AC Mel
Subject: HD7 ENGINE CONVERSION
Date Posted: 05 Apr 2019 at 11:59am
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Ok..thought we should share this with you. Our friend Dennis Gullick..who is better know as a Cletrac collector....also has a Allis Chalmers HD7 in his collection.He's had it for many years and the engine was tired when he got it. Having trouble finding the parts he needed to work on the 371....he found a late model 471..with turbo! that he couldn't pass up  So with modifications to the main frame...fabricating a spacer..he was able to use the same frame.  The bellhousing bolted together ok  The original radiator was used.  We found a dry type air cleaner off a HD11B SERIES direct drive farm tractor (one of our donor tractors) that looked like it would work.  Might have to tow a portable generator to run these antique lights that look like they belong on there.  The hood had to be extended and modified to fit...also some different side panels.  So this is the end game. To be able to pull his Allis Chalmers C44 scraper. We also were able to find a better rear hydraulic unit (BEGE)from a HD9 donor tractor that we have.  This is the same scraper that we pulled with our HD6E in 2011 when we started cleaning sediment from our pond...or the "Allis Chalmers Playground" as we call it LOL...should be some posts back there some where.   |
Replies:
Posted By: JC-WI
Date Posted: 05 Apr 2019 at 1:29pm
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Dang!!! that garden hose out front there sure sprung some serious leakage!!! Now were you boys going to scrape the water up??? Sure is cool to see what others can do... wonder if he could have tucked the air cleaner under the hood and left a 'clean-out' hole in the there on the right side and poked the stack through the hood... It has to sound cool with that turbo on her. Any videos of her runnin? Thanks Mel ------------- He who says there is no evil has already deceived himself The truth is the truth, sugar coated or not. Trawler II says, "Remember that." |
Posted By: tadams(OH)
Date Posted: 05 Apr 2019 at 3:00pm
| Good looking job |
Posted By: Mactractor
Date Posted: 05 Apr 2019 at 6:34pm
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Excellent. Well into the 'hot rod' division. Up there with Tad's 6V71 powered HD11B. |
Posted By: DMiller
Date Posted: 05 Apr 2019 at 7:05pm
| SWEET!! |
Posted By: NomoreJohnDeere
Date Posted: 06 Apr 2019 at 7:26am
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nice scraper ------------- HD3 |
Posted By: ACcrazy
Date Posted: 06 Apr 2019 at 3:04pm
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Nice job, Mel! |
Posted By: Lee Bradley
Date Posted: 06 Apr 2019 at 4:54pm
| Very nice! Drive train should hold up to that power as a towing machine but put a dozer on it and not so much. Double the HP? |
Posted By: SteveM C/IL
Date Posted: 07 Apr 2019 at 9:15pm
| any "T" on a Detroit is added cool factor. Had a 8V92T in a cabover IHC. Was an impressive combo! Low end grunt and quick! Would horse a load down the road too! |
Posted By: shameless dude
Date Posted: 09 Apr 2019 at 11:13pm
| I love it when you guys gits together and do something positive! good job! and I see yer buddy drives a good truck too! i'll forgive him if he says that green thing belongs to a neighbor! |
Posted By: Tad Wicks
Date Posted: 10 Apr 2019 at 10:29am
Well done, it looks great, funny, take off the exhaust and with the extended hood it has almost the same lines as a 14, just a bit smaller. The HD 7s didn't have a great reputation around this area and I don't know why, most of them like this one has some trouble with the track frame bushings, same with the 10, but I like my 7 and for me, nicer to run than a D4, something with my feet and the brake pedals. What is next a 6V53 in an "M"? |
Posted By: HD6GTOM
Date Posted: 10 Apr 2019 at 7:50pm
| Thank you for posting this. Very interesting to see these. |