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HD7 info

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=116550
Printed Date: 24 Jul 2025 at 12:56pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: HD7 info

Posted By: one54dodgetruck
Subject: HD7 info
Date Posted: 23 Dec 2015 at 7:08pm

Picked up a HD7 today. Is there a place online that has info on this machine?

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2 WDs
B
B112
D14
D15 shuttle
180
185
7040
Hd7w
D14
D15
185
7040 pd

Replies:

Posted By: CAL(KS)
Date Posted: 23 Dec 2015 at 8:32pm

some generic info with production dates

http://www.tractordata.com/farm-tractors/003/0/7/3074-allis-chalmers-hd7w.html" rel="nofollow - http://www.tractordata.com/farm-tractors/003/0/7/3074-allis-chalmers-hd7w.html

if you want detailed information, norms construction book is the best

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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15

Posted By: Cad
Date Posted: 23 Dec 2015 at 10:38pm

I dont know much, but pushing a pile of dirt uphill and you kill it, your 3-71 will run backwards.

Posted By: Old Timer
Date Posted: 26 Dec 2015 at 8:20am

Posted By: gemdozer
Date Posted: 26 Dec 2015 at 11:53am

Some HD7 have a DETROIT 371 and some HD7G with 4 cylinder 344 ALLIS CHALMERS no turbo and some with and HD7GB with 6 cyl. 3500 motor

Posted By: Cad
Date Posted: 26 Dec 2015 at 7:54pm

The unit I had was a 1948 HD7W (wide) and spent the first lifetime pulling a scraper for Des Moines County, Ia. We put a Baker Blade on it and used the rear hydraulic unit for lift power. When it lurched backwards that day and started up the wrong way, smoke came out of the oil bath air cleaner and it sounded funny. Pulling the clutch I was surprised to go backwards. I killed it, restarted and pushed the pile up the hill, this time at a higher RPM.