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allis h4 or h6

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=138516
Printed Date: 03 Aug 2025 at 9:24am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: allis h4 or h6

Posted By: pinball
Subject: allis h4 or h6
Date Posted: 17 May 2017 at 6:55pm

What is the biggest difference between an allis h4 and and an an allis h6. thanks norm

Replies:

Posted By: Lee Bradley
Date Posted: 17 May 2017 at 8:23pm

For me the HD-6 has oscillating tracks and the HD-4 doesn't.

Posted By: pinball
Date Posted: 17 May 2017 at 10:25pm

what does oscallating mean.

Posted By: Lee Bradley
Date Posted: 18 May 2017 at 1:26am

The front of the tracks can move up and down independently of one another so on uneven ground more track stays on the ground.

Posted By: DMiller
Date Posted: 18 May 2017 at 6:46am

That depends, on later units as my HD7G and late HD6G they had a solid crossmember instead of a spring. In general a 6 will outweigh a 4 by near to twice, there is an advantage for digging or pushing material that comes with weight, also a disadvantage as far as sinking one in soft soils(mud). A six will have half again the horsepower but twice to three times the torque if get a Allis/Buda four stroke diesel engine while the Detroit Diesel did have HP they lacked some in torque being two stroke.

Posted By: Coke-in-MN
Date Posted: 18 May 2017 at 11:16am

H4 is a small industrial machine - either gas or diesel - had a 2200 engine and a 3 speed transmission - it uses a shuttle clutch for fwd and rev movement . Also uses a single reduction rear drive with the sprockets mounted to axle supported by inner and outer Timken cone and cup .

The HD6 is a much heavier machine with Diesel engine and multi-gear transmission the rear reduction is through 3 gear system with rear axle supported by outboard as well as 2 inner bearings . It is a full CONSTRUCTION grade machine capable of many function .
Both machines are now next to impossible to find track for as no one produces it now in that pitch .
The HD6 uses the same final housing as the HD5 as well as undercarriage parts but with a longer truck frame and 2 or more links in track .

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: pinball
Date Posted: 18 May 2017 at 4:08pm

very interesting, I thought about buying a dozer I have an h4 loader that I use sparingly. parts do seem to be a problem. I wanted to replace my hood on mine. stopped by a place down around versailes. He had 5 of them laying In his yard. Offered him 50 bucks for one. he said 125 so I will look else where. I guess if he had just one I might understand these people some but how many people do you think are looking for a hood for an allis h4 crawler. probably just me. Anyway thanks to you all for the information. Have a good day. Norm

Posted By: michale34
Date Posted: 19 May 2017 at 8:42am

People do that .I understand if its a hard to find part and a lowball offer . but like the hood deal I knew a old man that had some donor tractors he wanted 3 times what parts was worth . he always claimed how he wasent making any money . so when he died his son took everything across the scale for 7 dollars a hundred but by then most of the parts had set in the weather long enough and scrap is what they were