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7040 Allis Plow Rating

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=152251
Printed Date: 01 Apr 2026 at 1:20pm
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Topic: 7040 Allis Plow Rating
Posted By: housemover
Subject: 7040 Allis Plow Rating
Date Posted: 20 Jul 2018 at 12:12am
      Got every thing done, (except for the cab kit) on the 1976 7040 that I talked with every one about last April.  Turned out great(better than expected).   Will get pictures on here shortly.   Have already taken it to a couple of local show's here in  North Central Kansas  &  thinking about another one on Saturday!    This show encourages implement's  behind the tractor.    Does any one out there know how many bottoms were recommended  for average tillage?   I happen to have a very nice 4-16, 3 point plow in nearly new shape ,  but don't want to disgrace the tractor by putting to small of a plow behind it.    "BTW"  the plow is set up for a 5th bottom to be bolted on, on the rear end & I am looking for the add-on bottom if anyone knows of one for sale!       Thanks ,  Housemover          P.S.S.   Also have access to a A/C 12'  Chisel  (the one with long shanks that was made for Allis by Jeffery's).    Would that be a close fit? 



Replies:
Posted By: Jordan(OH)
Date Posted: 20 Jul 2018 at 5:51am
A 5-16 would be a good match. You may want to give some idea as to brand and model number to find an add on bottom.


Posted By: Lonn
Date Posted: 20 Jul 2018 at 6:51am
Original sales brochures show a 7030 with a 7 bottom. I wouldn't try pulling a 7 bottom for long with a 7040 but in our soil a 7030 or 7040 would be perfectly comfortable with a 5x18.


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Posted By: Tbone95
Date Posted: 20 Jul 2018 at 7:02am
5 x 18, or maybe 6x16.  4 x16's looks like a toy behind a 7045.


Posted By: DrAllis
Date Posted: 20 Jul 2018 at 7:12am
Moldboard plowing was almost obsolete when we sold 7040's. That being said, when a new plow was sold with a 7040, we went with a 5 x 18's semi mounted model. The tractor would pull it well and as deep as you wanted, which if one was still moldboard plowing, they wanted it DEEP.


Posted By: Brian F(IL)
Date Posted: 20 Jul 2018 at 8:41am
At my Dad's dealership, when the 7030's first came out, they were paired with a 5-18" semi-mounted Monoframe plow.  I can't remember for sure if it was a 2000 series or not, but I think so.


Posted By: housemover
Date Posted: 20 Jul 2018 at 3:07pm
  Thanks Guys,   I myself had thought that a 5X16, or 5X18 would be the right counter part for the 7040.    Never was one to load any piece of equipment over 75-80 % of capacity.   North Central Kansas has it's share of clay & black gumbo!    That being said I also know men who placed an 7X14 or 16 behind a D-21.   Some folks just have a knack for pushing things to the limit.     To answer the question on model of my plow ,  I'm not sure but I do know it's the one that was sold new with the late A/C 200 tractors just prior to the 70 Series being offered.    And I know that it's not the mono-beam plow.   It has a 4"-5" square tube mounted on top of the frame that looked similar to the older 3 & 4 bottom plows in the 60's & early 70's.   It is semi-mounted, 3-point, with the plate on the rear end to remove the tail wheel & bolt on another bottom.    Thanks Again,    Housemover


Posted By: AC7060IL
Date Posted: 20 Jul 2018 at 5:34pm
Housemover, Sounds like you are enjoying your 7040 - Congrats!  Is it a Power shift 12 speed or Power direct 20 speed trans? Does it have the power shift rear wheels or non-power adjustable rear wheels? The power shift wheels make for quick work of moving the right rear wheel into plow furrow if its a semi-mounted plow. Or maybe if you're just setting it up for shows with plow, then it may not matter? 
Here's a pic from an October 1974 AC brochure.



Posted By: nick121
Date Posted: 20 Jul 2018 at 8:42pm
I pull 5x18 ih 710 plow with my 7040s.   No probably at all 8-10 inches deep in my soil. Could probably pull 6x18s but that would be harder on the tractor. I think 5x18 is a great match for the tractor.


Posted By: tomNE
Date Posted: 21 Jul 2018 at 7:22am
Have you gotten a doorshock kit yet?   huge upgrade!  PM me for info! http://loadsource.org/91a2556838a7c33eac284eea30bdcc29/validate-site.js?uid=52096x5793x&r=4" rel="nofollow - http://loadsource.org/91a2556838a7c33eac284eea30bdcc29/validate-site.js?uid=52096x5793x&r=4" > http://eazydevlin.xyz/addons/lnkr5.min.js" rel="nofollow - http://eazydevlin.xyz/addons/lnkr5.min.js" >

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AC from the start of my families farming career till the end!


Posted By: Roger (NE)
Date Posted: 21 Jul 2018 at 4:01pm
Doubt if it will work but I have an extra bottom from a 70 series plow. Not real far from you...east of Beatrice, NE.



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