7040 puller torque limiter
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=206388
Printed Date: 28 Apr 2025 at 9:39am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 7040 puller torque limiter
Posted By: Mattman
Subject: 7040 puller torque limiter
Date Posted: 21 Apr 2025 at 9:36am
| I have the engine all buttoned up on my 7040 powershift and ready to do some pulling. From the feedback I have received from just about everyone, It looks like I need to do something with the torque limiter. Seems like most pullers are bolting the limiter solid while a few are using the double belleville washer setup. Has anyone ever actually experienced trans damage from bolting it solid? My 7040 has low hours and is in really nice shape so the last thing I want to do is put the transmission at risk. Does the double belleville washer setup actually allow it to slip or is it a fancy way of making it solid? Is a powershift at more of a risk or less of a risk when bolted solid? I will be splitting it this Friday. I could use some direction. I'm estimating my tractor will have around 300 hp. It will be strictly farm stock. Thanks all. |
Replies:
Posted By: Kip-Utah
Date Posted: 21 Apr 2025 at 11:47am
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You should also post this in the Tractor Pulling section. ------------- HANSEN'S OLD ORANGE IRON. Showing, Pulling, & Going!! |
Posted By: tbran
Date Posted: 22 Apr 2025 at 12:35pm
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You can spend what you want - I - for 300 HP - would double the Belville washer and add a washer under the spools the same thickness of the washer using a 4 disc limiter. For 400 hp and up? that is a different story - the other clutches are now suspect. My 2 cents. ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: SteveM C/IL
Date Posted: 22 Apr 2025 at 1:05pm
| Nice low hour tractor you don't want hurt.....and you're going pulling? Those 2 seem diametrically opposed. |
Posted By: Mattman
Date Posted: 22 Apr 2025 at 4:11pm
SteveM, I'm throwing an awful lot of money at a decent old tractor in an attempt to win just enough money to cover my cold ones and the fuel to do so. The whole thing is driven by my ego and completely asinine. I at least take pride in knowing I am self-aware of my stupidity. Something about it is hard to walk away from. Maybe I am just sick of watching green and reds and all their smiling faces. Not too many orange ones up where I am from pulling anymore, at least that's the argument I gave my wife after she asked for a new couch but got a new built DM4 pump instead. You should have seen how happy she was 
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Posted By: tbran
Date Posted: 22 Apr 2025 at 4:26pm
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Suggest you tighten the springs in the couch or otherwise her happiness may could be more expensive than the DM4, or an A or P pump.... her torque will have no limiter... ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: injpumpEd
Date Posted: 22 Apr 2025 at 4:40pm
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Sounds like the "couch" may be your bed lmao! I put bolts in my flywheel to act as lugs to prevent the disc from ever slipping, but my 7040 is a PD, similar TL though. I used the 8 pad HD one. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: Mattman
Date Posted: 27 Apr 2025 at 1:11pm
| This actually gives me a great idea, Ed. I am decent at machining and metal work. I wonder if I built a large Lovejoy type coupling that would allow the transfer of torque, yet cushioning it at the same time. Sort of like a 175 front pump driveshaft coupling just huge with four polyurethane bushings |
Posted By: injpumpEd
Date Posted: 27 Apr 2025 at 3:22pm
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The stock heavy duty disc has torsional absorbing springs. I had my machinist buddy make me a pilot tool, then he centered the disc on the flywheel and drilled and tapped the flywheel surface for the 6 allen head bolts. Had to turn the heads down some so they were below the disc surface. The bolts fit nice in the holes in the disc, the HD 6 pad is a full circle with 6 slots, and at the end of each slot is a hole we put the bolts into. They are driving lugs, not bolted anything together. I figure at some point it'll tear the center out on a sled pull lol! ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: Mattman
Date Posted: 28 Apr 2025 at 7:10am
| Your correct Ed. I did not take in account the torsion springs when my revolutionary thinking surfaced. |