7000 series 4wd?
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=27164
Printed Date: 27 Feb 2025 at 2:26pm
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Topic: 7000 series 4wd?
Posted By: Peterson
Subject: 7000 series 4wd?
Date Posted: 11 Mar 2011 at 11:39pm
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anyone ever seen one or made one? what would you have to do? or would ya just put the older sheet metal on a 8000 series tractor. id think they would look pretty awesome. but thats just me. ------------- 7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2 |
Replies:
Posted By: kip in cny
Date Posted: 12 Mar 2011 at 12:31am
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I seen a 7020 4 wheel drive. It looked nice I dont know who made it. Its on a farm in groton NY. ------------- 160 CA 920diesel 5020 HD-3 |
Posted By: DrAllis
Date Posted: 12 Mar 2011 at 7:21am
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"Mud-Hog" company made hydraulic driven front axles for the 7000 series that utilized the tractors existing main hydraulic pump. To have a driveshaft driven front axle would require an 8000 series FWA rearend. |
Posted By: Russ-neia
Date Posted: 12 Mar 2011 at 8:52am
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Norm denies it, but surely they had to have some 7000 series prototypes to test the FWA before introducing the 8000 series? The rear housing on the 70 was designed for FWA, just not machined out and no gears inside. There is a plug where the driveshaft would come out. ------------- The innovators offer what others will imitate. |
Posted By: DSeries4
Date Posted: 12 Mar 2011 at 9:44am
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One of Norm's books states that 4wd was planned for the 7000 series, but was shelved to move the 7000 series project along more quickly. There was also a picture of a prototype from around 1970. Would have been good if they had it available when the black bellies came out. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: 427435
Date Posted: 12 Mar 2011 at 10:19am
I arrived in the tractor engineering department in 1977. As posted above, we worked with Mud Hog for an aftermarket kit for the 7000's. Part of the reason that FWD wasn't pursed harder with the 7000's was that the FWD axles available then didn't have as sharp of steer angles as those developed in the late 1970's. The prototype 8000 tractors were totally prototype 8000 tractors complete through the cab and engine hp settings with FWD axles from Sige in Italy that had sharper steer angles. One interesting tale for the testing of the FWD 8000 tractors was getting a call from the test department that there was a major problem. They had gotten into a field condition where the tractors were hopping terribly. They thought the gear/tire ratio between the front and back was the problem. I went out to the field where a big disk was being pulled in some sandy, dry soil conditions. Yes, the tractor would start hopping if the disk was set deep enough. Of course, if you turned the FWD off, the tractor would just spin out all together. I had them do some slip testing and it turned out that the wheel slippage was well over 15% when the hopping started. We knew from previous testing with the big 4WD tractors that they would hop also if tire slippage got over 15%, so I stopped worrying about it. It did get me out of the office for a day, however!! ------------- Mark B10 Allis, 917 Allis, 7116 Simplicity, 7790 Simplicity Diesel, GTH-L Simplicity Ignorance is curable-----stupidity is not. |
Russ-neia wrote:Posted By: injpumpEd
Date Posted: 12 Mar 2011 at 1:56pm
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the hopping is from radial tires isn't it? They don't like to spin smoothly like a bias. They are always trying to grab traction.
------------- 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: Steve M C/IL
Date Posted: 12 Mar 2011 at 3:05pm
| Hopping happens with both bias and radial.Conditions in practice make the difference to hop or not. |
Posted By: 427435
Date Posted: 12 Mar 2011 at 6:34pm
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Hopping will occur (regardless of tire construction) on a 4WD vehicle when slippage gets too high (unless it's on ice). LOL
------------- Mark B10 Allis, 917 Allis, 7116 Simplicity, 7790 Simplicity Diesel, GTH-L Simplicity Ignorance is curable-----stupidity is not. |
Posted By: Russ-neia
Date Posted: 13 Mar 2011 at 9:56am
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Mark, do you have any photos of the 7000's with the Mudhog or any of the 8000 prototypes? They are more my vintage and what we still farm with, so I love seeing/learning more of them. ------------- The innovators offer what others will imitate. |
Posted By: Peterson
Date Posted: 14 Mar 2011 at 12:04am
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yeah i would love to see some pics of them. ------------- 7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2 |
Posted By: Byron WC in SW Wi
Date Posted: 14 Mar 2011 at 7:48am
| 427425 - That's interesting to hear stories from that time and also for the information. Sometimes my tractor will hop and now I know why. |
Posted By: 427435
Date Posted: 14 Mar 2011 at 10:18am
Sorry, but I don't. I was never that impressed with the Mud Hog as the efficiency of the hydraulic drive was not good. It was really only useful in muddy conditions-------not normal field work. I also didn't take many (if any) pictures of the 8000 prototypes except the 8095 that I've previously posted here. I knew the 8000's would go into production, but that the 8095 (should have been called 9025 or 8225) was a long shot when I did take a picture of it. ------------- Mark B10 Allis, 917 Allis, 7116 Simplicity, 7790 Simplicity Diesel, GTH-L Simplicity Ignorance is curable-----stupidity is not. |