70 john deere gas

GreenBlood · Apr 24, 2014

looking at a nice john deere model 70 gas ,, It has a taber lock on the flywheel. tractor runs good . Will this effect price very much? thanks

buickanddeere · Apr 24, 2014

Worth more than a 70 gas with a loose flywheel.
Somebody must have really messed up torquing the flywheel at one time. Usually it's just the 70/720/730 diesels that suffer flywheel problems after a failed torquing.

gtx1967jewison · Apr 24, 2014

I've seen lots of 60's & 70's, & even a few a's & B's with loose flywheels. Seems the only ones that did not fail were the standards, with the keyed 'wheel, like the D, R, & 80/820/830. I think the straight splines were just a bad plan, perhaps did not squeeze down right, or too much variance in machining. At any rate I think it's not just the ones with bad wrenches on em that failed.

Blksmok · Apr 25, 2014

If you intend to use it and keep it for a long time it doesn't affect the price you pay for it. When you come to resell it the taper lock is an indication it has a worn crank and had problems in the past. There's enough good 70 gas models out there with original FW's. Everything being equal I prefer the original FW's.

Mike M · Apr 25, 2014

I never could figure out why Deere started out with keyed flywheels in the VERY early D's and then went away from them for all those years except in the largest models ?

buickanddeere · Apr 25, 2014

Nothing really wrong with the splines and two clamping bolts. Problem was that Bubba would remove the flywheel or adjust the end play . Then attempt to re torque the old used fasteners without a torque wrench .
The by guess and by by golly torquing technique either under torqued the bolts and flywheel would shake loose. Or the bolts were over torqued, stretched and would fail to clamp the splines right enough.
If new bolts had been used and a torque wrench. Loose flywheels would be the topic of rumour and tall tales.

GreenBlood · Apr 25, 2014

Thanks guys

coonie minnie · Apr 25, 2014

Agree whole-heartedly. There is a reason taperloks are common on 70 gas tractors. It seems those that you mentioned, 60-70 and late A and B with the outside flywheel bolts were very susceptable to loose flywheels- maybe from poor torqueing, but I've seen'em that haven't been off in years develop a crack, too.

Mike M · Apr 25, 2014

I'm sure just as many "Bubba's" worked on the R,80,820,830 but I have not heard of them having issues with loose flywheels. So there's got to be more to it than that.

Mike Aylward · Apr 25, 2014

We have had two-cylinder tractors on this farm since the 40's. We have ran all the series of tractors except the big standards and Dubuque tractors. In all that time there never was a flywheel that came loose. The original flywheel on the A did crack but was quickly replaced by a new one. Have never had a flywheel come loose. Never. They were tightened "tight" and were never torqued. The splines were always sterile and the bolts were evenly tightened. I don't believe in the theory that some models have any inherent problem. Most likely they were not tightened enough or properly and were ran loose at some time. Once this happens then you WILL have flywheel problems. We've had to fix others stumbles for years. I have two 70's, one that is used for farm duty and the other a highly modified pulling tractor. They both have the original flywheels on them and have never given any trouble. A tractor with a taperlock flywheel would be heavily discounted by me. In fact, I wouldn't even buy it. It's a patch on someone else's lack of maintenance. Mike

Mike M · Apr 25, 2014

add loose clutch drivers to that same category.

70 john deere gas

GreenBlood

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GreenBlood

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