New Holland 8670 Good, Bad, Ugly

FOMOCO Farmer · Nov 29, 2021

I think I have asked this before but evidently I don't know how to use the search function. Tell me what you can about a New Holland 8670.Thanks!

Bern · Nov 29, 2021

Is it a New Holland or a Ford? Ones with Ford decals were hot from the factory and had a nasty habit of melting/cracking pistons. The NH badged machines were tamed down and shouldn't have that problem, but at the same time will be a little weak in the knees at 140ish HP.

Otherwise you'll love it!

FOMOCO Farmer · Nov 29, 2021

This one has the New Holland decal. Thanks!

Larry NCKS · Nov 29, 2021

The Genesis (70 series Ford/NH) was the best tractor built at the time. I'm not no so sure it isn't still the best tractor of all time.

I don't know, Bern, that the 8670 ever had piston cracking problems. I know the 8970s for sure did. Do you know of smaller ones that did?

I had a Ford badged 8670 to begin with. Dealer talked me into rolling it into a new lease. That was an NH badged one. The NH started much better cold than the Ford. The Ford had more umph and burned less fuel.

If there is a con to these tractors, it would be the remote valve stack. Too easy for it to get leaky and for implements and or loaders attached to it to settle easily and quickly.

Other than that, I don't know of anything I'd really call a con to these tractors.

This post was edited by Larry NCKS on 11/30/2021 at 02:47 pm.

Bern · Nov 29, 2021

I know of both an 86 as well as an 8770 that cracked pistons, both with Ford decals. They were simply too hot from the factory.

If you want your current tractor to burn less fuel, bump up the timing from the current spec of 18 to 24 which is what your first Ford model
was set at.

Larry NCKS · Nov 30, 2021

Would changing the timing also make it harder to start in cold weather? Nobody that I knew at my local dealership could ever tell me what accounted for the vastly improved cold weather startability on the later tractors. I'm talking starting without benefit of block heater, toaster or ether. (The Ford had ether assist, the NH has toaster assist. Both, of course, had/have block heaters.)

Sans assist, At 30 F, the Ford had to crank a little extra to start cold. At any temp I tried it, even well below 0 F, the NH would crack right off the first piston up on compression.

Mind you, if I knew I was going to need either of these in these kinds of temperatures, the block heater was always plugged in. My NH even has a rear sump heater from the factory, which I didn't know I was getting.

This post was edited by Larry NCKS on 11/30/2021 at 02:49 pm.

Bern · Nov 30, 2021

Generally speaking, retarded timing helps engines to start easier. And retarded timing is exactly what you have in your NH tractor, not for
easier starting, but for emissions reasons. So, if you bump the timing up 6 degrees from 18 to 24, I would expect you to lose a little bit in
the ease of starting department. But the tradeoff with regards to increased power and fuel economy would be worth it.

New Holland 8670 Good, Bad, Ugly

FOMOCO Farmer

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Bern

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FOMOCO Farmer

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Larry NCKS

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Bern

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Larry NCKS

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Bern

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