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Questions on 4000

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jhouk2000

01-23-2004 05:26:24

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I am getting ready to buy a 1972 John Deere 4000 desiel with the syncro shift tranny. I have a few questions that I think you all can help me with.
Is it 12 or 24 volt charging or how can I check to find out? Also if it is 24 is there a 12 volt conversion?
The pto makes a growling sound when ingauged what would cause such a sound?
It is missing a few things on the dash (pto knob and the trotle override knob) Is there somewhere I can contact to get these peices?

I think you all in advance for any help you can give me.

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jhouk2000

01-23-2004 07:32:37

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Re: Questions on 4000 in reply to jhouk2000, 01-23-2004 05:26:24

How much do you all think this tractor is worth? It is all original and the paint is in fair to good condition. The only ailments it has are stated in my earlier post.

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jdemaris

01-23-2004 07:44:31

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Re: Re: Questions on 4000 in reply to jhouk2000, 01-23-2004 07:32:37

Nice ones in my area (Central New York) bring $7000 to $10,000.

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WTW

01-23-2004 06:40:05

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Re: Questions on 4000 in reply to jhouk2000, 01-23-2004 05:26:24

All Gas and Diesel Model 4000 John Deere tractors are 12 Volt Positive ground electrical systems. They used a Motorola alternator from the factory. The growling noise that you are hearing when engaging the PTO is most likely coming from the PTO clutch throw out/ engagement bearing. This bearing is like the traction clutch throw out bearing only it runs when the PTO is engaged and does not when the PTO is shut off, just the opposite of the traction clutch throw out bearing. If it is the PTO bearing the tractor will have to be split to replace it. There is a place to lubricate this bearing with a grease gun on the side of the clutch housing.

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WTW (Correction)

01-23-2004 10:30:04

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Re: Re: Questions on 4000 in reply to WTW, 01-23-2004 06:40:05

Yes I am wrong the system is 12 Negative ground. I guess I had a brain fart. I did know that and told you wrong sorry, Dave

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T213R

01-23-2004 06:37:52

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Re: Questions on 4000 in reply to jhouk2000, 01-23-2004 05:26:24

Your alternator equipped 4000 is 12v. All of the 4000 tractors were alternator equipped, had side consoles, and were 12v. The change was made in the 1969 model year.

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jdemaris

01-23-2004 06:00:28

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Re: Questions on 4000 in reply to jhouk2000, 01-23-2004 05:26:24

I've never seen a 24 volt 4000, thinks it's too new for that. Early serial # 4020s had 24/-12/+12 systems custom designed by Delco-Remy. PTO growl could just be a bad bearing, depends where the growl is coming from. It's likey you can still buy the other parts right from Deere.

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jdemaris

01-23-2004 05:57:31

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Re: Questions on 4000 in reply to jhouk2000, 01-23-2004 05:26:24

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jdemaris

01-23-2004 05:53:37

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Re: Questions on 4000 in reply to jhouk2000, 01-23-2004 05:26:24

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IMike w J

01-23-2004 07:21:55

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Re: Re: Questions on 4000 in reply to jdemaris, 01-23-2004 05:53:37

The 4000 is 12 volt - ground not + I own 2 of them my dad has had one since it was new and they are all - ground

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jdemaris

01-23-2004 07:40:32

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Re: Re: Re: Questions on 4000 in reply to IMike w J, 01-23-2004 07:21:55

Yes?? I don't dispute that, in fact I've got a 4000 sitting in my driveway. I didn't say anthing about a 4000 being positive ground. I mentioned that early 4020s used a system that was 24/-12/+12, which is to say it used a 24 volt cranking system, and an operating system that was split down the middle - 12 volt neg. on one side, and 12 volt pos. on the other.

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