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4020 PTO

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Smitty

04-16-2003 08:38:36




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I just bought a 65 4020 with a power shift trans. The pto was working fine, but now it keeps spinning. Could it out of adjustment,or is it the pto brake. I tried to stop the shaft from spinning with the pto disengaged. It would not stop.

does anyone have an idea




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davidval

04-17-2003 02:55:39




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 Re: 4020 PTO in reply to Smitty, 04-16-2003 08:38:36  
also check operating linkage. sometimes there is wear in the sheet metal arm that connects to the shaft going into the valve. remove the panel below the steering wheel, and observe the bottom part of the linkage.
david



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JDJIM

04-16-2003 19:44:12




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 Re: 4020 PTO in reply to Smitty, 04-16-2003 08:38:36  
The early powershifts had more problems with pto running on than later models . I have a 3020 and a 4020 both 64's had the same problem , bought both of them used . It's not an easy fix , I fixed both of mine and a neighbors 64 4020 . The dowell pin that holds the brake is smaller on the early models , they have or had then an improved brake with a larger pin . The pin usually is snapped off . Problem is you have to split the tractor twice , at the clutch housing and then remove the front part of the trans housing ie. the platform etc . Also there is a later improved set of disks for the pto clutch pack , they are a wavy type that lets the oil out easier . I took the whole clutch pack out and replaced them too , when split at the clutch housing the clutch pack comes out easily and if my memory hasn't failed I think the clutch pack has to come out to get the trans housing apart . It's been 15 yrs since I've done one . The parts at the time were probably $3-400 , did the work myself , Deere quoted my neighbor around $3000 at that time . There is a lot involved , unless you know what you are doing and have the shop manual I don't know if I'd tackle the job . You be the judge . I went on a lot hope I didn't confuse you too much , if you have any questions email me or post back , I've don a litle with powershifts , be glad to help , Jim

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jeff

04-16-2003 18:22:59




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 Re: 4020 PTO in reply to Smitty, 04-16-2003 08:38:36  
My 1969 powershift is same as yours and Davids'. Like David from Kansas, I've learned to live with it. I use my tractor exclusively for haybines and balers, and there is enough resistance to keep it from spinning. Also, my nephew is JD mechanic and said the same thing about having to split the tractor. Hey, you still have a great tractor!



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David from Kansas

04-16-2003 12:12:24




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 Re: 4020 PTO in reply to Smitty, 04-16-2003 08:38:36  
Smitty, I have a 4020 just like yours, same year, power shift. My PTO started this same trick several years ago, my son, who is a JD mechanic says it is the PTO brake. My PTO stops under load, i.e., when I hook it up to something that has some resistance, like my grinder/mixer. I've just learned to live with it as my son says he has to split the tractor to replace the PTO brake. I just shut the engine off whenever attaching or detaching the PTO. There is a safety factor here in that you don't want to be working on a PTO driven implement while the tractor engine is running as there is a chance the PTO could start turning and get you caught up in something. Certainly don't want that to happen. Just use common sense. Hopes this is helpful. David

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Smitty

04-16-2003 12:46:34




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 Re: Re: 4020 PTO in reply to David from Kansas, 04-16-2003 12:12:24  
Thanks David from Kansas,
I am afraid it is the pto break. I did not know you had to split the tractor to install it. That sounds expensive and more than I am able to do on my own.

Smitty



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