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John Deere Tractors Discussion Forum
Show Parts for Model:

John Deere 420 3-point creeps UP

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DoubleO7

02-13-2018 17:21:44




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The thread about a 520 3-point creeping down reminds me to ask:

When running my 420 with the pto driven woodchipper on the 3-point, I have to tie a rope on the single Touch-O-Matic.

To keep the chipper on the ground, otherwise it wants to rise in little jerks until it is up all the way.

Any ideas what to investigate?




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jd2cylman

02-14-2018 15:07:07




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
Quoting Removed, click Modern View to see

I have a early 420U which also has just the single touch-o-matic.
I could see the friction disc being loose causing the lever to go down, but he said the lever creeps up. That has to be more due to a improperly set feedback spring like B&D suggest. Or possibly a leak in the lift valve circuit?



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buickanddeere

02-14-2018 08:27:06




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
How much spring pressure is there on the top link feedback ?



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James Howell

02-14-2018 06:56:26




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
"I have to tie a rope on the single Touch-O-Matic."

Agree with Dave H on the friction disks.

Take a look at the TOUCH-O-MATIC QUADRANT ASSEMBLY Standard diagram below.

Note the friction disks (Key 21).

Hope this helps.

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DoubleO7

02-14-2018 06:45:05




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
it is a 420S, maybe why it only has the single lever.



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DoubleO7

02-14-2018 06:42:55




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
Yes, only one lever for the 3 point.

Has five speed but not the optional live pto, just tranny pto.

I have not had it a year yet and just started using the chipper.

I will check out the friction disc, thanks.

P.S. can chip hard green limbs in the 5" dia. range. Gives the 420 a good workout, Sometimes you have to play with the chipper feed handle to catch it in time before it stalls out.

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Dave H

02-14-2018 04:57:30




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
Doesn't your book show friction disks for that assembly?

I had to replace mine.

However, mine like most i have seen was a dual TOM.



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mr.precision

02-14-2018 04:53:24




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
You wrote " single touchomatic".....so you have only one lever for the 3 point? Didn't know the 420 came in that configuration. If you have 2 levers, I can help with your concern.



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Mike M

02-14-2018 04:50:30




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 Re: John Deere 420 3-point creeps UP in reply to DoubleO7, 02-13-2018 17:21:44  
If the lever is moving then I think there would be a friction spot you can adjust it tighter.



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