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Discussion Forum
Show Parts for Model:

John Deere 4020 seat

Author 
Mark B

03-10-2002 07:35:00
199.120.106.200



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I recently purchased a 4020. I believe it is a 1968 or 1969. When driving down the road the seat bounces and feels like it bottoms out for a rough ride. How does the adjustments work? What do i need to do? I'm getting kinda sore. Any info is greatly appreciated. Thankyou




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Sam H.

03-11-2002 02:32:16
209.14.88.136



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 Re: John Deere 4020 seat in reply to Mark B, 03-10-2002 07:35:00  
Also make sure there isn't a buildup of dirt under the linkage of the seat limiting travel.



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G Taylor

03-10-2002 12:12:36
64.10.143.1



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 Re: John Deere 4020 seat in reply to Mark B, 03-10-2002 07:35:00  
Right about now my Grandfather would ask what's the problem & why spend the time and money to repair,it still runs. Still better than the old steel seat they used to sit on he would say. Next story would be how much snow they had to walk through to go to school.



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Mark B

03-10-2002 11:46:36
209.152.127.66



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 Re: John Deere 4020 seat in reply to Mark B, 03-10-2002 07:35:00  
Thanks for all the ideas. Will see which one does the job. Thanks



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Lloyd

03-10-2002 10:26:24
209.221.45.237



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 Re: John Deere 4020 seat in reply to Mark B, 03-10-2002 07:35:00  
4020`s do have a shock absorber in the seat. It is inside the coil spring. If it is shot it allow`s the seat to bottom easily on large jolts.



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John in Md.

03-10-2002 09:22:01
207.19.142.222



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 Re: John Deere 4020 seat in reply to Mark B, 03-10-2002 07:35:00  
The owners manual says : The tension of the steel compression spring can be adjusted to conform to your weight.This enables the seat to"float"when you are traveling over rough ground.To make the adjustment,turn the weight-adjusting screw clockwise or counterclockwise until the indicator in the lefthand side of the seat conforms to your weight.
If this doesn't work you may have to replace the spring if it's tired or broken or other internal parts.

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Steven M

03-10-2002 08:21:37
209.240.222.131



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 Re: John Deere 4020 seat in reply to Mark B, 03-10-2002 07:35:00  

At the front,and bottom of the seat,there is a weight adjusting screw. On the left side of the seat,there is a weight indicator. If i remember right,you have to move the seat to the upper or rear position,to turn the weight adjusting screw. If this don't help,you may need a new shock absorber assembly.



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Mike

03-10-2002 09:40:51
216.255.35.133



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 Re: Re: John Deere 4020 seat in reply to Steven M, 03-10-2002 08:21:37  
A 4020 doesn't have a shock absorber assembly.
It is a sping assemby that is controlled by the
tension on the spring.If it hasn't been used in
a while it could be froze up,or the coil spring
could be broke.If you take the 4 bolts out that
hold the seat on you'll find your problem.A 1969
4020 has a side console,a 1968 does not.



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Steven M

03-10-2002 10:30:32
209.240.222.131



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 Re: Re: Re: John Deere 4020 seat in reply to Mike, 03-10-2002 09:40:51  

You better take a good look at a parts book,like i am right now.
The Deluxe seat support. (HAS) a Shock Absorber Part no. AR 71976 Also two springs, Part No. R 26877 The springs go on the Shock Absorber,one on each end.



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mike

03-10-2002 11:54:28
209.143.42.128



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 Re: Re: Re: Re: John Deere 4020 seat in reply to Steven M, 03-10-2002 10:30:32  
The deluxe seat is not what's standard.You can't
go buy parts books,lot of mistakes,and changes
were made during production.I can show you parts
with the same exact number that don't interchange.



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Tim(nj)

03-10-2002 18:49:33
204.186.33.200



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 Re: Re: Re: Re: Re: John Deere 4020 seat in reply to mike, 03-10-2002 11:54:28  
I've seen about 50 different 4020s in my area over the years, and I can't recall ever seeing anything other than the deluxe seat on one.



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boB

03-13-2002 21:47:59
63.175.126.61



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 Re: Re: Re: Re: Re: Re: John Deere 4020 seat in reply to Tim(nj), 03-10-2002 18:49:33  
Been working on JD tractors for thirty years.I think I looked under the seat once.Parts books dont lie.If you have one of them cheap seats I want it.Your seat does have a shock on it,its most likely only a small part of the problem. There is two adjustments on it,one is for weight,if your weight is to much for what it is adjusted for, your seat will hit bottom.The shock just like on a car keeps it from moving either direction,slows it down..round that shock just like on your car is a good sized spring,which holds your car up,in your case it would holds your seat up If you put to much weight in your car it will hit bottom too.Look under the front of your seat under the latch .Blow the dust, corn and hayfields out of ther.Get every thing that fell out of the tool box and every thing that was put along side the seat out of there and take a look.Your adjusting bolt will be rusty,thats the bolt that comes out the front of your seat under the latch.This bolt has a lot of threads on it and will need to be replaced if you cant turn it.When turned in the right direction it puts pressure on the coil spring.These seats in their day were King of the fields. Your should fix it right so when you turn the key you get the ride of your life.FOR more info contact rbbbjb@yahoo.com

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tony uresti

04-05-2004 13:51:33
170.76.57.34



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 Re: Re: Re: Re: Re: Re: Re: John Deere 4020 seat in reply to boB, 03-13-2002 21:47:59  
Tim how do you adjust the height of the 4020 seat?



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Kraig WY

03-10-2002 08:06:22
63.229.153.116



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 Re: John Deere 4020 seat in reply to Mark B, 03-10-2002 07:35:00  
I'd like to find that out my self, I darn near get bucked off plowing snow over cattle guards.



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