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John Deere Tractors Discussion Forum
Show Parts for Model:

4020

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Author  [Modern View]
murphmeister

01-18-2013 10:17:14
8.35.120.86



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I have two, 1970 4020s. One has an air cleaner that comes out of the hood and the other doesn't. The one with tha air cleaner out is serial number 222372. IS there a reason for the difference in the air cleaners, or is something wrong???




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JDJim

01-18-2013 12:18:10
206.132.49.5



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 Re: 4020 in reply to murphmeister, 01-18-2013 10:17:14  
I have both 4000 and 4020 late models without precleaner. Both have exact same components underhood. I have seen some with the precleaner and assumed it was an option. I guess I don't have an answer. Personally I like them without, think they look cleaner and more modern.



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Tx Jim

01-18-2013 12:36:43
67.142.163.27



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 Re: 4020 in reply to JDJim, 01-18-2013 12:18:10  
Both of your tractors have a filter element(parts key #2) that older tractors didn't have. The precleaner pipe(AR78485) is the same for early & late model 4020's. Parts key #2 AR51923 CLEANER SAFETY AIR /PARTS/ ADD 130.44 USD For $130.44 I'd rather have the precleaner above the hood. In fact on my 4255 I have a Turbo ll precleaner that has a fan in it to help pull out some dust prior to air entering air cleaner.

This post was edited by Tx Jim at 12:46:42 01/18/13 2 times.

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TIMAR

01-21-2013 06:35:50
208.92.171.160



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 Re: 4020 in reply to Tx Jim, 01-18-2013 12:36:43  
The 69 and 70 models did not have the the #2 element in the parts picture. Deere added this in 71 an72 with the new block assembly



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Tx Jim

01-21-2013 09:14:35
67.142.163.27



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 Re: 4020 in reply to TIMAR, 01-21-2013 06:35:50  
Thanks for correcting my mistake. JD parts shows SN 250,000 as the start for the extra filter.



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JD Jim

01-18-2013 14:37:11
206.132.49.5



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 Re: 4020 in reply to Tx Jim, 01-18-2013 12:36:43  
Hey Tx Jim I agree down in that dusty Texas air I bet you need it. These old tractors are just toys for me now. My new ones have far superior filter systems on them though. I am amazed at the technology on the new machines. Kind of hard to keep up, changes fast.



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red.green

01-18-2013 11:14:13
76.209.53.15



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 Re: 4020 in reply to murphmeister, 01-18-2013 10:17:14  
I concur; itís my understanding that it was an option when ordering. Iíve also been told that the under hood parts are not the same. There a 4 variations of parts oil bath with and without precleaner and dry element with or without. Somebody correct me if Iím wrong, I was told this when I wanted to change my 4020 oil bath with precleaner to a dry element. A John Deere mechanic told me it was doable.

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Tx Jim

01-18-2013 11:51:11
67.142.163.27



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 Re: 4020 in reply to red.green, 01-18-2013 11:14:13  

red.green said: (quoted from post at 14:14:13 01/18/13) There a 4 variations of parts oil bath with and without precleaner and dry element with or without.


For a 4020 diesel SN<200,999 I saw two(2) air cleaner canisters listed. Dry type was introduced @ SN 119,000. The way I understand the parts catalog was the same precleaner was utilized for oil or dry air cleaner.

AR32424 oil bath

AR46151 dry type
PRE-CLEANER AND PRE-SCREENER

(OIL BATH OR DRY AIR CLEANER)

(DIESEL)


For 4020 SN >201,00 with precleaner

AR46149 AIR CLEANER 1 (A)GASOLINE

AR46150 AIR CLEANER 1 (B)LP-GAS (SUB AR46175 AND 15H21)

AR46151 AIR CLEANER 1 (C)DIESEL (SUB AR46176 AND 15H21)

SN>250001 without precleaner

AR51923
This post was edited by Tx Jim at 11:52:58 01/18/13.

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murphmeister

01-18-2013 11:41:57
8.35.120.86



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 Re: 4020 in reply to red.green, 01-18-2013 11:14:13  
Are the ones with the precleaner any more desirable?



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Tx Jim

01-18-2013 10:28:16
67.142.163.27



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 Re: 4020 in reply to murphmeister, 01-18-2013 10:17:14  
Air cleaners precleaners were an option and dealer had to specify if a precleaner was desired when ordering the tractors from the factory.



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UnstyledJDcoll.

01-18-2013 10:28:34
68.234.111.122



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 Re: 4020 in reply to murphmeister, 01-18-2013 10:17:14  
I believe the external air cleaner was just an option. I have a 72 3020 with external air cleaner but have also seen some that the intake is under the hood. Maybe someone else has a better answer.



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