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John Deere 4020 - Featured Tractor

The John Deere 4020 model tractor was produced in 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971 and 1972 in Waterloo, Iowa and Mexico. It has a 404 ci engine rated at 101 horsepower.

Our Most Popular JD 4020 Parts

(Click here to see all parts available)

John Deere 4020 Clutch

4020 Clutch Adjusting Tool
Clutch Adjusting Tool - For tractor models 3010, 3020, 4000, 4010, 4020, 4320, 4520, 4620, 7020.[...] 830602 ... $72.32

John Deere 4020 Cooling System

4020 Radiator Cap
Radiator Cap - For tractor models 2010, 2510, 2520, 3010, 3020, 4000, 4010, 4020, 4030, 4320, 4430, 4520, 4620, 463[...] R27209 ... $20.78
Water Pump - For tractor models 3010, 3020, 4000, 4010, 4020 All Diesel without AC. Replaces casting numbers R263[...] AR45332 ... $110.33

John Deere 4020 Decals and Emblems

4020 Decal Set
Decal Set - COMPLETE Decal Set for John Deere Model 4020. Does not include Syncro-Range or Powershift decals, Se[...] R2610 ... $29.25
4020 Hood Ornament
Hood Ornament - For tractor models 1010, 2010, 2510, 2520, 3010, 3020, 4000, 4010, 4020, 4320, 4520, 4620, 5010, 502[...] AR28047 ... $31.45
4020 Side Hood Emblems, OEM Set
Side Hood Emblems, OEM Set - 37" in length with 5 mounting studs. Mounting is speed nut type, no threads. For 1010, 2010, 2510, 2[...] R2533 ... $138.69
4020 Syncro-Range and Power Shift Decal Set
Syncro-Range and Power Shift Decal Set - This Mylar set covers those decals that are different than the normally used set when used for the S[...] AR52393 ... $45.07

John Deere 4020 Electrical System

4020 12 Volt Conversion Kit
12 Volt Conversion Kit - Converts 24 Volt systems to 12 Volts on gas and diesel models 3010, 3020, 4010, 4020. Kit includes: [...] TS-8000 ... $380.88
4020 Alternator
Alternator - 12 volt, 72 amp. For tractor models (5200 1974-77 with 404 dsl), (5400 1974-77 with 531 dsl), 5420, [...] ADR0133 ... $64.79
4020 Electronic Ignition Conversion Kit, 12 volt negative ground
Electronic Ignition Conversion Kit, 12 volt negative ground - For Tractor Models 4010, 4020 with 302, 340 eng., 4020 with 362 eng using Delco distributor # 111262[...] 1163A ... $81.45
4020 Electronic Ignition Conversion Kit, 12 volt positive ground
Electronic Ignition Conversion Kit, 12 volt positive ground - Use on the following tractors: 4010 and 4020 with 6-cylinder engine sizes 302, 340, 362 using Delco [...] 1163AP12 ... $90.78
4020 Ignition Switch with 2 Keys
Ignition Switch with 2 Keys - 6 Terminal. For tractor models 2510, (5010 SN# 008000 and up), (3020 SN# 68000 to 122999), (4020 SN#[...] AR39505 ... $24.75
4020 Key Switch, 6 Terminal
Key Switch, 6 Terminal - With key. For tractor models (1010 gas or LP up to SN# 51039), (2010 gas/LP up to SN# 055380), (3010[...] AR26528 ... $38.40
4020 Key Switch, 6 Terminal
Key Switch, 6 Terminal - With keys. For tractor models (3010 diesel), (3020 diesel up to SN# 67999), (4010 diesel), (4020 die[...] AR26557 ... $43.13
4020 Light Switch, 12 Volt
Light Switch, 12 Volt - 4 position, 5 terminals and fuse, .50" thread dia. For tractor models 1010, 1020, 1520, 2010, 2020, [...] AR28401 ... $34.13

John Deere 4020 Fuel System / Air Intake

4020 Carburetor Kit, Basic
Carburetor Kit, Basic - Kit for Zenith 12510, 13429, 12879, 13320, 13450, 13430 carbs on 3010, 3020, 4020. John Deere Carb: [...] Z106 ... $26.25
4020 Carburetor, Rebuilt
Carburetor, Rebuilt - Fits 3010, 3020, 4010, 4020 - replacement for OEM USX20, USX21, USX30, USX31, USX35, USX36, USX48. A[...] 1532-CARB ... $265.60
4020 Carburetor, Rebuilt
Carburetor, Rebuilt - Fits 3010, 3020, 4010, 4020 - replacement for OEM 12510, 12879, 13320, 13429, 13430. Add $200.00 cor[...] 1534-CARB ... $265.60
4020 Fuel Injector
Fuel Injector - For tractor models JD 3010, 3020, 4010, 4020 model tractors with injector #20494. Replaces AR39811, [...] AR50781 ... $35.43
4020 Fuel Injector
Fuel Injector - Nozzle, Injector. Pencil-type injector For tractor models 840, 940, 1020, 1030, 1040, 1129, 1139, 11[...] AR89564 ... $33.75
4020 Fuel Pump
Fuel Pump - Fuel transfer pump, similar to original equipment manufacturer, cannot be repaired. Diesel tractors:[...] TP-RE42211A ... $62.44
4020 Fuel Pump
Fuel Pump - This fuel pump is for diesel tractors: 830, 930, 1020, 1520, 2020, 2030, 2040, 2240, 2440, 2510, 252[...] TP-RE42211B ... $28.02
Grommet, Fuel Filler, Black - For tractor models 70, 620, 630, 720, 730, 1020, 1520, 2020, 3010, 3020, 4010, 4020, 5010. Measures [...] A5157R ... $19.95
Grommet, Fuel Filler, Red - For tractor models 820 (3 cyl.), 1010, 1020, 1520, 1530, 2010, 2020, 2030, 2040, 2240, 2440, 2510, 2[...] R39613R ... $18.75
4020 Precleaner Cover, Metal
Precleaner Cover, Metal - 7" diameter with brass nut, fits Donaldson pre-cleaners. For tractor models Some 60, 70, 520, 530, 6[...] AF3583R ... $26.48

John Deere 4020 Gauges

4020 Tachometer Cable
Tachometer Cable - 33" long. For tractor models 3010, 3020, 4010, 4020, 4320, 4520, 4620.[...] AR26721 ... $16.13
4020 Transmission Oil Temperature Gauge
Transmission Oil Temperature Gauge - For tractor models (3020 SN# 123000 and up), (4020 SN# 201000 and up), 4320, 4520, 4620.[...] AR46979 ... $43.90

John Deere 4020 Hitch / Drawbar

Cat II Top Link - Category 2 Quick Release Top Link with Knuckle. Extends from 25 inches to 33.5 inches. Barrel length[...] AR34208 ... $199.81

John Deere 4020 Lights

4020 Dash Light - 12 Volt
Dash Light - 12 Volt - For tractor models 50 up to SN# 5016122, 60 to SN# 6017060, 70 Highcrop to SN# 706327, 520 to SN# 52[...] AD2835R-12V ... $18.71
Light Switch, 4 position - 6 terminal, uses knob R46092. For tractor models (2350 with sound guard cab), (2520 from SN# 22001 a[...] AR48724 ... $24.05
4020 Work Tail Light
Work Tail Light - 2 wire connectors. 6 Volt. For tractor models 50, 60, 70, 80, 520, 530, 620, 720, 730, 820, 930, 102[...] AR77326 ... $51.67

John Deere 4020 Seats

4020 Seat Cushion Set
Seat Cushion Set - Yellow Leatherette upholstery seat cushion set. Includes seat, lower and upper backrests. For tracto[...] JD5678 ... $119.04

John Deere 4020 Sheet Metal / Body Parts

4020 Battery Box, LH
Battery Box, LH - For tractor models 2520, (3020 serial number 123000 and up), (4000 Row crop serial number 201000 and[...] AR40674 ... $80.37
4020 Battery Box, RH
Battery Box, RH - For tractor models 2520, (3020 serial number 123000 and up), (4000 Row crop serial number 201000 and[...] AR40673 ... $80.37
Side Screen - Side grill panel, 17 x 19-3/4. For tractors: 4000, 4010, 4020. Two(2) used per tractor. Sold individ[...] AR32720 ... $78.75

John Deere 4020 Steering

4020 Steering Wheel
Steering Wheel - Steering wheel, 16 1/2 diameter, 7/8" splined hub, smooth finish. Tractors: 820 Germany, 830 Germany[...] T22875 ... $37.50
Steering Wheel - 16" diameter, 7/8" splined hub, smooth finish, like original. For tractor models 1010, 2010, 2510, 3[...] AR26625 ... $43.68
Steering Wheel Cap - This 2 legged deer, correct cap for many covered steering wheels on JD models from 1968-2000. Fits a[...] AL155227 ... $32.76
Steering Wheel Cap, Black Face - For tractor models: 1020, (820 3-cyl), 1520, 2020, 2510, 2520, 3020, 4000, 4020, 4320, 4520, 4620, 5[...] R26673 ... $64.17

John Deere 4020 Wheels

4020 Front Wheel Bearing Kit
Front Wheel Bearing Kit - Wheel bearing kit. For 1020, 1520, 2030, 2440, 2510, 2520, 2630, 2640, 3010, 3020, 4000, 4010, 4020,[...] FW157S ... $44.86

Click here to see our full catalog of John Deere 4020 Parts



Recent Topics

  • Keep generator or replace it on 4020? - I've been busy tinkering with my '68 4020 Propane and for the most part got it running very well. This tractor still has it's original generator installed. There are five head lights. The four original type on the fender lips and one in the rear shining on the implement. At 1,000 RPM Plus, with the lights on, the voltage meter ( brand new) drops to 12 volts. with the lights off the voltage is just over 13.7 VDC. The lights do not go bright/dim as engine speed changes. Is the voltage dro ...
  • Console 4020 SCV question - My new to me 4020 has a 158 loader with factory 3 spool valve on back of right side loader frame. Loader valve is fed from #2 SCV. I know, not ideal, but has likely been this way for over 30 years. Tractor has factory #3 SCV also. The issue is that the loader will barely move when the flow control on #2 is set more than about 1/2 way open. Have to dial it back to about 1/4 open to get movement. I haven't tried it yet in the other SCV's. Why is flow restricted in #2 when over 1/2 open? Thank you ...
  • 4020 Propane spark plug threda leaking. - I had a dickens of a time starting my '68 4020 Propane today. Lots of fuel and a hot spark. I did get it to run and plowed my road of snow with out an issue. Since it was so hard to start,I thought I'd check the timing and it was right on for propane. As I was turning the engine over with a remote starter and the coil wire off, I heard air escaping. I mixed up some soapy water and sprayed the spark plug seats and sure enough 5 of 6 plugs were leaking! I remov ...
  • 4020 24v regulator rubber mounting brackets - Took the regulator off to clean and the rubber mounting bracket on the left side has both ears broken off. The one on the right is ok. The prior owner used a zip tie to hold the regulator on. JDPARTS says the part is NLA. Can these be purchased new somewhere or should i go to the salvage yard? Has anyone fabricated a replacement? What did you use?
  • 4020 Engine transplant - bad? - A few posts below this one references a possible late model 4020 that has a combine engine in it. My questions- #1- Lets assume you are in the market for a 1969-72 4020. You are planning to keep for awhile and want to use for all around farm work and not haul around to shows and parades. Is a 69-72 4020 with a combine engine in it a "bad" thing? Will the tractor perform differently than a stock 4020? As far as resale, what might be the discount between 2 identical 4020's with one having a c ...


  • Recent Ads


    NEW FRONT KNEES FOR JOHN DERRE HIGH CROPS 2510 thru 4020 these are better than deere made ....... made by firm in iowa we dont have many left Condition: new, Price: 1000pr, Posted 2018-11-14 by DICK, in bethel MN.

    NEW FRONT KNEES FOR JOHN DERRE HIGH CROPS 2510 thru 4020 these are better than deere made ....... made by firm in iowa we dont have many left Condition: new, Price: 1000pr, Posted 2018-11-14 by DICK, in bethel MN.

    Wanted: Wanted to buy mounting brackets to put a hiniker 1300 cab on a 4020 Posted 2018-11-20 by dave raymond, in belmont WI.

    Swartz wide for 3020 or 4020 John Deere has 8 bolt front hubs, very good condition,450 obo also have a belly mount John Deere sickle bar mower for the same tractor good condition no longer need it hate to scrap it 300obo best to call can get pictures on request Condition: good, Price: varies, Posted 2018-12-02 by Wayne, in Gilman IL.

    Important: Yesterday's Tractor Co. takes no responsibility for the accuracy, validity or availability of the items listed here nor do they receive any profit from the 3rd party transactions that may transpire from the use of this website. Yesterday's Tractor Co. does not sell tractors, nor do we collect money or broker transactions for others.


    Archived Ads for John Deere 4020 Tractors
    (Information only, no longer for sale)


    John Deere 4020 HI CROP, syncro, ROPS, 7100 hrs, restored in 2008, excellent cond, Condition: Excellent , Price: 27500.00, Posted 2018-06-25 in Apex NC.

    JOHN DEERE 4020 high crop 1971 syncro new rice tires 3pt fenders expo restoration drawbar new lites etc you probably cant find one nicer Condition: expo or better, Price: 35000bo, Posted 2018-07-05 in bethel MN.

    Looking for a couple nice fan shrouds for a John Deere 4020 Price: 1, Posted 2018-07-13 in Palmyra IL.

    John Deere 4020 Condition: Good, Price: 12,500, Posted 2018-07-14 in Norris City IL.

    John Deere 4020 for sale. 1970 model diesel. Three point, Synchro range transmission. I can help get it to you. Condition: Runs good. , Price: 8000, Posted 2018-07-14 in Alva OK.

    Important: Yesterday's Tractor Co. takes no responsibility for the accuracy, validity or availability of the items listed here nor do they receive any profit from the 3rd party transactions that may transpire from the use of this website. Yesterday's Tractor Co. does not sell tractors, nor do we collect money or broker transactions for others.




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