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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 ... $72.78

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 ... $22.34
Water Pump - For tractor models 3010, 3020, 4000, 4010, 4020 All Diesel without AC. Replaces casting numbers R263[...] AR45332 ... $116.69

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 ... $33.75
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 ... $145.59
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 ... $45.06

John Deere 4020 Electrical System

4020 12 Volt Conversion Kit with Bosch Starter
12 Volt Conversion Kit with Bosch Starter - This 12 volt conversion kit is for a 24 volt system with a Bosch starter. Converts 24 Volt systems t[...] TS-8000 ... $772.86
4020 Alternator
Alternator - 12 volt, 72 amp. For tractor models (5200 1974-77 with 404 dsl), (5400 1974-77 with 531 dsl), 5420, [...] ADR0133 ... $82.47
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 ... $90.72
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 ... $101.11
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 ... $25.74
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 ... $41.81
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 ... $34.20

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 ... $37.37
Carburetor, Rebuilt - This rebuilt carburetor is a direct replacement for OEM numbers matching: USX20, USX21, USX30, USX31[...] 1532-CARB ... $290.50
Carburetor, Rebuilt - This rebuilt carburetor is a direct replacement for OEM numbers matching: 12510, 12879, 13320, 13429[...] 1534-CARB ... $290.50
4020 Fuel Injector
Fuel Injector - For tractor models JD 3010, 3020, 4010, 4020 model tractors. Verify stamped number before ordering: [...] AR50781 ... $35.82
4020 Fuel Injector
Fuel Injector - Nozzle, Injector. Pencil-type injector For tractor models 840, 940, 1020, 1030, 1040, 1129, 1139, 11[...] AR89564 ... $37.77
4020 Fuel Pump
Fuel Pump - Fuel transfer pump, similar to original equipment manufacturer, cannot be repaired. Diesel tractors:[...] TP-RE42211A ... $92.98
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 ... $29.15
Grommet, Fuel Filler, Black - For tractor models 70, 620, 630, 720, 730, 1020, 1520, 2020, 3010, 3020, 4010, 4020, 5010. Measures [...] A5157R ... $17.25
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 ... $26.12
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 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 ... $21.03
Light Switch, 4 position - 6 terminal, uses knob R46092. For tractor models (2350 with sound guard cab), (2520 from SN# 22001 a[...] AR48724 ... $21.11
4020 Safety Light Amber
Safety Light Amber - 12 volt amber safety light, 4-1/4 inch diameter, 3/8 inch diameter by 5/8 inch mounting stud. Does n[...] S.61357 ... $17.99
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 ... $53.74

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 ... $126.95

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, 3-1/2 dished, smooth finish. Tractors: 820 German[...] T22875 ... $37.59
Steering Wheel - 16" diameter, 7/8" splined hub, smooth finish, like original. For tractor models 1010, 2010, 2510, 3[...] AR26625 ... $43.40
Steering Wheel Cap - This 2 legged deer, correct cap for many covered steering wheels on JD models from 1968-2000. Fits a[...] AL155227 ... $42.78
Steering Wheel Cap, Black Face - For tractor models: 1020, (820 3-cyl), 1520, 2020, 2510, 2520, 3020, 4000, 4020, 4320, 4520, 4620, 5[...] R26673 ... $67.36

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



Recent Topics

  • SVcummins - 4020 hyd. issues resolved? - Hey SV! I recall reading the forum months back, perhaps even last year, that you were having trouble with your 4020(I think?) lacking pressure or flow or possibly both. I searched the forum history but ran out of patience so just wondering if you found the problem? LOL
  • 4020 starting issue - I have a '71 4020 that won't start with the switch. The starter has been rebuilt and I put on all new cables and a new solenoid. The batteries are fine. The only way it will start is if you cross the two posts on the solenoid with a screwdriver. Any ideas on how to fix this?
  • 4020 Wheel Weights - I apologize if this is a stupid question but I have tried searching for an answer and have not been able to find one. I have even spoken to local farmers in my area and could not get a clear answer. My 4020 has the rear wheels mounted all the way in / as narrow as they can be. The centers are about 1" or less away from touching the square axle housing. I am wanting to know if there is a wheel weight that can be mounted toward the inside that has a large enough hole in the center to clea ...
  • 1971 4020 hydraulic/ power steering issue - Hey yall, I have my grandfathers 1971 4020 JD. it is a side console synchro machine. when it starts up it has zero steering. Seems like a lot of resistance to move the wheel with no front wheel movement. Is this common? After about 45 seconds-1 minute it resolves itself. Also, it sounds a tad bit like a whine at start up from the rear of the machine in colder weather from the hydraulics? I checked the level of hydraulic fluid and it was really low. Looking to use this tractor this spring ...
  • 7100 Planter Row Markers hookup to 4020 - I have manuals for all this I have read but instead of seeing what happens I thought I would ask here first: I have a 4020 with 2 remotes on the rear. I have a new to me 7100 mounted planter with row makers. I've got one hose for the row markers. 4 outlets on back of tractor. I am no expert on hydraulics. I assume it just cycles these markers up and down alternating sides as it goes. How do I hook up the row marker hose on this thing? Maybe a stupid question ...


  • Recent Ads


    Gas engine for John Deere 4020. Price: 1200, Posted 2021-04-19 by Brian Pederson, in Gillett WI.

    Gas engine for John Deere 4020. Price: 1200, Posted 2021-04-19 by Brian Pederson, in Gillett WI.

    1965 John Deere 4020 powershift diesel. M&W turbo with aluminum oil pan, dual hyds, 3 pt, 15.5x38s, runs and drives good, powershift is solid, Du-Al 345 loader. 8,500 or reasonable offer Condition: good, Price: 8500, Posted 2021-04-19 by William, in Vale SD.

    Good gas engine for John Deere 4010 and 4020 tractors. Can ship on pallet. Posted 2021-04-19 by Not given, in Postville IA.

    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 powershift 1970 fenders all correct lite 3 pt drawbar rad rods exc rear rice tires double stack front wts rear wts new main hyd pump and injection pump just installed good tag photos shipping anywhere Condition: expo or better, Price: 30,000bo, Posted 2020-07-02 in bethel MN.

    SELLING duplicates from collectionJOHN DEERE HIGH CROPS 2510 thru 4020 all california tractors some restored others mechanically perfect all good metal and paint & tags shipping anywhere including canada Condition: excellent, Price: email, Posted 2020-07-02 in bethel MN.

    John Deere 4020 with high lift looser Condition: Good, Price: 9500, Posted 2020-08-11 in Medford OK.

    JOHN DEERE 4020 hi crop powershift complete 3 pt 12v conversion rad rods exc metal and paint tomato spacers on rear wheels new top end on motor powershift gone thru good tag california tractor photos available shipping help provided Condition: very nice, Price: 15000bo, Posted 2020-08-13 in bethel MN.

    Looking for a good used injection pump for a John Deere 4020, stanadyne jdb, Condition: fair, Posted 2020-08-13 in Gainesville TX.

    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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    Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate ... [Read Article]

    Latest Ad: INTERCOOLER and INJECTION LINES for IH DT414, 436 and 466 diesel engines, can ship. [More Ads]

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