Other options included dual rear wheels and an enclosed cab with heat and air conditioning. The canister fuel filters that were used on the 4010 were replaced for the 4020 with a screw-on type of fuel filter. They also were equipped with an auxiliary fuel filter on the right side. By 1969, Deere decided that the 4020 could use a bit of a revamping. The remaining digits represented the numbered order of production of the unit which can be used to determine the year of production. These all steel cabs had windshield wipers and could be ordered with heat but not air conditioning. In 1969, Deere decided that the standard and row crop tractors should be considered the same, and were just equipped with different options.
We have searched worldwide for specific manufactures that meet our high standards of quality. After a year of producing the 4020, Deere spent a little more time on the engine, refining it a bit to make it easier to service. German-built cabs were available for these tractors. I would be willing to bet that if you polled a group of 4020 owners who use a number of tractors and asked them which they would give up if they had to, none of them would choose the 4020. The muffler on the tractor was replaced with an oval version. Deere also built a special version of the 4020 for Latin American customers.
This required that the generator be replaced with an alternator. These more closely matched the fenders used on row crop 4020s and the 5010. This writer can remember, when in his younger years, reaching through the steering wheel of a 4010 with his right hand to control the hydraulics when not wanting to let go of the steering wheel with his left. One version for standard tractors without a three-point hitch had the doors in the back, the other, for row crop tractors, had doors in the front. It indicates the 2000, 3000, 4000, 5000, 6000, 7000 or 8000 series type. This uncoupled the engine from the transmission and made starting easier. If you need to locate your John Deere model number and product identification number serial number , we can help! If you're looking for the engine number, that can be found directly on the engine itself.
For 1965, 4020 standard tractors began using a different type of fender that included headlights in the front. Now here is how the serial numbers apply to the 4020 specifically. A new head was developed for the tractor. The 4020 continues to be the epitome of John Deere tractors. This was handy when attempting to hook up to implements. Eight forward speeds was a small number for tractors built in this period, but Deere felt that they had chosen these speeds very carefully to match all jobs that a farmer would do.
The clutch was no longer necessary to shift the tractor at all. Finally, and probably most importantly, the electrical system in the console 4020 was changed from 24 volt positive ground to 12 volt negative ground. In some cases the original parts are of higher quality, in others the new version of the part is the way to go, and of course there are some that are identical. Each bid during the extension period extends the auction by 5 minutes. Eventually, though, Deere decided it better to not give customers the choice of whether or not they wanted to be protected in the case of a roll over, and the Stolper cabs were dropped. The third number indicated the Fuel Type Production Code.
However most buyers opted for the popular 4020 and only 7,987 of the 4000 tractors were built. Now capable of producing over 90 horsepower the 4020 diesel continued to stand ahead of its competition. The tractor was nearly identical to the North American row crop version of the tractor, but they sported additional lights and clamshell fenders. This additional power did come at a cost, though, as the 4020 lost. Lets start with the system prior to 1965.
Light torque mode was intended to increase steering control while pulling, particularly on sloped ground. The 4020 is significant for its great popularity; over 184,000 units were built. Some of these improvements included moving the hydraulic levers from the left side of the dash to a console to the right of the operator, a narrower oval muffler for improved visibility, and a longer, bent, gear shift lever. Tractors built by the other companies were gaining features and power, and Deere simply wanted to be sure that they remained in the lead. Prior to 1965, the sequence started with two numbers then a letter.
Stolper cabs eventually replaced those made by Crenlo. The 4020 was almost identical in appearance to the 4010. Deere took a great tractor and made it better when they improved upon the 4010. Deere experimented with a system that allowed speeds to be changed on the fly. Typically this was not a problem, but it did make some work extremely difficult to accomplish. Many older 4020s and their owners would benefit from getting the tractor converted to the 12 volt system.
The instrument panel was changed to a more concave shape and the black now extended from the top of the instrument panel down and below the shift quadrant. At serial number 215000 in 1969, Deere changed the filter back to a canister type, but of a different sort than was used with the 4010. The Dubuque numbering system is different. This convenient feature could be switched on and off on the go, and offered two settings. Giving the engine an additional.