The operator's manual for a 3020 should state which weights of oil should be used in specific temperatures. Generally a 30# oil should be used in the summer and a 10# oil in the winter. A Multi-weight oil such as 15W-40 can also be used in all seasons.
The operating weight of the John Deere 3020 is around 7695 to 9585 pounds. A John Deere 3020 can be purchased from many retailers including TractorHouse.
a john deere 3020 can hole 29ish gallons for a diesel engine. go to www.tractordata.com and search john deere 3020. it will give you all sorts of info.
If it is a serious problem with the engine it is always wise to take it to a preofessional. If the problem looks to be within your skill level, you can find extra parts for the 3020 online at www.tractorpartsasap.com.
There are several online websites that sell replacement parts for the John Deere 3020. You can also check at local tractor stores for parts.
A John Deere 3020 takes 9 quarts of oil in its engine. See related link for more information...
Looks like the going rate for a Model 3020 is about $8000.
TractorHouse.com has several 1970 John Deere 3020 tractors for sale on their site. Wherever you buy, be sure to examine the tractor first, if you are depending on it being in working condiiton. On the tractor fan site chatstractors.com they are advertising a completely restored 1965 JD 3020 tractror for a reasonable price. To see the specific ad check out: http://www.chatstractors.com/1412-restored-john-deere-3020-diesel.htm.
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The John Deere 3020 was part of one of the most popular tractor lines ever produced. It came with several choices such as a diesel engine or a gas engine. It also had two types of transmissions: Syncro-range or powershift. The diesel engines had up to 65 horse power while its predicestor only had 59 horse power. It also had a more narrow turning radius of 101 inches.
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John Deere says that the tractor has a weight of 965 lbs. I found this on the their website.