Adjustting 1020 john dreere carburetor - John Deere Tractor 1020, 1520, 1530, ITJD37

Try contacting John Deere. https://www.johndeeretechinfo.com/index.cfm/type/WIRING-DIAGRAMS/

Here's the link and I'm sure you will get the solution of your problem.
John Deere 1020 1120 and 1630 Tractors Service Manual

Repair your vehicle right away. Just click on the link I attach.
John Deere 1020 1120 and 1630 Tractors Service Manual

adjust your linkage rods

.030 in and ex.

On most float-type carburetors, the float is usually perpendicular to the edge of the carburetor body when the needle is seated.Turn the carb upside down and adjust the float if necessary, to where the float is parallel to the carburetor bowl mounting surface. There are tangs at the front of the float where it hangs on the pin that can be bent up or down to accomplish this.

needle and seat in carb probably shot thanks to the alchol in fuel.carb kit for under 20. should fix it,also install a fuel shut off in the fuel line to avoid engine flooding when not in use..

I need the firing order for a John Deere 1020 tractor

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
John Deere 1020 1120 and 1630 Tractors Service Manual

open hood to get to top steering gear check for lube and check adjuster worm gear known to crack or break a gear tooth than check thru view plate opposite of the steering cylinder which is connected to the rack&pinion make sure timing marks line up may have skipped a tooth or the thrust pad(shims) have shifted