Where can I download a workshop manual for a John Deere 1070 tractor

Edited text with a wild guess at the maker. Make model (what it is) in all questions please.
Category moved to John Deere Tractor.

If it was working before, there is no need to worry about the firing order as that never changes. Things to look at;
Clean and correctly gapped spark plugs,
Clean gas,
Fuel filter?
and a clean carburetor, float bowl and jets.

John Deere 3020 Engine Engine Detail John Deere Firing order: Starter volts: Oil capacity: 9 qts 8.5 L 13 more rows •
Jul. 10, 2020

TractorData.com John Deere 3020 tractor engine information

John Deere 3020 Tractor Service Manual - Jensales

https://www.jensales.com > products > John-Deere-302...

This John Deere model 3020 Gas and Diesel Tractor Service Manual is a digitally enhanced reproduction of the original manufacturer-issued Shop Manual.
US$120.98 · ‎In stock

operators manual for john deere 3020 tractor owners ... - eBay

https://www.ebay.com > itm

3020 Tractor Operators Manual. This operators manual includes Gas, Diesel, Lp. This comprehensive manual includes. Fully Covers Serial No.
US$15.97 · ‎In stock

JOHN DEERE 3020 Gas and Diesel Tractor Service Manual

https://www.ebay.com > itm > JOHN-DEERE-3020-Gas...

This is a new reprint of John Deere Service Manual SM2041 for the John Deere 3000 Series Tractors shown above. It is dated June 1961. Includes 3010 & 3020.

Does this help?
https://www.green-parts-direct.com/john-deere-parts-diagrams/john-deere-1070-tractor-synchronized-transmission-pc2228-drive-shaft-870-mfwd-power-train/AD-4275-168584-57146

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.
Best Manuals

Use a nut splitter to break the nut in half.

Check your clamp near carb

wiring diagram for john deere 1070 tractor Google Search

John Deere 3 Post Hole Digger PTO Drive Service Manual Download John Deere...

If the injector pump is driven from inside the crank case the pump could be the cause of fuel in oil. I saw this problem happen on a Ford

should be a nut or spring right behind clutch or in the column

There is an interlock that prevents starting the tractor when in gear and another interlock which prevents the tractor from running when you get off of the seat and the tractor is in gear. Check these interlocks.