The 4000 Ford tractor is an old tractor model no longer in production. So, if you like your 4000 tractor, you'll have to put in the effort to keep it running. Maintaining an old model Ford can be accomplished with regular tuneups of some of the most essential components.
To ensure that a 4000 Ford tractor runs well, you must keep the fuel system clean, so this is a good place to start your Ford tractor tuneup. Replace any rusted or corroded metal components with new steel components that match the originals. These are standard pieces, like tubing and screws, that can be found at any hardware store. You should also clean all filters in the fuel line.
A properly running Ford tractor also requires a clean, working air system. To clean the air system, you must clean the actual filter itself, as well as the chamber in which the filter installs. To do this, you must remove the filter from the chamber and spray the filter with a hard stream of water, using a wire brush to remove stuck-on dirt if necessary. While the filter chamber is empty, use a cleaning brush with a long handle to pull out any debris in the chamber before putting the filter back in place.
As long as the Ford tractor is starting and running well, you won't need to do much work tuning up the ignition. If you want to start using a tractor that hasn't been in use for several years, though, you should begin by checking all of the wires that connect to the ignition system. You should also look for any burned out components and replace them if you find them. Generally speaking, spark plugs should be changed automatically before running an old Ford tractor.
Before even attempting to use a 4000 Ford tractor, give the unit a good cleaning. Wipe down the exterior and any working component that is exposed. If the unit has been sitting for a long time, clean the bottom of the tractor, and the interior around the engine and other working systems to remove standing dust. During this cleaning, check all wiring and metal. Replace corroded or worn parts as you find them to ensure years of continued use.