The Ford Jubilee tractor is an N-series tractor produced as an anniversary edition in the 1953-1954 model year; a special badge on the nose of the tractor designates it as a 50th anniversary edition. A gasoline, 4-cylinder, engine powers the tractor--one of the most common farm tractors of its time. The Jubilee is a low-maintenance tractor. Routine upkeep and care has kept many N-series Fords actively used on small farms and ranches to this day. An oil change (at least once per season) is an effective way to keep the engine in tip-top condition.
Drain the oil by removing the metal plug from the oil pan. A standard crescent wrench fits the square head of the plug for removal. Drain the oil while the engine is warm--not hot--to allow all of the oil to drain from the crankcase.
Clean the drain plug threads with a small wire brush, if corrosion or hard buildup is present. Wrap the threads with heat-resistant Teflon tape before reinstalling--doing so will help seal the plug into the 50-year-old oil pan.
Remove all dirt and buildup, if present around the crankcase breather/fill cap. The breather location is located just in front of the distributor cap, on the right side of the engine. Wipe this breather and surrounding area down with a rag dampened with diesel gasoline. The diesel gasoline will break up the baked-on sludge and accumulation of dirt.
Grasp the crankcase breather with one hand and twist it back and forth while pulling upward. Do not remove the wing nut on top of the breather--doing so will cause the breather to come apart. With the breather/fill cap out of the way, a 1-inch fill hole is accessible.
Place a clean funnel into the fill hole and pour approximately five quarts of 30 weight oil into the crank case. Check the oil level on the engine oil dipstick to ensure the oil reaches the fill line.
Reinstall the breather/fill cap by pressing it into the hole until it bottoms out. The fill cap should be snug after installation.