Kubota L3301 / L3901 service schedule

1. 2WD: grease the knuckle shafts (left and right), pedal shaft, top link and right lifting rod fitting.
2. 4WD: grease the pedal shaft, top link, lifting rod and tie-rod ends. For the front axle support, take out the breather plug, pump grease in until it overflows the port, then refit the plug.
3. Every 400 hours on 2WD also grease the front wheel hub: remove the hub cover and pack bearing grease.

Tools: Grease gun

1. Levers in neutral, parking brake on, engine stopped, and keep people clear.
2. Sit down, select forward or reverse (or push the speed pedal on HST), press the clutch fully and disengage the PTO. Turn the key to START: the engine must not crank.
3. Engage the PTO with the clutch pressed and the shuttle or speed pedal in neutral. The engine must not crank.
4. Start the engine and stand up from the seat: the engine must stop.

1. Tighten any loose bolts to the torque in your handbook. The handbook page lists 137 N·m and 215 N·m; check your handbook for which is front and which is rear.
2. Never run the tractor with a loose wheel or rim.

Tools: Torque wrench

1. Remove the element and blow dust out from the inside while turning it. Check your handbook for the maximum air pressure.
2. Open the evacuator valve to clear dust once a week, or daily in dust.
3. Never run the engine without the element.

Tools: Compressed air (low pressure, see handbook)

1. Stop the engine, take the key out and press the belt at mid-span with 98 N: it should deflect 7–9 mm.
2. If not, loosen the alternator bolts, lever it out, retighten. Replace a damaged belt.
3. Check the fuel grommets for cracks and leaks and replace any that leak.

Tools: Spanner, Lever

1. Stop the engine and chock the wheels. Clutch free travel should be 20–30 mm: loosen the lock nut, turn the clutch rod, retighten.
2. L3901 dual clutch: after the pedal adjustment, the handbook has a second adjustment through the flywheel housing cover (bolt backed off 3/4 turn); follow your handbook.
3. Brake free travel should be 15–20 mm and equal on both sides: adjust the brake rod the same way.

Tools: Spanners, Rule, 7 mm spanner (L3901 dual clutch)

1. Read the indicator: green is good, black needs charging, white means replace (the factory battery is sealed, so do not charge it).
2. Check the terminals are tight. Disconnect negative first, reconnect positive first.

Tools: Eye protection, Rubber gloves

1. Stop the engine, let it cool and put an oil pan under the transmission oil filter.
2. Remove the filter. Do not remove the hydraulic oil filter or oil will drain out.
3. Coat the new seal with clean transmission oil. Screw on until it touches, then a further 1 turn with a filter wrench.
4. Top up to the upper notch on the dipstick, run the engine a few minutes, stop, recheck the level and look for leaks.

Tools: Oil pan, Filter wrench

1. Park on level ground with the wheels straight and the engine stopped.
2. Measure between the tyre beads at hub height, front then rear. The front should be 2–8 mm shorter.
3. If not, loosen the lock nuts, turn the turnbuckle on the tie rod and retighten.

Tools: Tape measure, Spanners

1. Park on level ground, stop the engine, take the key out and let it cool.
2. Remove the drain plug at the bottom of the engine and drain all the oil. Refit the plug.
3. Remove the old filter. Put a film of clean oil on the new filter's rubber seal.
4. Screw it on until the seal touches, then tighten by hand a further half turn only.
5. Fill to the upper notch on the dipstick (6.7 L with filter).
6. Run the engine, check for leaks, stop for a few minutes and top up to the dipstick range.

Tools: Drain tray (10 L), Filter wrench, Funnel, Shop towels, Gloves

1. Stop the engine, take the key out and let it cool a little.
2. Remove the drain plugs at the bottom of the transmission case and drain all the oil. Refit them.
3. Remove the hydraulic oil filter and wipe the metal filings off the magnetic filter with a clean rag.
4. Coat the new filter's seal with clean transmission oil. Screw it on until it touches, then a further half turn by hand.
5. Fill with Super UDT-2 to the upper notch on the dipstick.
6. Run the engine for a few minutes, stop, recheck the level and check the filter seal for leaks. Run at medium speed for a few minutes before working.

Tools: Drain tray (30 L), Filter wrench, Funnel, Clean rag

1. Close the fuel shut-off valve. Remove the old fuel filter.
2. Put a film of clean fuel on the new filter's seal, screw it on until it touches, then a further half turn by hand only.
3. Water separator: do this somewhere clean. Undo the retaining ring, remove the cup and rinse it with kerosene, rinse the element too, then reassemble.
4. Bleed the fuel system and check for leaks. Drain the separator earlier if the red float reaches the white line.

Tools: Kerosene in a clean tub, Rags, Small tray

1. Loosen the lock nut, screw the adjusting screw in until it seats, then a further 1/6 turn, and retighten the lock nut.

Tools: Spanners

1. Book it with a Kubota dealer. The clearance figure is not given: check your handbook.

1. Remove the left and right drain plugs and filling plug and drain all the oil. Refit the drain plugs.
2. Pour in 4.5 L slowly. Refit the filling plug and run the tractor a few minutes.
3. Take out the level check plug: oil should run out. If not, add more until it does. Refit the plugs.

Tools: Drain tray (6 L), Funnel

1. Remove the old element, fit the new one and refit the cover with its arrow pointing up.

1. Stop the engine, remove the cover, take out the old element and wipe oil and carbon from the case, then fit a new element and refit the cover.

1. With the engine cool, open the radiator drain plug and cap and drain all the coolant.
2. Fill with soft water and cooling system cleaner as the cleaner's instructions say, then drain.
3. Refill with 50/50 coolant to just below the cap, refit the cap and fill the recovery tank to FULL.
4. Run the engine a few minutes and top up the recovery tank when cool.

Tools: Drain tray, Gloves

1. Check all hoses and clamps are tight and undamaged.
2. Replace any worn hose. If a fuel line is removed, bleed the fuel system.

Tools: Screwdriver