John Deere 6120M service schedule

1. Warm the engine, park on level ground, lower the linkage, loader and any implement, stop the engine, take the key out and chock the wheels.
2. Let it stand a few minutes. Hot oil burns, so wear gloves.
3. Remove the sump plug and let the oil drain fully.
4. Remove the filter, check the old seal came off, and wipe the filter head clean.
5. Oil the new filter seal and fit it hand-tight as marked on the filter.
6. Refit the plug and fill with Plus-50 II to the full mark.
7. Run the engine for a minute, check for leaks, stop it and recheck the level.

Tools: Drain tray (20 L), Filter wrench, Spanner for sump plug, Funnel, Rags, Gloves

1. Stop the engine, take the key out and chock the wheels. Keep naked flames away.
2. Clean around both filters before opening anything.
3. Drain any water from the primary filter bowl into a container.
4. Remove the old filters and fit the new ones with clean seals.
5. Prime the system as your handbook describes. Never crack open the high-pressure pipes on a common-rail engine.
6. Start the engine and check for leaks.

Tools: Container for fuel, Filter wrench, Rags, Gloves

1. Park on level ground, lower the linkage, loader and implements fully, stop the engine, take the key out and chock the wheels.
2. With the engine off, work the spool and linkage controls to relieve hydraulic pressure.
3. Let hot oil cool before starting; it burns.
4. Clean around each filter, remove it and catch the oil.
5. Fit the new filters with oiled seals.
6. Run the engine briefly, stop, check for leaks and top up with Hy-Gard.

Tools: Drain tray, Filter wrench, Rags, Gloves

1. Stop the engine, take the key out, lower the front linkage and chock the wheels.
2. Clean around the filter cover and remove it, catching the oil.
3. Fit the new element with its seals and refit the cover.
4. Run the PTO briefly, stop, check for leaks and check the oil level.

Tools: Drain tray, Spanners, Rags, Gloves

1. Stop the engine and take the key out. Never run the engine with the filter out.
2. Open the housing and take out the primary element. Leave the secondary element in place.
3. Wipe the housing out with a damp cloth. Do not blow dirt down the intake.
4. Fit the new element, check it seats evenly and close the housing.

Tools: Torch, Damp cloth

1. Stop the engine and take the key out.
2. Open the filter covers inside the cab and remove the elements.
3. Fit the new filters the right way round and refit the covers.

Tools: Screwdriver, Dust mask

1. Stop the engine and take the key out.
2. Open the outside filter covers and remove the elements, wearing a dust mask.
3. Fit new filters and check the covers seal.

Tools: Screwdriver, Dust mask

1. Stop the engine, take the key out and let the engine cool.
2. Clean around the filter housing, remove the cover and take out the old element.
3. Fit the new element with its seal and refit the cover.
4. Run the engine and check for oil leaks around the housing.

Tools: Spanners or screwdriver, Rags

1. Stop the engine and take the key out.
2. Remove the primary element, then the secondary element, without letting dirt fall into the intake.
3. Fit the new secondary element straight away, then refit or renew the primary.
4. Close the housing and check the clips.

Tools: Torch, Damp cloth

1. Stop the engine, take the key out and let the exhaust and dosing system cool.
2. Clean around the pump filter cap so no dirt gets in. AdBlue crystallises and is corrosive, so wear gloves.
3. Remove the old filters and fit the new ones as your handbook shows.
4. Rinse any spilt AdBlue off with water.
5. Top up the tank with clean AdBlue only and check the display for warnings after starting.

Tools: Filter cap tool (check your handbook), Rags, Gloves, Container

1. Park on level ground, lower the linkage, loader and implements fully, stop the engine, take the key out and chock the wheels.
2. With the engine off, work the spool and linkage controls to relieve hydraulic pressure.
3. Let hot oil cool for a while, then drain it from the drain plugs.
4. Refit the plugs and fit both new filters.
5. Fill with Hy-Gard, run the engine, work the hydraulics through their full travel, lower everything and recheck the level.

Tools: Large drain tray (80 L), Spanners, Filter wrench, Pump or funnel, Gloves

1. Let regenerations finish when the display asks; do not switch off mid-regeneration unless you have to.
2. Book DPF cleaning or replacement with a John Deere dealer.
3. Never work near the exhaust until it has cooled; it runs very hot, especially after a regeneration.

Tools: Dealer service tool

1. Park on level ground, lower implements, stop the engine, take the key out and chock the wheels.
2. Turn the wheels so each final-drive plug is in the drain position your handbook shows.
3. Drain the housing and both final drives.
4. Refit the drain plugs and fill each to its level plug with Hy-Gard.

Tools: Drain tray, Spanners, Oil pump or squeeze bottle

1. Only work on a cold engine. Open the cap slowly to let pressure out.
2. Drain the radiator and block into a tray. Dispose of old coolant properly.
3. Refit the plugs and fill with Cool-Gard II.
4. Run the engine to working temperature with the heater on, let it cool and top up.

Tools: Drain tray, Hose, Coolant test strips