Fendt 800 Vario S4 service schedule

1. Run a stationary DPF regeneration from the terminal first and let it finish. The dealer schedule says this must always be done before changing the engine oil.
2. Park on level ground, lower the linkage, loader and any implement to the ground, stop the engine, take the key out and chock the wheels.
3. Let it stand a few minutes. Hot oil burns, and the exhaust is very hot after a regeneration. Wear gloves.
4. Remove the sump drain plug and let the oil drain fully.
5. Remove the old oil filter, check the old seal came off with it, and wipe the filter head clean.
6. Oil the new filter seal and fit the filter as its instructions say.
7. Fit a new gasket to the drain plug, refit it, and fill with 10W-40 Deutz engine oil to the full mark on the dipstick.
8. Run the engine for a minute, check for leaks, stop it and recheck the level.

Tools: Drain tray (25 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 the pre-filter so dirt cannot get in.
3. Drain any water into a container, then remove the old filter.
4. Fit the new filter with a clean, oiled seal, hand-tight.
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. Stop the engine and take the key out. Wait for the AdBlue system to finish purging after shutdown before opening anything.
2. Clean around the filter cap so dirt and crystals cannot get in.
3. Remove the cap and old filter, catching any AdBlue in a container.
4. Fit the new filter and refit the cap as your handbook says.
5. Rinse spilt AdBlue off with water; it corrodes metal and electrical connectors.

Tools: Container, Gloves, Eye protection, Clean water

1. Stop the engine and take the key out.
2. Open the cab filter covers as your handbook shows.
3. Take out the old filters, wipe out the housings and fit the new ones.
4. Refit the covers. Clean the A/C condenser at the same time.

Tools: Screwdriver or Torx driver (check your handbook)

1. Wipe each nipple clean before greasing.
2. Grease every point your handbook shows, such as the front axle, steering, linkage and PTO shaft, until fresh grease shows.
3. Wipe off the surplus so it does not collect dirt.
4. Check for loose hardware, linkages and leaks while you are under there.

Tools: Grease gun, Rags

1. Stop the engine, take the key out and chock the wheels. Keep naked flames away.
2. Clean around the filter housing before opening anything.
3. Remove the old filter into a container and check the old seal came off.
4. Fit the new filter with a new seal or O-ring.
5. Prime the system as your handbook describes. Never crack open the high-pressure pipes.
6. Start the engine and check for leaks.

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

1. Stop the engine and take the key out. Never run the engine with a filter out.
2. Open the air cleaner housing and take out the element, taking care not to let dirt fall into the intake.
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.
5. Check the intake hoses and clips for leaks and clear the filter warning on the terminal if needed.

Tools: Torch, Damp cloth

1. Stop the engine and take the key out.
2. Release the tensioner and take the belts off.
3. Spin the idler and tensioner by hand: they should run smoothly and quietly.
4. Look for cracks, fraying and glazing on the belts and replace them if worn.
5. Refit the belts, check the routing and tension, and check the water pump and fan bearings for play and leaks at the weep hole.

Tools: Spanner for tensioner, Torch

1. Park on level ground, lower the linkage, loader and any implement to the ground, stop the engine, take the key out and chock the wheels.
2. Clean around the filter housing, put a tray underneath and remove the old filter.
3. Fit the new filter with a new O-ring.
4. Run the engine, check the transmission oil level and for leaks.

Tools: Filter wrench, Drain tray, Rags, Gloves

1. Park on level ground, lower the linkage, loader and any implement to the ground, stop the engine, take the key out and chock the wheels.
2. Warm the axle by driving a short way, then park level and take the key out.
3. Put a tray under the differential and remove the filler plug, then the drain plug. Let it drain fully.
4. Fit a new gasket and refit the drain plug. Fill the differential with 80W-90 gear oil to the filler plug level.
5. Do the same on each front hub, one at a time, with new gaskets.
6. Check for leaks and wipe up spills; oil on the tyres makes them slippery. Check the front axle toe-in at the same time: the schedule gives 0 to 2 mm.

Tools: Drain trays, Socket set, Torque wrench, Oil pump or syringe, Gloves

1. Stop the engine, take the key out and clean around the vent filter.
2. Unscrew the old vent filter and fit the new one.
3. Check the hydraulic oil level and for leaks.

Tools: Rags, Filter wrench

1. Stop the engine, let the air pressure down as your handbook says and chock the wheels.
2. Unscrew the old cartridge and wipe the seat clean.
3. Fit the new cartridge with a lightly oiled seal.
4. Run the compressor, check for leaks and operate the tank drain valve to drain any water.

Tools: Filter wrench or strap, Rags

1. Stop the engine and take the key out. Never run the engine with a filter out.
2. Open the air cleaner housing and take out the element, taking care not to let dirt fall into the intake.
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.
5. Check the intake hoses and clips for leaks and clear the filter warning on the terminal if needed.

Tools: Torch, Damp cloth

1. Work only on a cold engine. Never open the cap hot: coolant can spray out and scald you.
2. Park on level ground, lower the linkage, loader and any implement to the ground, stop the engine, take the key out and chock the wheels.
3. Drain the cooling system into a clean tray and fit a new drain plug gasket.
4. Refill with premixed coolant to the level in your handbook, run the engine to temperature and top up.
5. Check for leaks. Coolant is poisonous to animals: catch it all and dispose of it properly.

Tools: Drain tray (40 L), Funnel, Antifreeze tester, Gloves

1. Only check with the engine cold. Take the key out.
2. Follow the Fendt service manual to remove the cover and set each cylinder as it describes.
3. Check the clearances against your handbook figures, adjust if needed, then recheck.
4. If you do not have the service manual and tools, have your Fendt dealer do it.

Tools: Feeler gauges, Torque wrench, Service manual

1. Park on level ground, lower the linkage, loader and any implement to the ground, stop the engine, take the key out and chock the wheels.
2. Warm the transmission by driving a short way, then park level and take the key out. Hot oil burns, so wear gloves.
3. Put a large tray under the transmission and remove the drain plugs.
4. Change the suction filter and the pressure filter with new O-rings, as your handbook shows.
5. Refit the drain plugs with new gaskets and refill with the right oil.
6. Run the engine and check the oil level and for leaks. Do a rolling stop test afterwards to check there is no brake drag.

Tools: Drain tray (large), Filter wrench, Socket set, Funnel or pump, Gloves

1. Park on level ground, lower the linkage, loader and any implement to the ground, stop the engine, take the key out and chock the wheels.
2. Put a tray under the front PTO housing and remove the drain plug with its gasket.
3. Change the filter and its O-ring.
4. Fit new gaskets, refit the plug and refill with the right oil to the level mark.
5. Run the PTO briefly with nothing connected, stop and recheck the level.

Tools: Drain tray, Socket set, Filter wrench, Gloves

1. Park on level ground, lower the linkage, loader and any implement to the ground, stop the engine, take the key out and chock the wheels.
2. Warm the oil by running the hydraulics for a few minutes, then stop and take the key out. Hot oil burns, so wear gloves.
3. Put a large tray under the drain plug, remove the plug and let the oil drain fully.
4. Change the return line filter, the vent filter and the control pressure fine filter, with their O-rings.
5. Clean the external pressure supply sieve filter as your handbook shows.
6. Refit the drain plug with a new O-ring, refill with the right oil to the mark, run the hydraulics and recheck the level.
7. Drain the oil recovery bottles at the couplers as required.

Tools: Drain tray (large), Filter wrench, Socket set, Funnel or pump, Gloves

1. Stop the engine and take the key out.
2. Remove the old breather filter and blow the breather hose clear with compressed air.
3. Fit the new breather filter.

Tools: Compressed air, Gloves