Valmet 6400 service schedule

1. Wipe each nipple before greasing and pump until clean grease comes out. Grease with the joints unloaded.
2. Three-point linkage and towing hook.
3. Brake mechanism (EP grease).
4. Front axle brackets, plus the steering nipples and the non-powered front axle if fitted.
5. While there: check the transmission oil level, fan belt tension, water trap and battery electrolyte, and clean the air filter cyclone on tractors with a horizontal filter.

Tools: Grease gun, Rags

1. Run the engine up to working temperature, park on level ground, lower implements, apply the parking brake and stop the engine.
2. Remove the sump plug and drain the oil. It will be hot; wear gloves.
3. Clean around the filter, unscrew it and throw it away. Look at the old oil and filter: a lot of dirt can point to a fault.
4. Smear clean oil on the new filter's seal and screw it on by hand.
5. Refit the sump plug and fill with ≈13 L of oil.
6. Start the engine, check for leaks, stop it, wait a few minutes and check the dipstick.

Tools: Drain tray (15 L), Spanner for the sump plug, Filter wrench, Funnel, Rags, Gloves

1. Stop the engine and open the air filter housing.
2. Take out the main element. Leave the inner safety element in place.
3. Blow the main element out from the inside outwards with low-pressure air. Do not knock it against anything.
4. Hold a torch inside it and look for holes or split seals. Fit a new element if it is damaged.
5. Wipe out the housing and refit the element and cover.

Tools: Compressed air with a low-pressure nozzle, Clean rags, Torch

1. Remove the cab air filter cover.
2. Blow the filter out gently against the normal air flow; do not damage the paper.
3. At the 1,000-hour or yearly service, fit a new filter instead and wash the recirculation filter.
4. Refit the cover.

Tools: Compressed air with low-pressure nozzle, Screwdriver

1. Grease the powered front axle joints.
2. Grease the door and window hinges and locks.
3. Check the brake fluid level (and the clutch fluid level from serial 668103).
4. Check the wheel nuts and bolts and the tyre pressures.

Tools: Grease gun, Torque wrench, Tyre gauge

1. Lower implements, stop the engine and apply the parking brake.
2. Clean around the filter(s) so no dirt gets in.
3. Unscrew the filter(s) and catch the oil.
4. Oil the new filter seals and fit them by hand.
5. Start the engine, check for leaks and top up the transmission to the dipstick mark.

Tools: Filter wrench, Drain tray, Rags

1. Stop the engine. Keep naked flames away.
2. Close the fuel tap if fitted, then remove the water trap bowl.
3. Empty out water and dirt and clean the bowl and gauze.
4. Refit the bowl with a good seal, open the tap and bleed the fuel system if needed.

Tools: Container, Spanner, Rags

1. Stop the engine and apply the parking brake.
2. Measure the free travel at each brake pedal and the clutch pedal.
3. Compare with the figures in your handbook (not given in the pages found) and adjust if needed.
4. With the pedals latched together, check both brakes pull evenly on a road test.

Tools: Rule, Spanners

1. Stop the engine and open the air filter housing.
2. Take out the main element, then the inner safety element.
3. Wipe the housing clean, taking care no dirt gets into the intake.
4. Fit the new safety element, refit the main element and close the housing.

Tools: Clean rags

1. Work the tractor so the oil is warm, then park level, lower the linkage and stop the engine.
2. Drain the transmission and hydraulic oil from the drain plugs.
3. Take out the suction strainer, wash it in clean solvent, dry it and refit it with a good seal.
4. Change the pressure filter(s).
5. Refit the drain plugs and fill to the dipstick mark with the right oil.
6. Run the engine, work the linkage and spool valves, then recheck the level with the arms lowered.

Tools: Large drain tray (60 L), Spanners, Filter wrench, Parts cleaner, Pump or funnel

1. Stop the engine and keep naked flames away.
2. Clean around the filters, then remove them and catch the fuel.
3. Fit new filters with new seals.
4. Bleed the fuel system with the hand primer until fuel comes out free of bubbles, then start the engine and check for leaks.

Tools: Filter wrench, Container, Rags

1. Park level and stop the engine.
2. Drain the differential housing.
3. Turn each front wheel so the hub plug is at the bottom, and drain the hub.
4. Refit the drain plugs, fill the differential to its level plug, then turn each hub plug to the level position and fill to the level hole.
5. Refit all plugs and check for leaks after a short drive.

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

1. On by-pass turbo (DW) engines, detach the front end of the turbo by-pass adjusting rod first. Do not detach the rear end from the membrane box.
2. Remove the valve cover.
3. Turn the engine until the piston of the cylinder to be set is at top dead centre on its compression stroke.
4. Slacken the locknut, set the clearance to 0.35 mm on both valves and tighten the locknut.
5. Do each cylinder in turn in the injection order, then refit the cover.

Tools: Feeler gauges, Ring spanner, Screwdriver, Bar to turn the engine

1. Grease the rear drive axle bearings.
2. Grease the flywheel ring gear.
3. On a non-powered front axle, check, grease and adjust the front wheel bearings.
4. Check and adjust the front wheel toe-in (figure: check your handbook).
5. Clean the fuel tank.
6. HiTech models: calibrate the accelerator pedal.

Tools: Grease gun, Jack and axle stands, Toe-in gauge or rule

1. Work only on a cold engine.
2. Drain the radiator and engine block.
3. Flush with clean water.
4. Refill with the antifreeze mix, run the engine to bleed air, let it cool and top up.

Tools: Drain tray, Hose, Antifreeze tester

1. Clean around the reservoir caps.
2. Bleed old fluid out at each bleed nipple while keeping the reservoir topped up with new fluid.
3. Carry on until clean fluid with no bubbles comes out.
4. Top up to the mark and test the pedals.

Tools: Bleed tube and jar, Spanner, Helper

1. Change the transmission housing breather.
2. Have the injectors checked and cleaned.
3. Check the alternator and the starter motor.

Tools: Spanners, Injector tester (workshop)