Claas Disco 3450 / 3050 / 3050 C / 2650 / 2650 C service schedule

1. Park on level ground, switch off the tractor, take the key out and disconnect the PTO shaft.
2. Go over every nut and bolt on the frame, headstock, skids and covers and tighten any that have moved.
3. Check that all split pins and roll pins are in place.
4. Check the wheel nuts if the machine has transport wheels. Afterwards check them every 50 hours.

Tools: Spanner and socket set, Torque wrench

1. Switch off the tractor, take the key out and remove the PTO shaft. Wear gloves.
2. Measure each knife 10 mm in from its edge: it should be at least 36 mm wide. The drilled hole may be widened from 18 mm to 20 mm at most. Replace knives outside these limits. Never weld or straighten a knife.
3. To change knives on the Plus models, put the fitting lever between the disc and the knife holder, turn the disc until the holder sits over the dip in the skid, then push the lever down and lift the knife off.
4. Fit the new knife with its cutting edge down and the arrow on the blade pointing the way the disc turns. The holding pin must sit straight in the disc hole.
5. On the Disco 3050 and 2650 (nut-fixed knives): clean the seat, fit the knife with Loctite 243 on the screw and tighten to 120 Nm.
6. Check that each knife swings freely and can be moved easily both ways. Take the fitting lever off and refit it in its bracket on the headstock.
7. Spare knives live in the knife box on the left of the headstock.

Tools: Knife fitting lever (kept on the machine), Socket and torque wrench (120 Nm), Gloves, Eye protection

1. Replace a holder if its wear section is down from 15 mm to 12 mm, its thickness is down from 3 mm to 4 mm worn, the welds at the retaining pin are cracked, or it is bent.
2. Replace the holder if the retaining pin no longer sits straight in the disc hole, has a gap round it, or is worn down to 13 mm.
3. Replace a disc if its hole is widened, worn or damaged anywhere round its diameter.
4. When fitting discs, keep the long axis of each disc at right angles to its neighbour so the knives cannot collide.
5. Tighten the disc bolts to 80 Nm and the centre nut to 350 Nm.
6. Refit the plastic cover on each disc centre at once if it is damaged or missing, or the hub fills with crop and goes out of balance.

Tools: Vernier calliper, Spanners, Torque wrench

1. Switch off the tractor, take the key out and clean every nipple before greasing.
2. Grease the points marked for 20 hours every 20 hours, the 100 hour points every 100 hours and the 250 hour points every 250 hours.
3. On the Disco 3050 C and 2650 C, unscrew cover D to reach the conditioner point. Grease only the disc seating on the double joint.
4. Grease the PTO shaft following the shaft maker's instructions.

Tools: Grease gun, Rags

1. Swing the cutterbar into the horizontal position and park on level ground.
2. Turn each angle drive until its drain screw is at the lowest point.
3. Undo the breather valve and drain screw and let the oil run out. Replace the drain screw.
4. Refill through the filling hole (the right-hand gearbox 1.0 L, the left-hand gearbox 1.5 L) until the dipstick shows the full mark.
5. Clean the breather valve after the first 10 hours and then at regular intervals, so it stays free.
6. If you take the angle drive apart, the flange faces must be resealed with Claas CASCO adhesive (part no. 201 802.1) when you put it back.

Tools: Drain tray (3 L), Spanner for the drain screws, Funnel, Rags

1. Look at your gearbox. Version A has an oil filling and check screw and is emptied by sucking the oil out. Version B has a filler cap with dipstick and a drain screw.
2. Drain the old oil.
3. Fill with the right quantity: 1.0 L for version A, 0.8 L for version B.
4. Check the level at the check screw (version A) or the dipstick (version B).

Tools: Drain tray, Oil suction pump (version A), Spanner, Funnel

1. Warm the cutterbar up by running it for about 8–10 minutes, then swing the mower unit into the horizontal position.
2. Stop the PTO and the tractor and take the key out. Wait 10 minutes for the oil to settle before checking the level.
3. Drain the oil through the opening with the magnetic plug. Clean the magnetic plug before refitting it.
4. Pour fresh oil in through the filling opening up to the level of the check opening.
5. Claas says a warm cutterbar is no worry as long as the discs still turn by hand at working temperature.

Tools: Drain tray (6 L), Spanner, Funnel, Rags

1. Stop the mower and make sure it cannot restart. Take the PTO shaft off.
2. The belts are right when the notch on the crank lines up with the welded strap. Turn the crank to tension.
3. Check that the crank link pin sits in the hole for your PTO speed (540 or 1000 rpm).
4. If one belt is worn or broken, replace all of them together.

Tools: Crank (on the machine)

1. Fold the mower out and release the pressure in the circuit.
2. Look at every hose and fitting for chafing, cracks and leaks. Never feel for a leak with your hand.
3. Find the date on each hose (for example 1Q2006 is the first quarter of 2006) and replace any hose more than 6 years old.

Tools: Rags, Card (for finding leaks)

1. Clean the dirt off the mower unit.
2. Drain the oil from the angle drives and the mower head and refill to the right level with new oil.
3. Grease every lubrication point until grease comes out of the bearings. Let the mower run for a short time.
4. Check the machine for wear and damage and have repairs done.
5. Take the V-belts off and store them in a dry place.
6. Clean off rust marks and touch up the paint.
7. Grease the PTO shaft guard tubes so they do not freeze, and clean and grease the shaft.
8. Store the machine in a dry building, in working position, away from any fertiliser.

Tools: Pressure washer (keep it away from bearings), Grease gun, Drain tray