Lemken Zirkon 7 / 9 / 10 power harrows service schedule

1. Stop the tractor, take the key out and support the raised machine.
2. Hold each tine or rotor and rock it to feel for play in the bearing.
3. Replace any bearing with noticeable play before it damages the gearing.

Tools: Pry bar, Spanners

1. Stop the tractor, take the key out and clean the nipples.
2. Zirkon 7 / 9: grease the points marked 8, 25 and 250 hours at those intervals, and all of them before and after a long break.
3. Zirkon 10: lower control link, feed discs and track marker disc bearings every 25 hours; hydraulic linkage, lifting links and others every 50 hours; guide pins and cylinder rods before a winter break.
4. Before a winter break, grease piston rods with acid-free grease and the surfaces of the feed and track marker discs.

Tools: Grease gun, Rags

1. Raise the machine fully and support it. Never work under an unsupported harrow.
2. Check every tine for wear or breaks. Replace worn tines. On the Zirkon 10, tines can be changed with the harrow mounted and raised, or lifted by crane, folded back and rested on the roller.
3. Tighten the tine nuts. Check every other nut and bolt at the same time.
4. Adjust the roller scrapers and replace any that are worn.

Tools: Torque wrench, Spanners, Supports for the raised machine

1. Park the power harrow on level, firm ground, stop the tractor and take the key out.
2. Take out the filler and vent plugs, then the drain plug, and let all the oil run out. Dispose of the oil properly.
3. Refit the drain plug and fill to the correct level: the control plug hole on the Zirkon 7, the marks on the Zirkon 9 scale or the check screw on the Zirkon 10.
4. Keep everything clean while you do it. Use only clean oil of the listed grade.

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

1. Stop the tractor and take the key out. On the Zirkon 7 and 9, check the level with the machine run up (warm); on the Zirkon 10, with the implement at operating temperature, folded out and on level ground.
2. Unscrew the cover cap (GG9) and look at the grease. It must reach at least to the middle of the gear teeth. If it is white and cloudy, change it.
3. Change it at 4,000 hours, or sooner if contaminated, using only the Olit 00 grease and the quantity for your model.

Tools: Spanner, Clean funnel or grease pump

1. Fold the track marker in and stop the tractor.
2. Knock out the remains of the old bolt.
3. Fit a new M10 × 45 / 8.8 shear bolt (301 3240). Do not use a stronger bolt.

Tools: Spanner, Drift

1. Look at every hose for damage and leaks. Replace any hose over 6 years old, or damaged.
2. Check the PTO shaft slides in and out smoothly. Grease the shaft and joints. Always chain the guard to a fixed part.
3. Do not pressure wash the harrow for the first 6 weeks. Afterwards keep the nozzle 60 cm away, 100 bar maximum.

Tools: Spanners, Grease gun

1. Clean the machine, keeping the nozzle at least 60 cm from the paint and bearings.
2. Grease every point marked for before a winter break, including guide pins and the feed and track marker disc surfaces.
3. Coat the hydraulic piston rods with acid-free grease and push the protective caps on the couplings.
4. After the break, grease again, check oil levels and retighten bolts before work.

Tools: Grease gun, Pressure washer (keep 60 cm away)