Lemken Juwel / EurOpal / VariOpal mounted reversible ploughs service schedule

1. Lower the plough to the ground, stop the tractor engine, take the key out and apply the parking brake.
2. Grease the turnover (slewing gear) bearing, its pivot points and the cylinder adapters.
3. Grease the Optiquick or Trulign adjustment centre and the turnbuckles, plus the thread of the angle adjustment.
4. Grease the depth/transport wheel swing axle and wheel bearings, and the swivel brackets and control rod.
5. Grease the overload device bearings (the HX device where fitted), the disc coulter bearings and the joints of all hydraulic rams.
6. Grease the polished wear surfaces, pins and adjusters regularly as well.

Tools: Grease gun, Rags

1. Lower the plough onto the ground or blocks, stop the tractor engine and take the key out. Never work under a raised plough.
2. Check every share, point, landside, wedge and mouldboard for damage and wear. Replace worn parts before the wear reaches the frog or leg.
3. On Dural bodies the point is separate from the wing share: change the point on its own when only the tip has gone.
4. On DuraMaxx mouldboards the strips change without tools.
5. Clean the seats, fit new parts with new bolts and tighten them evenly.
6. Recheck the pitch afterwards: the distance from point to frame should be the same on all bodies.

Tools: Socket set and breaker bar, Torque wrench, Wire brush, Gloves, Eye protection

1. Lower the plough to the ground and stop the tractor engine.
2. Drift out the broken halves.
3. Fit a new bolt of exactly the listed size and strength class. Never use a bolt from the bin.
4. Check the leg and beam were not bent before ploughing on.
5. Carry spare shear bolts of the right number on the plough.

Tools: Spanners, Drift, Hammer

1. Keep everyone clear: the system is always under pressure, bodies trip upwards and sideways, and they drop if the pressure falls.
2. Standard version: open the shut-off valve under the gauge, set the pressure with the tractor spool (P lowers it, T raises it), then close the valve. Keep it at least 125 bar.
3. Comfort version: the factory-set maximum and minimum are selected by pressurising A or B for a few seconds.
4. To release the pressure, always use the relief valve, with the tractor spool in float.
5. In work the spool must stay in float.

Tools: Pressure gauge on the plough

1. Lower the plough, stop the tractor engine and release the pressure.
2. Check the hose date stamps and replace any over 6 years old, porous or leaking. Never feel for a leak with your hand.
3. Check the turnover ram, its pins and valves for leaks.
4. When turning, raise the plough fully, move the lever to H and the frame turns about 180°. Return the lever to N and wait 3–6 seconds before turning again.
5. A single-acting spool can be used only with a separate return line to the tractor tank.

Tools: Spanners, Rags, Card (for finding leaks)

1. EurOpal: set the width per body in the frame holes to suit the soil.
2. VariOpal: after the basic Optiquick setting, set the width from the seat with the Memory or adjuster ram.
3. Set the front furrow width with the turnbuckle, or the hydraulic or Memory ram.
4. Check the point-to-frame distance is the same on every body.
5. Set skimmers 5–10 cm deep and disc coulters 7–9 cm deep, 2–3 cm from the landside line.

Tools: Tape measure, Spanners

1. Clean the plough. Do not pressure-wash a new plough in its first 6 weeks; after that keep the nozzle at least 60 cm away, at most 100 bar and 50 °C.
2. Grease every point on the chart.
3. Coat the polished mouldboards, shares, points and landsides with grease.
4. Grease the exposed piston rods of the turnover, width and other rams with non-acid grease.
5. Remove any lower subsoilers (pull pin 2) and park the plough on a flat, stable base.

Tools: Pressure washer, Grease gun, Brush or rag

1. After the first 2 hours on a new or rebuilt plough, retighten every wheel nut and every other bolt and nut.
2. Then check them weekly while ploughing.
3. EurOpal wheel bolts: 300 Nm for ø 18 mm, 125 Nm for ø 14 mm. For other bolts use the torque table in your handbook.

Tools: Torque wrench, Socket set