Horsch Pronto DC service schedule

1. Check the mounting screws of the drawbar eye and link arm hitch for tightness at 560 N·m.
2. Check the ball and spherical cap for wear. The wear limit is reached when the gauge rests fully on the ball or goes into the cap. Replace worn parts (workshop job).
3. On the ball coupling, adjust the hold-down so its gap to the ball is no more than 0.5 mm, secure it with bolts and split pins, and refit the protective cap.
4. Replace the foam ring if damaged or heavily soiled, and grease the ball socket.
5. On a lower link hitch, check the pin against the wear sizes in your handbook (Cat 2 28.7 mm new, 28.0 mm wear limit; Cat 3 36.6 / 35.9 mm; Cat 4 50.8 / 50.1 mm).

Tools: Torque wrench, Wear gauge, Feeler gauge

1. Lower the machine, stop the tractor and make it safe.
2. Spin each disc by hand. It must turn freely with no roughness, play or damage.
3. Check disc wear and the preload washers. Do not set the preload too high on wet or loose soil: the discs can block and wear unevenly.
4. When fitting new discs, remove shims in left and right pairs under the disc bearing to bring the preload back.
5. Tighten the disc bearing screws to 130–150 N·m and the disc screws (6 × M8) to 38 N·m.
6. Replace the rubber mountings and coulters if they are aged or have lost tension.

Tools: Torque wrench, Socket set, Penetrating oil, Gloves

1. Lower the machine, stop the tractor, take the key out and secure the machine against moving.
2. Wipe each grease nipple clean, then grease the folding cylinder, filling auger, seed bar lift cylinder, lift shaft and coulter pressure spindle, fertiliser coulter, bout marker pivot, swinging drawbar and tractor link arm hitch. Some points are fitted on both sides of the machine (marked 2x).
3. Use the chart in your handbook for the exact number of points on your width.
4. Wipe off excess grease. Do not use a high-pressure washer on bearings.

Tools: Grease gun, Rags

1. Park on firm level ground and lower the machine. Never work under a raised machine unless it is mechanically supported.
2. Retighten all screwed and plug-in connections, the hydraulic connections, and the frame and connecting parts to the torque table in your handbook.
3. Tighten wheel nuts to 300 N·m (M18 × 1.5) or 510 N·m (M22 × 1.5), whichever your axle uses.
4. Check the fan impeller drive flange for tightness at the first 50 hours.

Tools: Torque wrench, Socket set

1. After the season, empty the hopper and open the fall sluice so any water can run out.
2. Clean the cell wheel with a brush and compressed air. Do not use a pressure washer on the metering unit.
3. Check the rotor runs true and that no cells stick. Check the sealing lip's condition and setting.
4. Turn the drive motor and bearings by hand to check for roughness, and run a function test.
5. Replace the sealing lip each year.

Tools: Brush, Compressed air, Screwdrivers

1. Do not use seed with sticky dressing: it upsets the metering. Check the hopper for foreign objects.
2. Fit the rotor and rape brushes (or the coarse-seed adapter frame, deflector and wide sealing lip) to suit the seed. Remove the accessories for grain and fertiliser.
3. Fill the hopper, open the flap under the metering unit and clear the fall sluice and pipes.
4. Hang the calibration bag on the rails and run the calibration from the E-Manager.
5. Close the flap and check it is sealed. Repeat for the second metering unit if you have twin hoppers.

Tools: Calibration bag or tray, Scales, E-Manager terminal

1. Check all hydraulic lines for leaks, chafing and fixing. Never feel for a leak with your hand.
2. Replace any hose over 6 years old (hose and crimp sleeve are stamped with the date).
3. Check the packer tyre pressure: 4.25 bar for 7.50-16 AS packer tyres, 2.80 bar for the optional front packer (185/65-15 AS).
4. Check the brake lines and hoses for damage, drain the air reservoir, clean the line filters and check the coupling heads for wear.
5. Have the pressure accumulator and hydraulics checked by an expert once a year.

Tools: Tyre gauge, Rags

1. Park under a roof if possible. Empty and clean the seed and fertiliser hoppers and blow out the coulters, seed lines, metering unit and fan with compressed air.
2. Wash the outside with plain water. Keep jets away from electrics, the fan, cylinders and bearings. Open the fall sluice. Clean off fertiliser well, as it corrodes quickly.
3. Spray the DiscSystem bearings with penetrating oil after cleaning, then turn the discs by hand to check they spin freely.
4. Wind the coulter pressure down and park in the working position to take the load off the rubbers. Open the clearing valve.
5. Take the load off the wheels, spray the hydraulic cylinder rods with corrosion protection, and do not spray plastic or rubber with oil.
6. Unplug the terminal and keep it dry. Grease all points.

Tools: Brush, Compressed air, Hose