Cracking noise at metering device.

Seeds too big, e.g. beans.

Remove tensioning sleeve from agitator shaft.

Seeds have attracted moisture.

Do not leave seed in hopper overnight.

Seed rate changes by itself.

Spindle for seed rate adjustment is loose.

Tighten the nuts on the crank.

Cell wheel is sticky.

Clean the cell wheel; check the cleaning brush and replace if necessary.

Fine seed: red gearwheel not engaged.

Engage the red gearwheel.

Fine seed: even with micrometering, seed rate does not drop below 4-5 kg/ha.

Seal lip on metering housing has been eaten by rodents.

Replace the seal lip.

Seal lip not properly in contact with cell wheel.

Adjust position of seal lip.

Drill is delivering excessive amounts of seed.

Handle turned too fast during calibration.

Turn no faster than one revolution per second.

Fine seed: red gearwheel not engaged.

Select micrometering.

Amount of seed delivered is too high or too low.

Incorrect drive wheel ratio in drive housing.

Check no. of gear-teeth against spare parts list.

Incorrect setting.

Set correctly.

Error when weighing the seed.

Check the scales.

ZX,OM750A010738 -19-06SEP05-1/2

Amount of seed delivered too low.

Micrometering is selected.

Switch off micrometering.

Fine seed: cells are dirty, cleaning brush is jammed.

Thoroughly clean cells and cleaning brush.

On 6-m version, the two metering devices are not calibrated for the same seed rate.

Each metering device must deliver the desired amount of seed (Kg/hectare).

Seeds not reaching any of the openers.

Venturi cone is blocked, drive shaft not connected.

Run the engine at correct speed, connect the drive shaft.

Track markers fold too quickly, too slowly or not at all.

Restrictor missing in the hydraulic coupler.

Install restrictor.

Restrictor in the hydraulic coupler is blocked.

Clean the restrictor.

Both hydraulic track markers fold at the same time.

Sequence valve is defective.

Replace sequence valve.

Hose blocked with seed.

Openers are blocked (e.g. with soil). Normal seed: butterfly valve is set for fine seed.

Clean the blocked opener. Set the butterfly valve for normal seed.

Hose bent, sagging or deformed.

Check hose inside and outside hopper. If necessary, make the hoses shorter.

Fan speed too low.

Make sure engine speed is correct.

ZX,OM750A010738 -19-06SEP05-2/2