KUHN GMD350, Operator'S Manual, Page: 87 / 100

Trouble shooting guide
Disc mower
GMD350 - 350-FF
85
$ Trouble shooting guide
-
„ Problem „ Cause „ Remedy
Uneven stubble.
Dull or broken knives. Replace knives.
Knives not installed correctly.
Make sure the arrow on the
knife upper face is pointing in
the disc's direction of rotation.
Insufficient disk speed. Check belt tension.
Too low PTO speed (rotational
frequency).
Increase speed to 540 min
-1
.
Cutter bar pitch angle too high. Reduce angle.
Soil build up in front of the
cutterbar.
Too much cutterbar down
pressure.
Adjust suspension hydraulic
circuit.
Very wet working conditions.
Adjust main frame height with
regards to the ground.
Bad ground contour
adaptation.
Incorrect main frame setting.
Adjust main frame height with
regards to the ground.
Excessive ground speed. Reduce ground speed.
Hydraulic cylinder blocked.
Set hydraulic valve in floating
position.
Incorrect mowing unit
floatation.
Adjust suspension hydraulic
circuit.
Cutter bar pivot bushes are
worn or seized.
Check condition of pivot
bushes. Replace if necessary.
Stubble too long.
Incorrect cutter bar pitch angle.
Modify pitch angle using top
link.
Machine too light.
Adjust suspension hydraulic
circuit.
Check frame position.