HRB122-152-182
58
8. - Instructions for work
KN135HGB_D
Power harrows
8.3.1 Drive speed
Groundspeed must be adapted to the encountered
working conditions.
Use of the power harrow entails limits which must be respected in all situations and that are
often related to:
- Weather conditions: Avoid working during and immediately after rain, wait until the
ground to be worked is completely drained.
- Soil types: Smooth clods indicate too malleable or too humid soil to be worked in; Wait
until ground is completely drained. Soil concistency is ideal when clods crumble without
sticking.
- Tractor power: Adapt working depth, speed and rotor speed to power available and work
to be carried out. Never exceed the maximum allowable DIN engine power: 59 kW (80 hp).
- The nature of the work: the power harrow is an excellent implement for secondary tillage
and seedbed preparation after conventional ploughing, chisel ploughing or soil
loosening. It is far less efficient for primary tillage work especially on hard and dry
ground.
The clod size depends on:
• The rotor speed.
• The forward speed.
• The working depth.
• The Crumbler roller being fitted or not with removable bars.
Example: large clods result from a low rotor speed and a high forward speed
.
