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46 – English
MAINTENANCE
Checking and adjusting the cutting
unit’s ground pressure
To achieve the best cutting results the cutting unit
should follow the underlying surface without pres-
sing too hard against it.
The pressure is adjusted with a screw on each side
of the machine.
1. Check the air pressure in the tyres 60 kPa
(0.6 kp/cm
2
/8.5 PSI).
2. Place the Rider on a flat surface.
3. Put the lifting lever in the mowing position.
4. Place a set of bathroom scales under the cutting
unit’s frame (front edge) so that it rests on the
scales. If necessary a block can be placed
between the frame and scales so that the
support wheels do not bear any weight.
5. Adjust the unit’s ground pressure by screwing in
or out the adjusting screws located behind the
front wheels on both sides.
The ground pressure should be between
12 and 15 kg (26.5-33 lb).
Cutting Height
1. Place the Rider on a flat surface.
2. Loosen the nut on the height adjustment strut.
3. Measure the distance between the ground and
cutting unit’s edge at the front of the cover. The
cutting unit should have a slight slant, with the
rear edge 2-4 mm (1/8") higher than the front
edge.
The distance between the front edge and the
ground should be:
• 40 mm for BioClip 90 and Combi 103
• 35 mm for Side ejector 97, rear ejector 97 and
Combi 112.
4. Tighten the nut.
5. Check that the parallelism has not changed. If
so, the parallelism must be readjusted.
6. Check and if necessary adjust the cutting unit’s
ground pressure.
7. Fit the front cover.
IMPORTANT INFORMATION
When changing the cutting unit, you must
readjust the parallelism and cutting height.