KUHN ALTERNA 500R, Assembly & Operators Manual

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ADJUSTMENTS
6) Cutting height adjustment
Cutting height is adjusted by changing the position of the
central skid and replacing the 2 side skids.
When the machine leaves the factory it is equipped with 2
low side skids (1). To achieve a higher cut the 2 low side
skids (1) can be replaced by 2 middle skids or by 2 raised
skids delivered with the machine.
To replace the skids proceed as follows:
- remove the screws (2)
- loosen the self-locking nuts (3),
- remove the outer skids (1) installed at the factory and
install the middle skids or raised skids in the same place,
with the same screws and nuts (2 and 3) (torque to
8.5 daNm / 63ft.lbs).
To adjust the cutterbar central skid (4) proceed as follows :
- remove bolt (5) and pull out pin (6)
- Raise or lower the central skid (4) to set it at the same
height as the two side skids (1),
- secure the skid (4) in its new position by inserting pin (6)
through the corresponding hole. Secure in place with bolt
(5).
7 ) C u t t e r b a r a n d c o n d i t i o n i n g u n i t
ground pressure
When the machine is in the working position (either on the
left or right side of the tractor, the underside of the
drawbar is horizontal), most of the cutterbar’s weight is
carried by a set of springs.
The ground pressure should be adjusted in
such a way that the left or right side of the
platform can be raised off the ground with a
force of 50 daN (which corresponds to a
weight of 50 kg/110 lbs).
Cutterbar down pressure is adjusted by
rotating bolt (6) after loosening lock nut (8).
- Rotating bolt (6) clockwise decreases down pressure.
- Rotating bolt (6) counter-clockwise increases down pres-
sure.
- Lock nut (7) prevents bolt (6) from moving upwards.
- Retighten lock nut (8) after each cutterbar ground pres-
sure adjustment.
Note : - For improved ease of adjustment, regularly lubri-
cate the threaded portion of bolt (6) and the
spherical area of its head.
- Check cutterbar and conditioning unit ground
pressure after the first hour of use.
Side skids Cutting height
Low 30 mm
Middle 40 mm
Raised 80 mm