KUHN EL 131, Assembly & Operators Manual

Page: 35 / 48

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2° FITTING THE BLADES
The blades can be fitted in two different ways, depending on the job to get done :
- 3 pairs of blades per flange
3 right blades (D) and 3 left blades (G) (as fitted at factory)
- 2 pairs of blades per flange
2 right blades (D) and 2 left blades (G)
a) Power Tiller rotor with curved blades or mulch blades (fig. 40 and photo 41)
To recognise if blades are right or left, point the
cutting edge in the direction of rotation (F) and note
the direction of their curved portion.
A = machine forward direction
To fit blades helicoidally, proceed as follows :
- Always start fitting each flange with the same type
of blade, placing it opposite mark (R), shown by a
chamfer or a hollow (see fig. 40) ;
- all blades should be fitted on the left face of the
flanges (see fig. 41).
- Fixing bolt heads should face the blades, washers
and nuts should face the flanges.
Tighten nuts to a torque of 24 daNm (177 ft.lbs)
on all curved and mulch blades.
NUMBER OF BLADES
TYPE 250 300
Number of rotor flanges 10 12
TYPE OF TYPE OF NUMBER OF
FORMATION BLADES BLADES
2 pair RIGHT 20 24
formation LEFT 20 24
3 pair RIGHT 30 36
formation LEFT 30 36