10. - Maintenance and storage
GMD16-GMD20
77
KN225BGB_A
Disc mower
10.3.5 Inspection of knives and securing
elements
Knives
-
Inspect systematically all knives before the
machine is operated to:
• ensure the cutting quality.
• ensure safety in use.
• Prevent cutterbar damage risks.
- Replace knives in the following cases:
• Damaged knives: Very rough conditions can
cause knives to crack and become deformed.
• Worn knives:
The length C of a knife must exceed 65 mm (2.6’’).
The width B of a knife, measured at A = 10 mm
(0.4’’) of the disk, must exceed 34 mm (1.34’’).
Elongation of hole due to wear:
- Check that there is still a minimum value L
equalling 9 mm (0.35’’).
- Always replace both knives per disc to avoid
creating an out-of-balance force.
Immediately replace worn or damaged parts with
genuine KUHN parts.
A
B
C
L
