30 Grassland Mower Hopper 5000 Edition 02.97
5. Maintenance
Grinding the Mowing
Knives
W
Wear safety goggles and
gloves!
After 4–20 operating hours, depending
on the wear on the knives, these be-
come dull and regrinding is necessary.
For this purpose, we recommend using
a hand grinder of 15,000 – 20,000 rpm
with a pot-shaped grinding pin of 25 mm
in diameter and approx. 35 mm in length
or a special grinding tool.
Grinding the knives is essential for a
clean and smooth operation.
l
Grinding is done using the front of
the grinding pin only, guiding it from the
back of the knife to the tip of the blade.
l
Blades must not heat in the process.
They are destroyed when they turn blue
(glowed out and soft).
l
Do not round off the blade tips (P).
l
Do not grind the blades in a curve
(P).
l
Use a grinding stone to remove any
burr.
Bottom knife
ESM universal-municipal
cutter bar
Top knife
Wrong grinding Correct grinding
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