54 Power Mower 5400 Edition 02.97
5. Maintenance
Bottom knife
ESM universal-
municipal-cutter bar
Top knife
Correct Grinding
Wrong Grinding
Cutter Bar
Re-grinding the Mowing Knives
W
Wear safety goggles and
gloves!
After 4–20 operating hours, depend-
ing on the strain the mowing knives are
exposed to, they become blunted and
regrinding is necessary.
For this purpose, we recommend to use
a hand grinder of 15,000 to 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 of mowing knives is essential
for clean and smooth mowing.
l
For grinding, use front of grinding pin
and slide it from knife back to blade tip.
l
Blades must not heat up. They are
destroyed when they turn blue (glowed
out and soft).
l
Do not round-off the tips of the blades
(P).
l
Do not grind the blades in a bow (P).
l
Remove any burr with a hand grind-
ing stone.
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