Removing And Installing The Mowing Blade - Stihl RMI 422 Instruction Manual

Check the blade width A and blade
thickness B using a slide calliper.
If the blade width is less than 25 mm or the
blade thickness is less than 1,3 mm at any
point, the mowing blade must be replaced.
16.4 Removing and installing the
mowing blade
● Activate the disabling
device ( 5.2) and wear
protective gloves.
● Tilt the robotic mower onto its
side and lean it securely against a
stable wall. Carefully clean the mowing
deck and mowing blade. (
164
Removing the blade:
Push in both tabs (1) on the
carrier plate with one hand and
hold. Remove the fastening
nut (2) with your other hand.
Remove the mowing blade together with
the fastening nut.
Installing the mowing blade:
Risk of injury!
Check the blade for damage before
installation. The blade must be
replaced if notches or cracks are
identified or if its width is less than
25 mm, or its thickness is less than
1,3 mm at any point. (
The carrier plate and the
fastening nut must also be
replaced if damaged (e.g. broken,
worn). The fastening nut in
particular must engage cleanly in
the carrier plate.
● Clean the blade, carrier plate and
16.2)
fastening nut prior to installation.
Fit the mowing blade (1) and fastening
nut (2) on the carrier plate (3) as
illustrated. Ensure the correct position of
the retainers (4) in the mowing blade.
16.3)
Screw on the fastening nut (1) as far as
possible. Several clicks are audible during
tightening. Ensure secure seating of the
mowing blade by shaking carefully.
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