Removing And Installing The Blade; Sharpening The Mowing Blade; Sharpening Instructions; Maintenance Interval - Stihl RM 3 RT Manuel D'utilisation

● Use a slide calliper to measure blade
thickness at 5 points at least. In
particular, minimum thickness must
also be ensured in the area of the blade
wings.
● Place a ruler (2) against the front blade
edge as shown and measure
permissible grinding.
Blade thickness: > 2 mm
Permissible grinding: < 5 mm
The blade must be replaced,
– if it is damaged (notches, cracks),
– if the measured values are achieved at
one or more points or are outside the
permissible limits.
12.3 Removing and installing the
blade
● Tilt the mower upwards into the
cleaning position. ( 12.1)
Removing:
● Unscrew blade fastening screw (1)
using an A/F 17 spanner.
● Remove blade (2) together with blade
fastening screw (1) and retaining
washer (3).
42
Installing:
Risk of injury!
The blade (2) must only be installed
as shown. The curved wings must
point upwards.
Observe the specified torque when
tightening the blade fastening
screw, as the secure attachment of
the cutting tool depends on this.
Additionally secure blade fastening
screw (1) with Loctite 243.
Replace spring washer (3) each
time the blade is installed and blade
fastening screw (1) each time the
blade is replaced.
● Clean the blade contact surface and
blade bushing.
● Install blade (2) with the curved wings
pointing upwards (towards the
16
machine).
17
● Install blade fastening screw (1) with a
new retaining washer (3) and tighten.
Tightening torque:
60 - 65 Nm

12.4 Sharpening the mowing blade

If you do not have the necessary expertise
or auxiliary equipment, we recommend
that you have the blade sharpened by a
specialist dealer. Operation of the machine
is impaired in the case of an incorrectly
sharpened blade (incorrect sharpening
angle, imbalance etc.).

Sharpening instructions

● Remove the mowing blade. (
● Cool the mowing blade during
sharpening, e.g. with water.
The blade must not be allowed to
display blue colouring, as this would
reduce its cutting quality.
● Sharpen blades evenly to prevent
vibration due to imbalance.
● Observe a sharpening angle of 30°.
● Observe the wear limits (
12.5 Engine

Maintenance interval:

See engine instruction manual.

General information:

Observe the operating and maintenance
instructions in the attached engine
instruction manual.
To achieve a long service life, it is always
particularly important to maintain a
sufficient level of oil and to change the oil
and air filter regularly.
The recommended oil change intervals as
well as information on engine oil and oil
capacities can also be found in the engine
instruction manual.
The cooling ribs must always be kept clean
to ensure that the engine is adequately
cooled.

12.6 Wheels and gearbox

The wheel bearings are maintenance-free.
The gearbox is maintenance-free.
12.3)
12.2).
0478 111 9938 A - EN