0478 192 9809 A - EN
48
Using slight pressure, press the level 
sensor (grass catcher box) (1) 
downwards. When doing so, it must move 
easily and a quiet "clicking" of the switch 
must be audible.
After the level sensor is released, it must 
automatically return upwards to the initial 
position.
● If the level sensor does not move easily 
or is dirty, carefully clean it using a 
brush – do not use water.
15.13 Mowing blade maintenance
Maintenance interval:
Every 25 operating hours
Maintenance operations:
– Check the mowing blade wear limits.
– RT 5112 Z, RT 6112 C, RT 6112 ZL, 
RT 6127 ZL:
Check the installation position of the 
mowing blades.
– Sharpen or replace the mowing blades 
if necessary (poor mowing result).
Routing of the V-belt and rotational 
direction of the mowing blades on the 
models RT 5097, RT 5097 C, RT 5097 Z:
Routing of the V-belt or toothed belt 
and rotational direction of the mowing 
blades on the models RT 5112 Z, 
RT 6112 C, RT 6112 ZL, RT 6127 ZL:
Checking the mowing blade wear 
limits:
Risk of injury!
Always wear gloves.
If you do not have the 
necessary expertise or 
auxiliary equipment, please always 
contact a specialist dealer (STIHL 
recommends STIHL specialist 
dealers).
Never touch the mowing blades 
before they have come to a 
standstill.
Always set down the mowing deck 
on a non-slip surface.
The V-belt is twisted through 180° 
due to the double diversion at the 
positions A.
Maintenance and checking of 
toothed belts may only be carried 
out by STIHL specialist dealers.
Risk of injury!
A worn mowing blade may break off 
and cause serious injuries. The 
instructions for blade maintenance 
must therefore always be observed. 
Mowing blades are subject to 
differing degrees of wear 
depending on the location and 
duration of use. If you use the 
machine on sandy ground or use it 
frequently under dry conditions, the 
mowing blade will be subjected to 
greater loads and will wear more 
quickly than normal.
Caution!
Always replace the blade 
fastening screw and the retaining 
washer when replacing the mowing 
blade.