Stihl TS 440 Instruction Manual page 17

7 Abrasive wheel brake
NOTICE
The cutting wheel brake must be released before
opening the throttle and before using the cut-off
machine.
Increasing engine speeds with the cutting wheel
brake engaged even for a short time results in
damage to engine, clutch and cutting wheel
brake.
7.3 If the cutting wheel brake can‐
not be released with the engine
running
– Note regarding required maintenance for the
cutting wheel brake
– Note regarding required repair for the cutting
wheel brake
3
► Hold down button (3) on control panel for
3 seconds with the engine running
► Pull brake handle in the direction of the han‐
dlebar and release
If this allows the cutting wheel brake to be
released, the cutting wheel brake requires main‐
tenance.
► Carry on working and consult a STIHL servic‐
ing dealer after finishing the work
► Arrange for the required maintenance to be
carried out on the cutting wheel brake
This procedure should be carried out afresh each
time the engine is started. The number of such
procedures is recorded in the control unit.
If this still does not allow the cutting wheel brake
to be released, the cutting wheel brake requires
repair.
► Stop work and consult a STIHL servicing
dealer
► Arrange for the cutting wheel brake to be
repaired
7.4 Retensioning the front V belts
The V belts belong to the cutting wheel brake.
0458-520-8321-B
1
2
If the front V belt slips or squeals when acceler‐
ating or working, the front V belt is not tensioned
correctly. The abrasive cutting wheel can remain
stuck during cutting.
► Undo bolt (1)
► Remove guard (2)
5
► Slacken nut (3). The front V belt (4) is ten‐
sioned
► Pull brake lever (5) in the direction of the han‐
dlebar and hold it there
► Turn the belt pulley (6) 3 turns. The tension is
evenly distributed.
► Release the brake lever (5)
► Tighten nut (3) with a tightening torque of 20
Nm
English
2
1
3
4
6
17