Reactive Forces - Stihl MS 151 TC Instruction Manual

English
Check that the muffler is in perfect working con‐
dition.
Do not use the machine if the muffler is damaged
or missing – risk of fire, damage to hearing!
Never touch a hot muffler – risk of burns!
The condition of the anti-vibration elements influ‐
ences vibration behaviour – inspect anti-vibration
elements periodically.
Inspect chain catcher – replace if damaged.
Switch off the engine
– To check the chain tension
– To retension the chain
– To replace the chain
– For remedying malfunctions
Observe sharpening instructions – for safe and
proper handling, always keep the chain and
guide bar in flawless condition. Keep the chain
properly sharpened, tensioned and well lubrica‐
ted.
Change chain, guide bar and chain sprocket in
due time.
Regularly check that the clutch drum is in perfect
working condition.
Always store fuel and chain lubricant only in the
specified type of containers and ensure they are
correctly labelled. Store in a dry, cool and secure
place protected against light and sunlight.
In the event of a chain brake malfunction, switch
off the machine immediately – risk of injury! Con‐
sult a servicing dealer – do not use the machine
until the malfunction has been remedied, see
"Chain brake".
3

Reactive Forces

The most common reactive forces that occur dur‐
ing cutting are: kickback, pushback and pull-in.
3.1 Dangers of kickback
Kickback can result in serious or fatal
injury.
8
(Kickback) occurs when the saw is suddenly
thrown up and back in an uncontrolled arc
towards the operator.
3.2 Kickback occurs if, e. g.,
– when the upper quadrant of the bar nose unin‐
tentionally contacts wood or another solid
object, e.g. when another limb is touched acci‐
dentally during limbing.
– when the chain at the nose of the guide bar is
pinched in the cut.
3.3 Quickstop chain brake:
This device reduces the risk of injury in certain
situations – it cannot prevent kickback. When
activated, the chain brake stops the saw chain
within a fraction of a second –
see the section "Saw chain" in this Instruction
Manual.
3.4 To reduce the risk of kickback
– Work cautiously and avoid situations which
could cause kickback.
– Hold the saw firmly with both hands and main‐
tain a secure grip.
– always cut at full throttle.
– Be aware of the location of the guide bar nose
at all times.
– do not cut with the bar nose.
– Take special care with small, tough limbs, they
may catch the chain.
– never cut several limbs at once.
– do not overreach.
3 Reactive Forces
0458-508-8321-B