Chain Brake Maintenance; Information Before You Start - Stihl MS 170 Notice D'emploi

The chain brake is also activated by
the inertia of the front hand guard
if the kickback force of the saw is high
enough:
The hand guard is accelerated toward
the bar nose – even if your left hand is
not behind the hand guard, e.g. during
felling cut.
The chain brake will operate only if the
hand guard has not been modified in any
way.
Check operation of chain brake
Before starting work:
Run engine at idle speed, engage the
chain brake (push hand guard toward
bar nose). Accelerate up to full throttle
for no more than 3 seconds – the chain
must not rotate. The hand guard must be
free from dirt and move freely.
MS 170, MS 180, MS 180 C

Chain brake maintenance

The chain brake is subject to normal
wear. It is necessary to have it serviced
and maintained regularly by trained
personnel. STIHL recommends that you
have the maintenance and repair work
performed by a STIHL servicing dealer
at the following intervals:
Full-time professional
users: every 3
months
Semi-professional
users (in agriculture
and construction): every 6
months
Hobby and
occasional users: every 12
months
Information
Before You Start
STOP
0
The four positions of the
Master Control lever
$ = Engine off –
ignition is switched off.
# = Normal run position –
engine runs or can fire.
To move the Master Control lever from #
n l
to or , press down the throttle
trigger interlock and squeeze throttle
trigger at the same time.
n
=Warm start – this position is used to
start a warm engine. The Master
Control lever moves to the normal
run position as soon as the throttle
trigger is squeezed.
l
=Cold start – this position is used to
start a cold engine.
English
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