Chain Brake Maintenance; Information Before You Start - Stihl MS 170 Manual De Instrucciones

English / USA
The chain brake is designed to be
activated also by the inertia of the
front hand guard
if the forces are sufficiently high. The
hand guard is accelerated toward the
bar nose - even if your left hand is not
behind the hand guard, e.g. during a
felling cut. The chain brake will operate
only if it has been properly maintained
and 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.
36

Chain brake maintenance

The chain brake is subject to normal
wear. It is necessary to have it serviced
and maintained regularly by trained
personnel, such as your 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.
MS 170, MS 180, MS 180 C