Chain Brake; Connecting To Power Supply - Stihl MSE 250 C Instruction Manual

Chain Brake

Locking the chain
in an emergency
–
The chain brake is activated by pushing
the hand guard toward the bar nose with
your left hand (position ƒ) – or by inertia
in certain kickback situations: The chain
is stopped and locked.
Disengage the chain brake.
Pull the hand guard back toward the
N
front handle (position ‚).
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
MSE 250 C
toward the bar nose – even if your left
hand is not behind the hand guard, e.g.
during a horizontal cut.
The chain brake will operate only if the
hand guard has not been modified in any
way.
Checking operation of the chain brake
Before starting work:
Move hand guard to position ‚ –
N
chain brake is disengaged.
Switch on the saw.
N
Push the hand guard towards the
N
bar nose (position ƒ).
The chain brake is working properly if
the saw chain comes to a standstill
within a few fractions of a second.
The hand guard must be free from dirt
and move freely.
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 servicing and repair work carried
out exclusively by an authorized STIHL
servicing dealer. Maintain the following
servicing intervals:
Full-time usage: every 3 months
Part-time usage: every 6 months
Occasional usage: every 12
months

Connecting to Power Supply

The voltage and frequency of the
machine (see rating plate) must match
the voltage and frequency of the power
connection.
The minimum fuse protection of the
power connection must comply with the
specifications – see "Specifications".
The machine must be connected to the
power supply via an earth-leakage
circuit breaker to disconnect the power
supply if the differential current to earth
exceeds 30 mA.
The power connection must correspond
to IEC 60364 and relevant national
regulations.
Extension Cords
Make sure your electrical cord set is in
good condition and suitable for outdoor
use. When using an extension cord, be
sure to use one heavy enough to carry
the current your product will draw. An
undersized extension cord may cause a
drop in line voltage resulting in loss of
power and overheating. The table below
shows the correct size (AWG) to use for
your machine (Cord types SJW or
SJTW) depending on cord length and
nameplate ampere rating. If in doubt,
use the next heavier gauge. The smaller
the gauge number, the heavier the cord.
Cord length (ft) Wire gage (AWG)
50 12
Appropriate extension cords are
available in special stores for electrical
equipment or from your STIHL dealer.
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