Stihl MS 280 C-Q Instruction Manual page 25

Disengaging the chain brake
N Pull the hand guard back toward the
front handle.
Always disengage chain brake
before accelerating the engine
(except when checking its
operation) and before starting
cutting work.
High revs with the chain brake
engaged (chain locked) will
quickly damage the powerhead
and chain drive (clutch, chain
brake).
Chain brake is activated by inertia
If the kickback force of the saw is high
enough.
The hand guard is accelerated towards
the bar nose – even if your left hand is
not behind the hand guard, e.g. during
the felling cut.
The chain brake will operate only if the
front hand guard has not been modified
in any way.
MS 280 C-Q
Checking operation of the coasting
brake
Before starting work: Open the throttle
wide and then release the rear handle.
The chain must stop moving within less
than a second.
Checking operation of the chain
brake
Before starting work: Run engine at idle
speed, engage the chain brake (push
hand guard towards bar nose) and open
the throttle wide for no more than
3 seconds – the chain must not rotate.
The hand guard must be free from dirt
and move freely.
In case of doubt about the above
functions, contact your servicing dealer
for assistance. STIHL recommends that
you have servicing and repair work
carried out exclusively by an authorized
STIHL servicing dealer.
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
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