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Engaging the chain brake (braking)
If the kickback is strong enough the sudden acceleration of the
guide bar combined with the inertia of the hand guard (1) will
automatically actuate the chain brake.
To engage the chain brake manually, simply push the hand
guard (1) forward (towards the tip of the saw) with your left
hand (arrow 1).
Releasing the chain brake
Pull the hand guard (1) towards you (arrow 2) until you feel it
catch. The brake is now released.
Chain brake
The PS-460, PS-510, PS-5105 and PS-5105 H comes with
an inertia chain brake as standard equipment. If kickback
occurs due to contact of the guide-bar tip with wood (see SAFETY
PRECAUTIONS, page 10), the chain brake will stop the chain
through inertia if the kickback is sufciently strong.
The chain will stop within a fraction of a second.
The chain brake is installed to block the saw chain be-
fore starting it and to stop it immediately in case of an
emergency.
IMPORTANT: NEVER run the saw with the chain brake acti-
vated (except for testing, see “Testing chain brake”)! Doing so
can very quickly cause extensive engine damage!
ALWAYS release the chain brake
before starting the work!
Checking the chain tension
The tension of the chain is correct if the chain rests against
the bottom side of the guide bar and can still be easily turned
by hand.
While doing so the chain brake must be released.
Check the chain tension frequently - new chains tend to get
longer during use!
When checking the chain tension the engine must be switched
off.
NOTE:
It is recommended to use 2-3 chains alternatively.
In order to guarantee uniform wear of the guide bar the bar
should be turned over whenever replacing the chain.
Retightening the saw chain
Loosen the nuts (2) about one turn with the universal wrench.
Raise the tip of the guide bar a little and turn the chain tensioning
screw (4) to the right (clockwise) until the saw chain is again up
against the bottom edge of the guide bar (see circle).
While keeping the tip of the guide bar raised, tighten the nuts
(2) again with the universal wrench.