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11
G
The chain has the proper tension when it lies against the
bottom edge of the guide bar and can be easily pulled by hand
about 5 mm (a little under 1/4") up from the guide bar.
Check the chain tension frequently - new chains tend to get
longer during use!
When checking the chain tension the motor must be switched
off and the power supply plug pulled out.
HINT:
Use 2 or 3 saw chains alternately for even wear of the chains,
sprocket and guide bar running surfaces.
In order to guarantee a uniform wear of the groove in the bar the
bar should be turned over whenever replacing the chain.
Checking the chain tension
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12
The UC 3001A, UC 3501A and UC 4001A comes with an
inertial chain brake as standard equipment. If kickback occurs
due to contact of the guide-bar tip with wood (see SAFETY
PRECAUTIONS, page 7), the chain brake will stop the chain
through inertia if the kickback is sufficiently strong.
The chain will stop within a fraction of a second.
Run-out brake
The UC 3001A, UC 3501A and UC 4001A come with a run-out
brake as standard equipment.
The run-out brake ensures that the chain comes to a stop
immediately when the ON/OFF switch is released, thus
preventing the chain from continuing to run and presenting a
hazard.
Testing of the run-out brake is described on page 14.
Chain brake
H
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 (I/11) will
automatically actuate the chain brake.
To engage the chain brake manually, simply push the hand
guard (I/11) forward (towards the tip of the saw) with your left
hand (arrow 1).
Releasing the chain brake
Pull the hand guard (I/11) towards you (arrow 2) until you feel
it catch. The brake is now released.
Note:
When the chain brake is actuated the power supply to the
motor will be cut off. Testing of the chain brake is described on
page 13.
I
Chain and run-out brake maintenance
The brake systems are very important safety features, and
like any other part they are subject to a certain amount of
wear. Regular inspection and maintenance is important
for your personal safety, and can be properly performed
only by a MAKITA service centre.
SERVICE