Operation - Makita UC3020A Instruction Manual

OPERATION

Lubrication
Fig.13
CAUTION:
Always be sure that the tool is switched off and
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unplugged before lubricating the saw chain.
Lubricate the saw chain and bar using a biologically
degradable saw chain oil with an adhesion agent. The
adhesion agent in the saw chain oil prevents the oil from
being thrown off the saw excessively quickly. Mineral
oils must not be used, as they are harmful to the
environment.
CAUTION:
Prevent the oil from coming into contact with the
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skin and eyes. Contact with the eyes causes
irritation. In the event of eye contact, flush the
affected eye immediately with clear water, then
consult a doctor at once.
Never use waste
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carcinogenic substances. The contaminants in
waste oil cause accelerated wear of the oil pump,
the bar and the chain. Waste oil is harmful to the
environment.
When filling the chain saw with chain oil for the
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first time, or refilling the tank after it has been
completely emptied, add oil up to the bottom edge
of the filler neck. The oil delivery may otherwise be
impaired.
Clean the area around the oil filler cap shown in the
figure thoroughly to prevent any dirt from entering the oil
tank.
Fig.14
Unscrew the oil filler cap and add oil up to the lower
edge of the filler neck.
Screw the oil filler cap firmly back in place.
Wipe away any spilt chain oil carefully.
When the chain saw is used for the first time, it may
take up to two minutes for the saw chain oil to begin its
lubricating effect upon the saw mechanism. Run the
saw without load until it does so (see "CHECKS ").
CHECKS
Before starting work, carry out the following checks:
Checking the chain tension
Fig.15
WARNING:
Always withdraw the mains plug before checking
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the chain tension, and wear safety gloves.
The saw chain is correctly tensioned when it is in
contact with the underside of the bar and can be raised
approximately 2 - 4 mm from the bar by light finger
pressure.
Check the chain tension frequently, as new chains are
subject to elongation. A chain which is too slack can
oil. Waste oil contains
jump off the bar, and therefore presents an accident risk.
If the chain is too slack: Refer to the section titled "
Adjusting saw chain tension " and adjust
chain tension again.
Checking the switch action
CAUTION:
Always unplug the tool before testing the switch trigger.
Locking the switch trigger in the ON position is
prohibited.
Fig.16
It must not be possible to depress the switch trigger
unless the lock-off button is first depressed.
The switch trigger must not jam in the depressed
position. When released, the switch trigger must return
automatically to the OFF position, and the lock-off
button must return to its original position.
Checking the chain brake
NOTE:
If the chain saw fails to start, the chain brake must
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be released. Pull the hand guard backwards firmly
until you feel it engage.
Hold the chain saw with both hands when switching it
on. Hold the rear handle with your right hand, the front
handle with your left. The bar and the chain must not be
in contact with any object.
First press the lock-off button, then the switch trigger.
The saw chain starts immediately.
Press the hand guard forwards using the back of your
hand. The saw chain must come to an immediate
standstill.
Fig.17
CAUTION:
Should the saw chain not stop immediately when
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this test is performed, the saw may not be used
under any circumstances. Consult a MAKITA
specialist repair shop.
Checking the run-down brake
Switch on the chain saw.
Release the switch trigger completely. The saw chain
must come to a standstill within one second.
CAUTION:
Should the saw chain not come to a stop within
•
one second when this test is performed, the saw
must not be used. Consult a MAKITA specialist
repair shop.
Checking the chain oiler
Before starting work, check the oil level in the tank, and
the oil delivery.
The oil level can be seen in the sight glass shown in the
figure.
Fig.18
Check the oil delivery as follows:
Start the chain saw.
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the saw