Working With The Chain Saw - Makita UC3520A Instruction Manual

Clean the area around the oil filler cap shown in the
figure thoroughly to prevent any dirt from entering the oil
tank.
Fig.13
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.14
WARNING:
Always withdraw the mains plug before checking
•
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
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 the saw 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.15
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
•
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.16
CAUTION:
Should the saw chain not stop immediately when
•
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.17
Check the oil delivery as follows:
Start the chain saw.
With the saw running, hold the saw chain approximately
15 cm above a tree trunk or the ground. If lubrication is
adequate, the oil spray will produce a light oil trace.
Observe the wind direction, and do not expose yourself
to the oil spray unnecessarily.
CAUTION:
If an oil trace is not formed, do not use the saw.
•
The lifespan of the chain will otherwise be reduced.
Check the oil level. Clean the oil feed groove and
the oil feed
"MAINTENANCE ").

WORKING WITH THE CHAIN SAW

Bucking
Fig.18
For bucking cuts, rest the serrated rail shown in the
figure on the wood to be cut.
With the saw chain running, saw into the wood, using the
rear handle to raise the saw and the front one to guide it.
Use the serrated rail as a pivot.
Continue the cut by applying slight pressure to the front
handle, easing the saw back slightly. Move the serrated
rail further down the timber and raise the front handle
again.
When making several cuts, switch the chain saw off
between cuts.
13
hole in the bar (refer to