Working With The Chain Saw - Makita UC3050A Bedienungsanleitung

Checking the switch action
CAUTION:
Before plugging in the tool, always
check to see that the switch trigger actuates properly
and returns to the "OFF" position when released.
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
Do not pull the switch trigger hard without depressing
the lock-off button. This may cause switch breakage.
Checking the chain brake
NOTE:
• If the chain saw fails to start, check whether the
chain brake is released. To release the chain
brake, pull the hand guard backwards firmly until
you feel it engage.
► Fig.18: 1. Front hand guard 2. Lock 3. Unlock
► Fig.19: 1. Front hand guard 2. Unlock 3. Lock
Check the chain brake as follows:
1. Hold the chain saw with both hands when switch-
ing it on. Hold the rear handle with your right hand,
the front handle with your left. Make sure that the
bar and the chain do not contact with any object.
2. First press the lock-off button, then the switch
trigger. The saw chain starts immediately.
3. Press the front hand guard forwards using the
back of your hand. Make sure that the saw chain
comes to an immediate standstill.
CAUTION:
• If the saw chain does not stop immediately,
do not use the saw under any circumstances.
Consult Makita authorized service centers.
Checking the run-down brake
Switch on the chain saw.
Release the switch trigger completely. Make sure the
saw chain comes to a standstill within a second.
CAUTION:
• If the saw chain does not stop immediately,
do not use the saw under any circumstances.
Consult Makita authorized service centers.
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 oil level sight shown in
the figure.
► Fig.20: 1. Oil level sight
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 hole in the bar (refer to
"MAINTENANCE ").
Adjusting the chain lubrication
► Fig.21
You can adjust the oil pump feed rate with the adjusting
screw.

WORKING WITH THE CHAIN SAW

CAUTION:
• Always use a front handle and rear handle and
firmly hold the tool by both front handle and rear
handle during operations.
• Always secure the timber to be cut, otherwise
the cut fragments may cause personal injury.
Bucking
► Fig.22: 1. Spike bumper
For bucking cuts, rest the spike bumper 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 spike bumper as a pivot.
Continue the cut by applying slight pressure to the front
handle, easing the saw back slightly. Move the spike
bumper further down the timber and raise the front
handle again.
When making several cuts, switch the chain saw off
between cuts.
CAUTION:
• If the upper edge of the bar is used for cutting,
the chain saw may be deflected in your direction
if the chain becomes trapped. For this reason,
cut with the lower edge, so that the saw will be
deflected away from your body.
► Fig.23
Cut wood under tension on the pressure side (A) first.
Then make the final cut on the tension side (B). This
prevents the bar from becoming trapped.
► Fig.24
Limbing
CAUTION:
• Limbing may only be performed by trained
persons. A hazard is presented by the risk of
kick-back.
When limbing, support the chain saw on the trunk if
possible. Do not cut with the tip of the bar, as this pres-
ents a risk of kickback.
Pay particular attention to branches under tension. Do
not cut unsupported branches from below.
Do not stand on the felled trunk when limbing.
15 ENGLISH