Maintenance - Makita UC3030A Betriebsanleitung

to the motor will be cut off.
If the saw does not start when the ON/OFF switch
(1) is actuated, it will be necessary to release the
chain brake.
- Pull the hand guard (6) firmly in the direction of the
arrow until you feel it catch. (Fig. 47)
Important:
These models are equipped with a starting current
limiter. This electronic component prevents too abrupt
starting of the electric motor.
Excess current cutoff: When the electrical current to the
saw exceeds the permissible level, the power supply to the
motor is automatically cut off. This prevents overheating
of the motor and resulting damage. To start the saw up
again, release the ON/OFF switch and press it again.
CAUTION: Do not use the saw if the current cutoff
repeatedly switches off the saw. Consult a MAKITA
service centre.
Checking the chain brake (Fig. 48)
Do not work with the chain saw without first
checking the chain brake!
- Start the motor as described (make sure you have a
good footing, and place the chain saw on the ground
in such a way that the guide bar is free of contact).
- Grasp the tubular handle firmly with one hand and
hold the grip with the other.
- Switch on the motor and press the hand guard (1) in
the direction of the arrow with the back of your hand
until the chain brake engages. The chain should stop
immediately.
- Switch the motor off Immediately and release the
chain brake.
Important: If the saw chain does not stop
instantly when you carry out this test, do not
under any circumstances use the saw! Take the
chain saw to a MAKITA service center.
Testing the run-out brake (Fig. 49)
Do not work with the saw without first testing the
run-out brake!
- Start the motor as described (make sure you have a
good footing, and place the chain saw on the ground
in such a way that the guide bar is free of contact).
- Grasp the tubular handle firmly with one hand and
hold the grip with the other.
- Switch the motor on and then back off. The chain
should come to a full stop within two second of
switching off the motor.
Important: If the saw chain does not stop within
two second when you carry out this test, do not
use the saw! Inspect the carbon brushes.
Checking the chain lubrication (Fig. 50)
Never saw when a sufficient chain lubrication is not
guaranteed. Otherwise the life of the sawing device will
be reduced. Before starting work check the oil level in
the tank and the oil feeding. Check the fed oil quantity
by following the instructions below:
- Start the electric chain saw.
- Hold the running chain saw approx. 15 cm above a
trunk or the ground (use an appropriate surface).
If the lubrication is sufficient, you will see a light oiltrace
20
because oil will be centrifuged from the chain saw. Pay
attention to the direction the wind is blowing and avoid
unnecessary exposure to the oil spray!

MAINTENANCE

Sharpening the saw chain (Fig. 51)
When working on the saw chain you must always
pull out the power supply plug and wear protective
gloves.
The chain needs sharpening when:
- the sawdust from sawing humid wood looks like wood
flour.
- the saw chain penetrates the wood only under great
pressure.
- the cutting edge is visibly damaged.
- the sawing device is pulled to the left or the right
during the sawing operation. This is caused by
uneven sharpening of the chain or by damage to one
side of it.
Important: Sharpen frequently, but without
removing too much metal!
Generally, 2-3 strokes of the file will be enough.
Have the chain resharpened in a service center when
you have sharpened it yourself several times.
Proper sharpening: (Fig. 52)
CAUTION:
Use only chains and guide bars designed for this
saw!
- All cutters must be of the same length (dimension a).
Cutters with different lengths result in rough running of
the chain and can cause cracks in the chain.
- Minimum cutter length is 3 mm (0.11"). Do not
resharpen the chain when the minimum cutter length
has been reached; at this point, the chain must be
replaced.
- The depth of the cut is determined by the difference in
height between the depth limiter (round nose) and the
cutting edge.
- The best results are obtained with a depth-limiter
depth of 0.64 mm (.025").
CAUTION:
Excessive depth increases the risk of kickback!
(Fig. 53)
- All cutters must be sharpened to the same angle, 30°.
Different angles result in a roughly, irregularly running
chain, increase wear and tear and cause chain
beakage. (Fig. 54)
- The 85° front rake of the cutter results from the cut
depth of the round file. If the proper file is used in the
right manner, the correct front rake will be obtained
automatically.
Files and how to work with them
- Sharpen using a special file holder with a saw chain
round file dia. 4.0 mm. Normal round files are not
appropriate for this work.
- The file should cut only when pushed forwards
(arrow). Lift the file when leading it backwards.
(Fig. 55)
- First sharpen the shortest cutter. The length of this
cutter is then the standerd for all other cutters of the
chain.
- Always guide the file as in fig. shown.