Makita UC 3000 - Manuel (Page 16)

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Replacing the saw chain
CAUTION: Use only chains and guide bars designed for
this saw (see the Extract from the spare parts list)!
Check the sprocket (A/1) before mounting a new chain.
The sprocket is located underneath the clutch drum (I/2).
CAUTION:
Worn out sprockets (B) may damage the new chain and must
therefore be replaced.
Do not attempt to replace the sprocket yourself. Sprocket
replacement requires special training and tools and must be
done at a MAKITA service center.
B A
NOTE:
The carbon brush is very delicate, so be careful not to let it drop.
When taking it out, be sure to note the position it was
installed in, since each brush is run in with the rotor.
- Use the combination wrench to unscrew the cover (C/2),
and then pull out the brush (C/3).
- If the wear limit has not yet been reached, put the brush
back in the same position and screw the cover (C/2) back
on.
- Run the saw briefly (about a minute) so the brushes can
run in again.
C
Cause
no power supply,
cable defective
chain brake actuated
Mains fuse blown
Carbon brushes worn down
oil tank empty,
oil guide groove dirty
Brake band worn down
System
total
Carbon brushes
Oil tank, oil pump
Brake
Observation
electric motor does not function
low pulling power
no oil on the saw chain
Saw chain does not stop instantly
Malfunction
Chain saw does not work
insufficient performance
no chain lubrication
Chain brake
Troubleshooting
Inspecting and replacing
the carbon brushes
IMPORTANT:
Inspect the carbon brushes at regular intervals! A notch
on the brush shows the limit of wear.
To maintain product SAFETY and RELIABILITY, repairs, any other
maintenance or adjustment should be performed by MAKITA Authorized
or Factory Service Centers, always using MAKITA replacement parts.