Replacing Carbon Brushes; Troubleshooting; Optional Accessories - Makita UC3050A Instruction Manual

Replacing carbon brushes

Remove and check the carbon brushes regularly. Replace
when they wear down to the limit mark. Keep the carbon
brushes clean and free to slip in the holders. Both carbon
brushes should be replaced at the same time. Use only
identical carbon brushes. (Fig. 44)
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
After replacing brushes, plug in the tool and break in
brushes by running tool with no load for about 10 minutes.
(Fig. 45)
Storing tool
Biologically degradable saw chain oil can only be kept for
a limited period. Beyond two years after manufacture,
biological oils begin to acquire an adhesive quality, and
cause damage to the oil pump and components in the
lubricating system.
– Before taking the chain saw out of service for a longer
period, empty the oil tank and fill it with a small quantity
of engine oil (SAE 30).
Malfunction status
The chain saw does not start.
Chain does not run.
Insufficient performance.
No oil on the chain.
Chain does not stop even the
chain brake is engaged.
The tool vibrates abnormally.
014314

OPTIONAL ACCESSORIES

CAUTION:
• These accessories or attachments are recommended
for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
• Saw chain
• Guide bar cover
• Guide bar
• Saw chain oil
Possible cause
No power supply.
Cable defective.
Tool malfunction.
Chain brake is engaged.
Carbon brush worn down.
Oil tank is empty.
Oil guide groove is dirty.
Oil pump adjusting screw
incorrectly adjusted.
Brake band worn down.
Loose guide bar or saw chain. Adjust the guide bar and saw chain tension.
Tool malfunction.
– Run the chain saw briefly to flush all residue of the
biological oil out of the tank, lubricating system and
saw mechanism.
NOTE:
• When the chain saw is taken out of service, small
quantities of chain oil leaks from it for some time
afterwards. This is normal, and is not a sign of a fault.
Store the chain saw on a suitable surface.
Before returning the chain saw to service, fill up with fresh
BIOTOP saw chain oil.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.
TROUBLE SHOOTING
Before asking for repairs, conduct your own inspection
first. If you find a problem that is not explained in the
manual, do not attempt to dismantle the tool. Instead, ask
Makita Authorized Service Centers.
Connect to the power supply.
Check the power supply.
Stop using the tool immediately, and ask your local
authorized service center.
Stop using the tool immediately, and ask your local
authorized service center.
Release chain brake.
Ask your local authorized service center for repair.
Fill the oil tank.
Clean the groove.
Adjust the oil pump feed rate.
Stop using the tool immediately, and ask your local
authorized service center.
Stop using the tool immediately, and ask your local
authorized service center.
NOTE:
• Some items in the list may be included in the tool
package as standard accessories. They may differ
from country to country.
Noise
The typical A-weighted noise level determined according
to EN60745:
Sound pressure level (L
Sound power level (L
Uncertainty (K): 2.5 dB (A)
Wear ear protection.
Vibration
The vibration total value (tri-axial vector sum) determined
according to EN60745:
Work mode: cutting wood
Vibration emission (a
Uncertainty (K): 1.5 m/s
Remedy
ENG905-1
): 90.8 dB (A)
pA
): 101.8 dB (A)
WA
ENG900-1
2
): 5.2 m/s
h
2
17