Troubleshooting - Makita UC3050A Bedienungsanleitung

Maintaining the chain and run-down
brakes
The braking systems are very important safety fea-
tures. Like any other component of the chain saw, they
are subject to a certain degree of wear. They must
be inspected regularly by MAKITA authorized service
centers. This measure is for your own safety.
Replacing carbon brushes
► Fig.39: 1. Limit mark
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.40: 1. Brush holder cap 2. Screwdriver
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.
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.
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.
Tool malfunction.
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).
— 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 per-
formed 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.
Adjust the guide bar and saw chain tension.
Stop using the tool immediately, and ask your local
authorized service center.
18 ENGLISH
Remedy