17
If the chain saw receives frequent use, lubricate the
return sprocket bearing at least once a week. Before
adding new fresh grease, carefully clean the 2 mm hole
on the tip of the guide bar, then force a small quantity of
multi-purpose grease (optional accessory) into the hole.
Cleaning the oil guide
Fig.37
−
Clean the oil guide groove and the oil feed hole in
the bar at regular intervals.
New saw chains
Use two or three saw chains alternately, so that the saw
chain, sprocket and running surfaces of the bar wear
evenly.
Turn the bar over when changing the chain so that the
bar groove wears evenly.
CAUTION:
•
Only use chains and bars which are approved for
this model of saw (refer to "SPECIFICATIONS").
Fig.38
Before fitting a new saw chain, check the condition of
the sprocket.
CAUTION:
•
A worn sprocket damages a new saw chain. Have
the sprocket replaced in this case.
Always fit a new locking ring when replacing the sprocket.
Maintaining the chain and run-down brakes
The braking systems are very important safety features.
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
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
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.
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
performed by Makita Authorized Service Centers,
always using Makita replacement parts.
RAMIRENT
Summary of Contents for UC4550A
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