Guide Bar - Makita BUC250 Instruction Manual

Remove the sprocket cover and saw chain from the tool.
(Refer to the section titled " Installing or removing saw
chain ".)
Fig.36
Remove the small dust or particles using a slotted bit
screwdriver with a slender shaft or the like.
Insert the battery cartridge into the tool.
Fig.37
Pull the switch trigger to flow built-up dust or particles
off the oil discharge hole by discharging chain oil.
Remove the battery cartridge from the tool.
Reinstall the sprocket cover and saw chain on the tool.
Replacing the sprocket
Before fitting a new saw chain, check the condition of
the sprocket.
Fig.38
CAUTION:
A worn sprocket will damage a new saw chain.
•
Have the sprocket replaced in this case. The
sprocket need to be installed so that it always
faces as shown in the figure.
Fig.39
Always fit a new locking ring when replacing the sprocket.
Replacing carbon brushes
Fig.40
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.
Operating
time
Item
Chain saw
Saw chain

Guide bar

Chain brake
Chain lubrication
Switch trigger
Lock-off button
Oil tank cap
Chain catcher
Screws and nuts
014804
Inspection.
Cleaning.
Check at authorized service
center.
Inspection.
Sharpening if necessary.
Inspection.
Remove from the chain
saw.
Check the function.
Have it inspected regularly
at authorized service center.
Check the oil feed rate.
Inspection.
Inspection.
Check tightness.
Inspection.
Inspection.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Fig.41
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.
Storing tool
Clean the tool before storing. Remove any chips and
sawdust from the tool after removing the sprocket cover.
After cleaning the tool, run it under no load to lubricate
the saw chain and guide bar.
Cover the guide bar with the scabbard.
Remove oil from the oil tank to empty it and place the
chain saw.
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.
Instructions for periodic maintenance
To ensure long life, prevent damage and ensure the full
functioning of the safety features the following
maintenance must be performed regularly.
Warranty claims can be recognized only if this work is
performed regularly and properly. Failure to perform the
prescribed maintenance work can lead to accidents!
The user of the chain saw must not perform
maintenance work which is not described in the
instruction manual. All such work must be carried out by
authorized service centre.
Before Every
Everyday
operation week
17
Every 3 Before
Annually
month storage