Replacing Carbon Brushes; Replacing The Sprocket - Makita BUC250 Instruction Manual

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.
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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.
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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.
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2
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Always fit a new locking ring when replacing the
sprocket.
1. Sprocket
2. Locking ring
2
1. Locking ring
2. Sprocket

Replacing carbon brushes

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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.
1
2
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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.
16
1. Limit mark
1
1. Brush holder cap
2. Screwdriver