Manual Makita BUC250 (page 20 of 84) (English, German, Dutch, Danish, French, Italian, Portuguese, Spanish)

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- The file can be guided more easily if a file holder

(accessory) is employed. The file holder has markings

for the correct sharpening angle of 30° (align the mark-

ings parallel to the saw chain) and limits the depth of

penetration (to 4/5 of the file diameter).

Guide the file as shown in the figure. (Fig. 34)

- After sharpening the chain, check the height of the

depth gauge using the chain gauge tool (optional

accessory).

- Remove any projecting material, however small, with a

special flat file (optional accessory).

- Round off the front of the depth gauge again.

- Wash away dust and particles from saw chain after

adjusting the height of depth gauge.

Cleaning guide bar (Fig. 35)

Chips and sawdust will build up in the guide bar groove,

clogging it and impairing oil flow. Always clean out the

chips and sawdust when sharpening or replacing the saw

chain.

Cleaning the oil discharge hole

Small dust or particles may be built up in the oil dis-

charge hole during operation.

Small dust or particles built up in the oil discharge hole

may impair the oil discharge flow and cause an insuffi-

cient lubrication on the whole saw chain.

When a poor chain oil delivery occurs at the top of guide

bar, clean the oil discharge hole as follows.

Remove the battery cartridge from the tool.

Remove the sprocket cover and saw chain from the tool.

(Refer to the section titled “Installing or removing saw

chain”.)

Remove the small dust or particles using a slotted bit

screwdriver with a slender shaft or the like. (Fig. 36)

Insert the battery cartridge into the tool.

Pull the switch trigger to flow built-up dust or particles off

the oil discharge hole by discharging chain oil. (Fig. 37)

Remove the battery cartridge from the tool.

Reinstall the sprocket cover and saw chain on the tool.

Replacing the sprocket (Fig. 38 & 39)

Before fitting a new saw chain, check the condition of the

sprocket.

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.

Always fit a new locking ring when replacing the

sprocket.

Replacing carbon brushes (Fig. 40 & 41)

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.

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 per-

formed by Makita Authorized Service Centres, always

using Makita replacement parts.

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.

• Various type of Makita genuine batteries and chargers

• Saw chain

• Scabbard

• Guide bar complete

• File

• Tool bag

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Makita BUC250 Manual

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