Manual Makita BUC122 (page 12 of 84) (English, German)

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Pruning trees

Fig.12

Fig.13

CAUTION:

• Keep all parts of the body away from the saw chain

when the motor is operating.

• Hold the chain saw firmly with both hands when

the motor is running.

• Do not overreach. Keep proper footing and

balance at all times.

Bring the tip guide/lower guide into contact with the

branch to be cut before switching on. Cutting without

bringing the tip guide/lower guide into contact with the

branch may cause the guide bar to wobble, resulting in

injury to operator.

When cutting thick branches, first make a shallow

undercut and then make the finish cut from the top.

Fig.14

If you try to cut off thick branches from the bottom, the

branch may close in and pinch the saw chain in the cut.

If you try to cut off thick branches from the top without a

shallow undercut, the branch may splinter.

Fig.15

If you cannot cut the timber right through with a single

stroke:

Apply light pressure to the handle and continue sawing

and draw the chain saw back a little; then apply the

spike a little lower and finish the cut by raising the

handle.

Fig.16

Carrying tool

Fig.17

Always remove the battery cartridge from the tool and

overlap the guide bar with the scabbard before carrying

the tool. Also cover the battery cartridge with the battery

cover.

MAINTENANCE

CAUTION:

• Always be sure that the tool is switched off and the

battery cartridge is removed before attempting to

perform inspection or maintenance.

• Always wear gloves when performing any

inspection or maintenance.

Sharpening the saw chain

CAUTION:

• Always remove the battery cartridge and wear

safety gloves when performing work on the saw

chain.

Fig.18

Sharpen the saw chain when:

− Mealy sawdust is produced when damp wood is

cut;

− The chain penetrates the wood with difficulty, even

when heavy pressure is applied;

− The cutting edge is obviously damaged;

− The saw pulls to the left or right in the wood. The

reason for this behaviour is uneven sharpening of

the saw chain, or damage to one side only.

Sharpen the saw chain frequently, but remove only a

little material each time.

Two or three strokes with a file are usually sufficient for

routine resharpening. When the saw chain has been

resharpened several times, have it sharpened in a

MAKITA specialist repair shop.

File and file guiding

− Use a special round file (optional accessory) for

saw chains, with a diameter of 4 mm, to sharpen

the chain. Normal round files are not suitable.

Fig.19

− The file should only engage the material on the

forward stroke. Lift the file off the material on the

return stroke.

− Sharpen the shortest cutter first. The length of this

cutter is then the gauge dimension for all other

cutters on the saw chain.

− Guide the file as shown in the figure.

− 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 markings 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.

− After sharpening the chain, check the height of the

depth gauge using the chain gauge tool (optional

accessory).

Fig.20

− 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.21

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 filter at the oil discharge hole

Small dust or particles may be built up in the oil filter at

the oil discharge hole during operation.

Small dust or particles built up in the oil filter may impair

the oil discharge flow and cause an insufficient

lubrication on the whole saw chain.

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Makita BUC122 Manual

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