Makita DUC356Z - Инструкция по эксплуатации - Страница 16

16 ENGLISH

MAINTENANCE

CAUTION:

Always be sure that the tool is 

switched off and the battery cartridge is removed 

before attempting to perform inspection or 

maintenance.

CAUTION:

Always wear gloves when perform-

ing any inspection or maintenance.

NOTICE:

Never use gasoline, benzine, thinner, 

alcohol or the like. Discoloration, deformation or 

cracks may result.

To maintain product SAFETY and RELIABILITY, 

repairs, any other maintenance or adjustment should 

be performed by Makita Authorized or Factory Service 

Centers, always using Makita replacement parts.

Sharpening the saw chain

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. 

(caused by uneven sharpening of the saw chain or 

damage to one side only)

Sharpen the saw chain frequently but a little 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 our 

authorized service center.

Sharpening criteria:

WARNING:

An excessive distance between 

the cutting edge and depth gauge increases the 

risk of kickback.

► 

Fig.25:

1.

 Cutter length 

2.

 Distance between cutting 

edge and depth gauge 

3.

 Minimum cutter 

length (3 mm)

—  All cutter length must be equal. Different cutter 

lengths prevent the saw chain from running 

smoothly and may cause the saw chain to break.

—  Do not sharpen the chain when the cutter length 

has reached 3 mm or shorter. The chain must be 

replaced with new one.

—  The chip thickness is determined by the distance 

between the depth gauge (round nose) and the 

cutting edge.

—  The best cutting results are obtained with following 

distance between cutting edge and depth gauge.

• 

Chain blade 90PX : 0.65 mm

• 

Chain blade 91PX : 0.65 mm

• 

Chain blade 25AP : 0.65 mm

► 

Fig.26

—  The sharpening angle of 30° must be the same on 

all cutters. Different cutter angles cause the chain 

to run roughly and unevenly, accelerate wear, and 

lead to chain breaks.

—  Use a suitable round file so that the proper sharp

-

ening angle is kept against the teeth.

• 

Chain blade 90PX : 55°

• 

Chain blade 91PX : 55°

• 

Chain blade 25AP : 55°

File and file guiding

—  Use a special round file (optional accessory) for 

saw chains to sharpen the chain. Normal round 

files are not suitable.

—  Diameter of the round file for each saw chain is as 

follows:

• 

Chain blade 90PX : 4.5 mm

• 

Chain blade 91PX : 4.0 mm

• 

Chain blade 25AP : 4.0 mm

—  The file should only engage the cutter on the for

-

ward stroke. Lift the file off the cutter on the return 

stroke.

—  Sharpen the shortest cutter first. Then the length 

of this shortest cutter becomes the standard for all 

other cutters on the saw chain.

—  Guide the file as shown in the figure.

► 

Fig.27:

1.

 File 

2.

 Saw chain

— 

The file can be guided more easily if a file holder 

(optional 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).

► 

Fig.28:

1.

 File holder

—  After sharpening the chain, check the height of the 

depth gauge using the chain gauge tool (optional 

accessory).

► 

Fig.29

—  Remove any projecting material, however small, 

with a special flat file (optional accessory).

—  Round off the front of the depth gauge again.

Cleaning the guide bar

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

They may clog the bar groove and impair the oil flow. 

Clean out the chips and sawdust every time when you 

sharpen or replace the saw chain.

► 

Fig.30

Cleaning the sprocket cover

Chips and saw dust will accumulate inside of the 

sprocket cover. Remove the sprocket cover and saw 

chain from the tool then clean the chips and saw dust.

► 

Fig.31

Cleaning the oil discharge hole

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

charge hole during operation. These dust or particles 

may impair the oil to flow and cause an insufficient 

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.

1.

Remove the sprocket cover and saw chain from 

the tool.

2.

Remove the small dust or particles using a slotted 

screwdriver or the like.

► 

Fig.32:

1.

 Slotted screwdriver 

2.

 Oil discharge hole