Makita LXT DUC303Z - Инструкция по эксплуатации - Страница 16

16 ENGLISH

—  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°

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 (3/16″)

• 

Chain blade 91PX : 4.0 mm (5/32″)

—  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.35:

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.36:

1.

 File holder

—  After sharpening the chain, check the height of the 

depth gauge using the chain gauge tool (optional 

accessory).

► 

Fig.37

—  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.38

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.39

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 with a slender shaft or the like.

► 

Fig.40:

1.

 Slotted screwdriver 

2.

 Oil discharge hole

3.

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.

4.

Remove the battery cartridge from the tool. 

Reinstall the sprocket cover and saw chain on the tool.

Replacing the sprocket

CAUTION:

A worn sprocket will damage a 

new saw chain. Have the sprocket replaced in this 

case.

Before fitting a new saw chain, check the condition of 

the sprocket.

► 

Fig.41:

1.

 Sprocket 

2.

 Areas to be worn out

Always fit a new locking ring when replacing the 

sprocket.

► 

Fig.42:

1.

 Locking ring 

2.

 Sprocket

NOTICE:

Make sure that the sprocket is installed 

as shown in the figure.

Storing the tool

1.

Clean the tool before storing. Remove any chips 

and sawdust from the tool after removing the sprocket 

cover.

2.

  After cleaning the tool, run it under no load to lubri

-

cate the saw chain and guide bar.

3.

Cover the guide bar with the guide bar cover.

4.

  Empty the oil tank.