McCulloch M4620 Manual de Instruções descarregar pdf (Página 14)

14

CHAIN SHARPENING

WARNING: Improper chain sharpen-

ing techniques and/or depth gauge mainte-

nance will increase the chance of kickback

which can result in serious injury .

WARNING: Wear protective gloves

when handling chain. The chain is sharp and

can cut you even when it is not moving.

Conditions which indicate the need for chain

sharpening:

S Reduction in size of wood chips. The size

of the wood chip will decrease as the chain

gets duller until it becomes more like a

powder than a chip. Note that dead or

rotted wood will not produce a good chip.

S Saw cuts to one side or at an angle.

S Saw has to be forced through the cut.

Tools required:

S 3/16 inch (4,5 mm) diameter round file and

file holder

S Flat file

S Depth gauge tool

TO SHARPEN CHAIN:

1. MoveON/STOPswitchtotheSTOP

position.

2. Check chain for proper tension. Adjust

chain tension if necessary.

3. Sharpen cutters.

S To sharpen the cutters, position the

file holder level (90˚) so that it rests

on the top edges of the cutter and

depth gauge.

NOTE: The chain has both left and

right hand cutters.

Depth Gauge

File

File Holder

Cutter

90˚

S Align the 25˚ file holder marks paral-

lelwith the bar and to the center of the

chain.

Cutter

Cutter

25˚

File Holder Line

S Sharpen cutters on one side of the

chain first. File from the inside of each

cutter to the outside. Then, turn the

chain saw around and repeat the pro-

cess for the other sid e of the chain.

S File on the forward stroke only. Use 2

or 3 strokes per cutting edge.

S Keep all cutters the same length

when filing.

S File enough to remove any damage

to cutting edges (side plate and top

plate of cutter).

A

ll Cutters

Same Length

Remo

v

e Damage

Top Plate

Side Plate

S File chain to meet the specifications

as shown.

25˚

60˚

60˚

Rounded

Corner

0,65 mm

Right

Hook Angle

Wrong

Squared O

f

f

Corner

Too Much Hook

A

ngle

WARNING: Maintain the proper hook

angle according to the manufacturer’s specifi-

cations for the chain you are using. Improper

hook angle will increase the chance of kick-

back which can result in serious injury .

4. Check and lower depth gauges.

Depth Gauge Tool

Depth Gauge

File

S Place gauge tool on cutter. If the

depth gauge is higher than the depth

gauge tool, file it level to the top of the

depth gauge tool.Maintain rounded

front corner of depth gauge with a flat

file.

NOTE: The very top of the depth

gauge should be flat with the front

half rounded off with a flat file.

If you require further assistance or are unsure

about performing this procedure, contact your

authorized service dealer.

CARBURETOR ADJUSTMENTS

WARNING: Thechainwillbemoving

during most of this procedure. Wear your pro-

tective equipment and observe all safety pre-

cautions. The chain must not move at idle

speed.

The carburetor has been carefully set at the

factory. Adjustments may be necessary if

you notice any of the following conditions:

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