Maintenance (cont.)

Sharpening the Chain

When the cutting edges of the blade become dull, they can be re-sharpened with a few strokes of a file.

In order to keep the blade in balance, all cutting edges must be sharpened equally.

In addition, inspect the chain for correct adjustment (more frequently with a new chain). The chain should feel snug but still pull freely. Refer to the section on “Adjusting the Chain” for adjustment procedures.

IMPORTANT!

File all cutters to the same angle and depth! Unequal filing may cause the saw to vibrate or cut erratically!

1.Using a 4.5 mm round file, sharpen all cutters to a 30° angle.

NOTE:

For consistent filing angles, use a filing guide

2.After all cutters are sharpened, use a depth gauge joiner to measure the height of each depth gauge.

3.As required, lower the depth gauges to a height of 0.6 mm.

4.After all depth gauges have been adjusted, use a flat file to round each depth gauge leading edge to its original curvature and angle.

Using a filing

gauge.

Using a depth gauge

joiner.

CHN-18

Using a flat file

to round the

front corner on a

depth gauge.

Correct Filing Technique

Correct angle

Slightly protruding hook

on top plate

or point (curve on non-

 

 

chisel chain)

 

Top of depth gauge at

 

correct height below top

 

plate

 

Front of depth

 

gauge rounded

A

All cutting edges must be sharpened equally

0.025” (0.64 mm)

A=B B 0.025"

Filing Problems

Top plate

Cause

Top plate angle

 

Cause

High depth

Cause

angle less than

File held at less than

more than

 

File held at more than

gauge

Depth gauge never filed.

recommended

recommended angle.

recommended

 

recommended angle.

 

Result

 

 

 

 

Result

 

 

 

 

 

 

Result

 

Slow cutting. Must force

 

 

 

 

Slow cutting. Requires extra

 

 

 

 

 

 

Cutting angle is very sharp

 

chain to cut. Will cause

 

 

 

20°

effort to cut.

50°

 

 

 

 

 

but will dull fast. Cutting

 

excessive wear on the cutter

 

 

 

Remedy

 

 

 

 

 

action rough and erratic.

 

heel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

File cutters to recommended

 

 

 

 

 

 

Remedy

CHN-04

Remedy

 

 

 

 

angle.

 

 

 

 

 

 

File cutters to recommended

 

Lower gauges to

 

 

 

 

 

 

 

 

 

 

 

angle.

 

recommended setting.

 

 

 

 

 

 

 

Hook in side

Cause

Backslope

 

Cause

Low depth

Cause

plate cutting

File held too low or the file

on side plate

 

File held too high or the file

gauge

Wrong gauge setting or no

edge

was too small.

cutting edge

 

was too large.

 

gauge used.

 

 

 

 

Result

 

 

 

 

 

 

Result

 

Result

 

 

 

 

Rough cutting. Chain grabs.

 

 

 

 

 

 

Cutters won’t feed into

 

Rough cutting. Chain grabs.

 

 

 

 

Cutters dull quickly or won’t

 

 

 

 

 

 

wood. Slow cutting. Must

 

Saw won’t pull chain through

 

 

 

 

hold a cutting edge.

 

 

 

 

 

 

force chain to cut. Causes

 

wood. Excessive wear on the

 

 

 

 

Remedy

 

 

 

 

 

 

excessive bottom wear.

 

cutter heel.

 

 

 

 

Check file size. File cutters to

 

 

 

 

 

 

Remedy

 

Remedy

 

 

 

 

recommended angle.

 

 

 

 

 

 

File cutters at recommended

 

If depth gauges are too

 

 

 

 

 

 

 

 

 

 

 

angle. Check file size.

 

low, the chain is no longer

 

 

 

 

 

 

 

 

 

 

 

 

 

serviceable.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

Page 18
Image 18
Shindaiwa 62888-94013, P231 manual Sharpening the Chain, For consistent filing angles, use a filing guide

P231, 62888-94013 specifications

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