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Troubleshooting guide, Maintenance (cont.), Sharpening the chain – Shindaiwa 62891-94311 User Manual

Page 18

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50°

CS_top plate angle greater than
originally titled CHN-07

20°

CS_top plate angle less than

CHN-08

CHN-05

CHN-04

CHN-03

CHN-02

A

B

A=B

0.025"

CHN-18

18

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!

NOTE:

For consistent filing angles, use a filing
guide

Using a 4.5 mm round file, sharpen all

cutters to a 30° angle.

1.

Using a depth gauge

joiner.

Using a flat file

to round the

front corner on a

depth gauge.

Using a filing

gauge.

As required, lower the depth gauges to

a height of 0.6 mm.
After all depth gauges have been

adjusted, use a flat file to round each

depth gauge leading edge to its original

curvature and angle.

3.

4.

Correct Filing Technique

Filing Problems

Top plate

angle less than

recommended

Backslope

on side plate

cutting edge

Top plate angle

more than

recommended

Hook in side

plate cutting

edge

Cause

File held at less than
recommended angle.
Result

Slow cutting. Requires extra
effort to cut.
Remedy

File cutters to recommended
angle.

Cause

File held too low or the file
was too small.
Result

Rough cutting. Chain grabs.
Cutters dull quickly or won’t
hold a cutting edge.
Remedy

Check file size. File cutters to
recommended angle.

Cause

File held too high or the file
was too large.
Result

Cutters won’t feed into
wood. Slow cutting. Must
force chain to cut. Causes
excessive bottom wear.
Remedy

File cutters at recommended
angle. Check file size.

Cause

File held at more than
recommended angle.
Result

Cutting angle is very sharp
but will dull fast. Cutting
action rough and erratic.
Remedy

File cutters to recommended
angle.

Low depth

gauge

High depth

gauge

Cause

Wrong gauge setting or no
gauge used.
Result

Rough cutting. Chain grabs.
Saw won’t pull chain through
wood. Excessive wear on the
cutter heel.
Remedy

If depth gauges are too
low, the chain is no longer
serviceable.

Cause

Depth gauge never filed.

Result

Slow cutting. Must force
chain to cut. Will cause
excessive wear on the cutter
heel.
Remedy

Lower gauges to
recommended setting.

Correct angle

on top plate

Slightly protruding hook

or point (curve on non-

chisel chain)

Top of depth gauge at

correct height below top

plate

Front of depth

gauge rounded

0.025” (0.64 mm)

All cutting edges must be sharpened equally

After all cutters are sharpened, use

a depth gauge joiner to measure the

height of each depth gauge.

2.

Maintenance (cont.)