Saw Chain
45 Mechanical Timber Harvesting Handbook
Saw Chain Troubleshooting
8. Backslope on the side plate.
Cause: File held too high or the file is too large.
Grinders: Saw chain ground at the wrong top-
plate cutting angle, grinding wheel is too large,
or the grinding wheel is not grinding deep
enough
into the body of cutter.
Symptoms: Slow cutting. Premature wear to
saw chain and guide bar rails.
Remedy: Resharpen cutters using the correct
file guide in the right size held in the correct
position.
9. Low depth gauges.
Cause: Depth gauge never lowered.
Symptoms: Rough cutting. Saw chain grabs.
Excessive wear to the heel of cutters, opposing
tie-straps, guide bar rails. Top-plate breakage
and/or saw chain stretch.
Remedy: In most cases, cutters cannot be filed
back enough to correct for depth gauges that
are too low. Replace the saw chain.
10. High depth gauges.
Cause: Too much depth gauge removed;
depth gauge damaged in use.
Symptoms: Slow cutting. Excessive wear
to the saw chain and guide bar rails.
Remedy: File depth gauges down to their
correct height.
Note: See pages 31 – 38 for the proper filing techniques
to use when applying the remedies above.
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