50 Chain and Bar Manual
Condition
Points of all drive link tangs
battered.
Cause
Drive links bottoming in sprocket.
This is brought about by excessive
wear on tooth tips through chatter of
loose chain.
Remedy
Install new chain sprocket and new
chain. Tension chain properly.
6.1.2 Cutters and Tie Straps
Condition
Uniform wear on all cutters as far as
wear marks and opposing tie straps.
Cause
Normal cutting with correctly
sharpened and tensioned chain and
properly functioning chain
lubrication.
Remedy
Install a new chain.
Condition
Excessive wear on all cutters and
opposing tie straps under the rear
rivets (usually accompanied by
frequent breaking of drive links)
Cause
a) Backward sloping side plate (side
plate angle too wide).
a) Forward sloping side plate (side
plate angle too small).
c) Depth gauge setting too low.
d) Dull cutters.
e) Chain too loose.
In all cases the cutters tend to sit up
at the front.
Remedy
a), b) and d) Sharpen all cutters
correctly.
c) File back all cutters until specified
depth gauge setting is obtained.
e) Tension chain properly.
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