63.
GUIDE BARS
GUIDE BARS
Rails around the tip of solid-nose
bars show small cracks or
broken-out sections.
Remedy: See V.
Rail on one side is worn thin,
or low.
Remedy: See U.
GUIDE-BAR TROUBLESHOOTING
Most guide bar problems occur in the bar rails, and care caused by
four things: lack of lubrication, incorrect chain tension, and accidents
or irregular operating techniques which pinch the rails or push the drive
links sideways against the bar rails.
31 32
Rails are worn down, groove
becomes shallow.
Remedy: See T.
Outsides of rails develop wire
edges.
Remedy: See T.
PROBLEM
Worn Rail Conditions
33 34
35 36
Rails around the tip of solid-nose
bars are split at the bottom of the
bar groove.
Remedy: See V.
Rails along the bar body o around
the tip of sprocket-nose bars show
blue discoloration.
Remedy: See W.
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