Guide Bar Troubleshooting - Oregon CHAINSAW Maintenance And Safety Manual

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
Rails are worn down, groove
becomes shallow.
Remedy: See T.
33
Rail on one side is worn thin,
or low.
Remedy: See U.
35
Rails around the tip of solid-nose
bars are split at the bottom of the
bar groove.
Remedy: See V.
GUIDE BARS
PROBLEM
Worn Rail Conditions
32
34
36
GUIDE BARS GUIDE BARS
Outsides of rails develop wire
edges.
Remedy: See T.
Rails around the tip of solid-nose
bars show small cracks or
broken-out sections.
Remedy: See V.
Rails along the bar body o around
the tip of sprocket-nose bars show
blue discoloration.
Remedy: See W.
63.