Craftsman 138.98946 Operator's Manual page 24

[] Every time the chain is filed, check the depth
gauge clearance,
Use a Flat File and a Depth Gauge Jointer to
lower all gauges uniformly. Depth gauge jointers
are available in .020 in. to .035 in. Use a .025 in.
depth gauge jointer. After lowering each depth
gauge, restore original shape by rounding the
front. Be careful not to damage adjoining drive
links with the edge of the file.
Depth gauges must be adjusted with the flat file
in the same direction the adjoining cutter was
filed with the round file. Use care not to contact
cutter face with flat file when adjusting depth
gauges.
GUIDE BAR MAINTENANCE
See figure 40.
When the guide bar shows signs of wear, re-
verse it on the saw to distribute the wear for
maximum bar life. The bar should be cleaned
every day of use and checked for wear and
damage.
Feathering or burring of the bar rails is a nor-
mal process of bar wear. Such faults should be
smoothed with a file as soon as they occur.
A bar with any of the following faults should be
replaced.
[] Wear inside the bar rails which permits the
chain to lay over sideways.
[] Bent guide bar.
[] Cracked or broken rails.
[] Spread rails.
in addition, guide bars with a sprocket at their
tip must be lubricated weekly with a grease sy-
ringe to extend the guide bar life. Using a grease
syringe, lubricate weekly in the lubricating hole.
Turn the guide bar and check that the lubrication
holes and chain groove are free from impurities.
24 - English