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DEPTH-GAUGE CLEARANCE
1. The depth gauge should be maintained at a
clearance of 0.025 in. (0.6 mm), as shown
in Fig. 15. Use a depth-gauge tool (available
separately) to check the depth-gauge
clearances.
2. Check the depth-gauge clearance every time
the chain is filed. Use a flat file and a depth-
gauge jointer (both available separately) to
lower all gauges uniformly (Fig. 16). Depth-
gauge jointers are available in 0.020 in. to
0.035 in. (0.5 mm to 0.9 mm). Use a
0.025 in. (0.6 mm) depth-gauge jointer.
GUIDE-BAR MAINTENANCE
When the guide bar shows signs of wear,
reverse 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 normal 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.
•
The guide bar has a sprocket at its tip. The sprocket must be lubricated weekly with a grease
syringe to extend the guide-bar life. Use a grease syringe to lubricate weekly with chain oil by
means of the lubricating hole (Fig. 17). Turn the guide bar and check that the lubrication holes
and chain groove are free from impurities.
Fig . 15
Depth Gauge Clearance
Fig . 16
Depth Gauge
Jointer
Fig . 17
0.025" (0.6 mm)
Flat File
Lubricating hole
Sprocket in
guide bar tip
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