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100647 - ChAiNSAw
3. Frequently check the guide bar for damage (Fig. 39).
Feathering and burring of the guide bar rails (the ridges on
either side of the bar groove) is a normal process of guide
bar wear. Such faults should be smoothed with a file as soon
as they occur (Fig. 39). A guide bar with the following faults
should be replaced:
3a. Wear inside the guide bar rails that permits the chain to
lay sideways
3b. Bent guide bar
3c. Cracked or broken rails
3d. Spread rails
Refer to Replacing the Guide Bar and Saw Chain.
Lubricating the Guide bar Sprocket Tip
The guide bar sprocket tip was lubricated at the factory, but
requires regular lubrication. Failure to lubricate the guide bar
sprocket tip will result in poor performance, damage to the unit
and will VOID the warranty.
This procedure can be performed while the guide bar and saw
chain are still assembled on the unit.
1. Clean the guide bar sprocket tip thoroughly with a damp cloth
(Fig. 40).
2. Use a guide bar tip lube gun (not included) to inject grease
into the lubrication hole (Fig. 40). Inject grease until it
appears on the outer edge of the guide bar sprocket tip.
3. Rotate the saw chain by hand. Always wear heavy-duty
protective gloves. Make sure the chain brake is disengaged.
4. Repeat the lubrication process until the entire guide bar
sprocket tip is lubricated.
Guide bar groove
NOTiCE
Oil passage
Figure 37
Flat file
Bur
Lubrication hole
Guide bar tip lube gun
Replacing the Guide bar and Saw Chain
Always use a low-kickback saw chain, which significantly
reduces the danger of kickback. Low-kickback saw chain does
not completely eliminate kickback. A low-kickback or "safety
chain," should never be regarded as total protection against
injury.
When replacing the guide bar and saw chain, only use the
replacement parts specified by the manufacturer or their
equivalents. Refer to Replacement Parts. Use of any unauthorized
parts or accessories could lead to serious injury to the operator or
damage to the unit and will VOID the warranty.
Always use a replacement saw chain designated as "low-
kickback"or a saw chain that meets the low-kickback
performance requirements. A standard saw chain (a chain that
does not have the kickback-reducing guard links) should only be
used by an experienced professional chain saw operator.
MAiNTENANCE
Chain oil discharge hole
Figure 38
Uneven wear
Spread rails
Figure 39
Guide bar sprocket tip
Figure 40
wARNiNG
27
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