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34
ADJUSTING THE CHAIN TENSION
Check the chain tension before and during operation. The saw chain will expand as it heats up during
operation. Adjust the chain tension whenever the ats on the saw chain hang out of the bar groove
(Fig. 18 & Fig. 21).
NOTE: A new saw chain tends to stretch and will need readjustment after as few as ve (5) cuts. This is
normal during the break-in period. The interval between future adjustments will lengthen quickly.
1. Loosen the bar-retaining nuts, but do not remove them (Fig. 15).
2. Hold the guide bar tip up (Fig. 19) and use a at-head screwdriver to turn the chain-tensioning
screw (Fig. 20).
• Turn the chain-tensioning screw clockwise to tighten the saw chain.
• Turn the chain-tensioning screw counterclockwise to loosen the saw chain.
The saw chain should t snuggly against the underside of the guide bar. There should be no sag (Fig. 21).
3. Continue to hold the guide bar tip up. Tighten the bar-retaining nuts securely.
4. Move the saw chain back and forth on the guide bar. If the saw chain does not move freely, loosen
the chain tension.
CAUTION: The guide bar, saw chain, and saw bearings will wear more rapidly if the
saw chain is not properly tensioned. Maintaining proper chain tension will improve cutting
performance and prolong the life of the saw chain.
WARNING: To prevent serious injury, never touch the saw chain or adjust the chain
tension while the unit is running. Always stop the engine and allow it to cool. Disconnect
the spark plug wire to prevent the unit from starting accidentally.
WARNING: The saw chain is very sharp. Always wear heavy-duty protective gloves
when handling or performing maintenance on the saw chain.
CAUTION: If the saw chain was tensioned while warm, it may become too tight when
cooled. Loosen the chain tension after operation and check the chain tension before the
next use.
Fig. 18
Flats
Drive Links Guide Bar
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