POWPG20130 EN
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Note: the guide bar retaining nuts are installed only hand tight at this point
because saw chain adjustment is required. Follow instructions in section
saw chain tension adjustment.
7.3.3 Saw chain tension adjustment
Proper tension of saw chain is extremely important and must be checked before starting, as well
as during any cutting operation.
Taking the time to make needed adjustments to the saw chain will result in improved cutting
performance and prolonged chain life.
Warning: always wear heavy duty gloves when handling saw chain or making
saw chain adjustments.
7.3.4 To adjust saw chain:
▪ Hold nose of guide bar up and turn adjustment screw (16) clockwise to increase chain
tension. Turning screw counterclockwise will decrease amount of tension on chain. Ensure
the chain fits snugly all the way around the guide bar. (fig 5)
▪ After making adjustment, and while still holding nose of bar in the uppermost position,
tighten the bar retaining nuts securely. Chain has proper tension when it has a snug fit all
around and can be pulled around by gloved hand.
Note: if chain is difficult to rotate on guide bar or if it binds, too much tension
has been applied. This requires minor adjustment as follows:
▪ Loosen the bar retaining nuts so they are finger tight. Decrease tension by turning the bar
adjustment screw counterclockwise slowly. Move chain back and forth on bar. Continue to
adjust until chain rotates freely, but fits snugly. Increase tension by turning bar adjustment
screw clockwise.
▪ When saw chain has proper tension, hold nose of bar in the uppermost position and
tighten the 2 bar retaining nuts securely.
Caution: a new saw chain stretches, requiring adjustment after as few as 5
cuts. This is normal with a new chain, and the interval between future
adjustments will lengthen quickly.
Caution: if saw chain is too loose or too tight, the sprocket, bar, chain, and
crankshaft bearings will wear more rapidly. Study Fig.6 for information
concerning correct cold tension (A), correct warm tension (B), and as a guide
for when saw chain needs adjustment (C).
7.3.5 Chain brake mechanical test
Your chain saw is equipped with a chain brake that reduces possibility of injury due to kickback.
The brake is activated if pressure is applied against brake lever when, as in the event of kickback,
operator’s hand strikes the lever. When the brake is actuated, chain movement stops abruptly.
