-- 6 --
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
glove swhen handling saw chain or making
saw chain adjustments.
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. 5 for information
concerning correct cold tension (A),
correct warm tension (B), and as a guide for
when saw chain needs adjustment (C).
9. Guide the drive links into the groove (I)
and around the end of the bar. (Fig.3E)
NOTE:
The saw chain may droop slightly on
the lower part of bar. This is normal.
10. Turn the knob (J) COUNTERCLOCK-
WISE until the TANG (K) is to the end of
its travel. (Fig. 3F)
11. Install the clutch cover making sure the
tang is positioned in the lower hole in the
guide bar. Make sure the chain does not
slip off of the bar.
12. Lock the screw (N) be tight, and follow
step 13 to adjust the chain tension.
13. Turn the tension ring clockwise tight (M);
pull the control button by arrow direction
(L) to turn tightly be clockwise then push
the control button back. (Fig.3G)
NOTE:
The guide bar retaining knob is
installed only hand tight at this point
because saw chain adjustment is required.
Follow instructions in Section, Saw Chain
Tension Adjustment.
1. Hold nose of guide bar up and turn
adjustment chain ring (A) CLOCKWISE
to increase chain tension. Turning chain
ring (A) COUNTERCLOCKWISE will
decrease amount of tension on chain.
Ensure the chain fits snugly all the way
around the guide bar. (Fig. 4)
2. After making adjustment, and while still
holding nose of bar in the uppermost
position, tighten the bar retaining
button (B) securely. Chain has proper
tension when it has a snug fit all around
and can be pulled around by gloved
hand. (Fig. 4)
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:
A. Loosen the bar retaining knob so they
are finger tight. Decrease tension by
turning the bar adjustment chain ring
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 chain ring CLOCKWISE.
B. When saw chain has proper tension,
hold nose of bar in the uppermost
position and tighten the bar retaining
knob securely.
SAW CHAIN TENSION ADJUSTMENT
TO ADJUST SAW CHAIN:
Fig. 5
A
B
C
Fig. 4
A
B
Fig. 3A
C
Fig. 3B
B
Fig. 3C
F
Fig. 3D
A
D
E
Fig. 3E
J
I
G
H
Fig. 3G
Fig. 3F
K
L
M
N
