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SAW CHAIN REPLACEMENT/INSTALLATION
WARNING:
Whenever handling the saw chain,
always wear work gloves for protection against sharp
cutting edges.
1.
Using a straight screwdriver turn tension adjustment screw
counterclockwise (Fig. 8, A) 4 turns.
2.
Remove the bar retaining nuts and screw. Then take off the
chain guard (Fig. 8, B).
A
Tension
Adjustment
Screw
3.
Take off the chain and bar.
4.
Prepare new chain and/or bar, and fit the chain into the groove
in the bar.
5.
Loop the saw chain over the drive sprocket with the cutting
edges of the chain pointing in the direction of rotation (Fig. 9).
6.
Adjust the tension adjustment screw (Fig. 8, A) to allow
insertion of the bar (Fig. 10). Make sure the chain follows the
slot in the guide bar and adjust the tension adjustment screw
to make the chain fit snugly on the underside of the bar.
7.
Install the chain guard and tighten bar retaining nuts and
screw (Fig. 8, B).
MAINTENANCE AND REPAIR INSTRUCTIONS
B
Chain
Guard
Screw
Bar Retaining Nuts
Fig. 8
Fig. 9
Fig. 10
SAW CHAIN TENSION ADJUSTMENT
Proper tension of the 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.
NOTE: A new chain and bar will need readjustment after as few
as 5 cuts. This is normal during the break-in period, and
the interval between future adjustments will lengthen
quickly (Fig. 11).
CAUTION:
If a chain is too loose or too tight, the
bar chain and saw bearings will wear more rapidly.
Refer to Figure 11 for information concerning correct
cold tension (A), correct warm tension (B), and a chain
in need of adjustment (C).
A
To adjust the saw chain tension:
1.
Loosen the bar retaining nuts so they are hand tight (Fig. 8, B).
2.
Holding the nose of the bar up, use the screwdriver to turn the
guide bar adjustment screw clockwise to tighten the chain
(Fig. 8, A). Turning the screw counterclockwise loosens the
chain on the guide bar.
3.
While wearing heavy duty work gloves (after you've made the
adjustment), move the saw chain back and forth on the guide
bar to be sure the chain moves freely and is in proper mesh
with the sprocket. Never move the chain with your bare hands.
NOTE: If the chain is difficult to rotate or if it binds on the guide
bar, there is too much tension applied and it must be
adjusted. To decrease tension, turn the adjustment screw
counterclockwise, slowly. Move the chain back and forth
until it moves freely.
4.
Holding the nose in upper position, securely tighten the bar
retaining nuts.
B
C
Fig. 11
9
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