4. Taking hold of the bar, rotate the chain
tensioning mechanism anti-clockwise
as far as possible.
5. Position the chain over the bar, starting at
the nose
, fitting it into the guide bar
groove.
6. Ensure that the sharp side of the cutting teeth face in a forward
direction
on the upper part of the bar.(see markings on the bar)
7. Mount the bar on the bar retaining
screw
, ensuring that the stud
has located in the slot on the rear of
the guide bar. Position the chain
directly over the drive sprocket
.
Check that the chain fits correctly
on the bar and rotate the chain
tensioning mechanism
clockwise
to pre-tension the chain.
8. Replace the drive sprocket cover
and turn the bar retaining inner
knob in a clockwise
direction
until loosely tightened (7-8 turns).
9. To tension the chain, turn the
chain tensioner outer knob in a
clockwise direction
. Tension the
chain until the tension is correct.
10.To check the tension, pull the chain away from the bar
and
ensure gap measures approx 2-3mm. To reduce tension turn in an
anti-clockwise direction
. (when performing this operation, keep
the bar nose raised upwards)
11. When the tension is correct turn the bar retaining inner knob in a
clockwise direction
until securely tightened and flip back into
position to secure
.
12.Finally, check that the chain, bar and drive sprocket cover fit
correctly and the chain is correctly tensioned.
22
18
18
21
20
19
17
16
15
14
13
11
12
18
GB
19
21
11
13
22
Tensioning the chain too tightly will overload the motor and cause
damage. Insufficient tension can provoke chain derailing, whereas a
chain tightened correctly provides the best cutting characteristics and
prolonged work life. Check the tension regularly because the chain
length tends to stretch with use (especially when the chain is new;
after the first assembly, the chain tension must be checked after a few
minutes machine operation); in any case do not tighten the chain im-
mediately after use, but wait until it cools down.
Warning:- The chain and guide bar can become very hot
21
16
17
20
14
15
12
