14 ENGLISH
After installing the saw chain, adjust the saw chain
tension by referring to the section for adjusting saw
chain tension.
Removing the saw chain
To remove the saw chain, perform the following steps:
1.
Release the chain brake by pulling the front hand
guard.
2.
Loosen the chain adjusting screw, then the retain
-
ing nut.
1
2
Fig.15
►
1.
Chain adjusting screw
2.
Retaining nut
3.
Remove the sprocket cover then remove the saw
chain and guide bar from the chain saw body.
Adjusting saw chain tension
CAUTION:
Do not tighten the saw chain too
much.
Excessively high tension of saw chain may
cause breakage of saw chain and wear of the guide
bar.
CAUTION:
A chain which is too loose can
jump off the bar and it may cause an injury
accident.
The saw chain may become loose after many hours
of use. From time to time check the saw chain tension
before use.
1.
Release the chain brake by pulling the front hand
guard.
2.
Loosen the retaining nut a bit to loosen the
sprocket cover lightly.
1
Fig.16
►
1.
Retaining nut
3.
Lift up the guide bar tip slightly and adjust the
chain tension. Turn the chain adjusting screw clockwise
to tighten, turn it counterclockwise to loosen.
For chain blade 90PX and 91PX:
Tighten the saw chain until the lower side of the saw
chain fits in the guide bar rail as illustrated.
3
2
1
Fig.17
►
1.
Guide bar
2.
Saw chain
3.
Chain adjusting screw
For chain blade 25AP:
Tighten the saw chain so that the gap between the cen-
ter of the lower side of the guide bar and the saw chain
becomes approximately 1 mm to 2 mm.
4.
Keep holding the guide bar lightly and tighten the
sprocket cover.
For chain blade 90PX and 91PX:
Make sure that the saw chain does not loose at the
lower side.
For chain blade 25AP:
Make sure that the gap between the center of the lower
side of the guide bar and the saw chain is approximately
1 mm to 2 mm.
5.
Tighten the retaining nut to secure the sprocket
cover.
1
Fig.18
►
1.
Retaining nut
