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Makita DUC254C Manual

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15 ENGLISH
Removing or installing saw chain
CAUTION: The saw chain and the guide bar
are still hot just after the operation. Let them cool
down enough before carrying out any work on
the tool.
CAUTION: Carry out the procedure of install-
ing or removing saw chain in a clean place free
from sawdust and the like.
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.
►Fig.9: 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.
Toinstallthesawchain,performthefollowingsteps:
1. Check the direction of the saw chain. Match the
direction of the saw chain with that of the mark on the
chain saw body.
2. Fit one end of the saw chain on the top of the
guide bar.
3. Fit the other end of the saw chain around the
sprocket, then attach the guide bar to the chain saw
body, aligning the hole on the guide bar with the pin on
the chain saw body.
►Fig.10: 1. Sprocket 2. Hole
4. Insert the protrusion on the sprocket cover to the
chain saw body, and then close the cover so that the
bolt and pins on the chain saw body meet their counter-
parts on the cover.
►Fig.11: 1. Protrusion 2. Sprocket cover 3. Bolt 4. Pin
5. Tightentheretainingnuttosecurethesprocket
cover,thenloosenitabitfortensionadjustment.
►Fig.12: 1. Retaining nut
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, wear of the guide bar
andbreakageoftheadjustingdial.
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.
►Fig.13: 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tsintheguidebarrailasillustrated.
►Fig.14: 1. Guide bar 2. Saw chain 3.Chainadjust-
ing 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.
►Fig.15: 1. Retaining nut
Makesurethesawchaintssnuglyagainstthelower
side of the bar.
Spike bumper
Optional accessory
When cutting thick branches, using the spike bumper is
recommended.Toinstallthespikebumper,performthe
following steps:
1. Remove the sprocket cover, saw chain, and guide
bar.
2. Align the holes of the spike bumper with the holes
on the chain saw body, and then tighten the screws
rmly.
►Fig.16: 1. Screw 2. Spike bumper
OPERATION
Lubrication
Saw chain is automatically lubricated when the tool is in
operation. Check the amount of remaining oil in the oil
tank periodically through the oil inspection window.
Torellthetank,laythechainsawonitssideand
removetheoiltankcap.Theproperamountofoilis140
ml.Afterrellingthetank,makesurethattheoiltank
cap is tightened securely.
►Fig.17: 1. Oil tank cap 2. Oil inspection window
Afterrelling,holdthechainsawawayfromthe
tree. Start it and wait until lubrication on saw chain is
adequate.
►Fig.18
… 15 …


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