Oregon Chainsaw 73701540 PCS3840 2006 06 20 Operators Manual

10MM10EN5. Operating the Engine
2. Holding the chain saw horizontally, release
your hand from the front handle, hit the tip of
the guide bar to a stump or a piece of wood,
and confirm brake operation. Operating level
varies by bar size.
In case the brake is not effective, ask our dealer
for inspection and repairs.
If the engine keeps rotating at high speed with
the brake engaged, the clutch will overheat
causing trouble.
When the brake engages during operation,
immediately release the throttle lever to...

11EN6. Sawing
•Before proceeding to
your job, read the sec-
tion “For Safe Oper-
ation”. It is recommend-
ed to first practice saw-
ing easy logs. This also
helps you get accus-
tomed to your unit.
•Always follow the safety
regulations. The chain
saw must only be used
for cutting wood. It is
forbidden to cut other
types of material.
Vibrations and kickback
vary with different mate-
rials and the require-
ments of the safety reg-
ulations would not be
respected. Do not use
the chain saw as a lever
for...

12MM12EN6. Sawing
3. Make a notch cut one-third of the way into
the tree on the felling side.
4. Make a felling cut from the opposite side of
the notch and at a level slightly higher than
the bottom of the notch.
When you fell a tree, be
sure to warn neighboring workers of the dan-
ger.
Bucking and Limbing
•Always ensure your foothold. Do not stand
on the log.
•Be alert to the rolling over of a cut log.
Especially when working on a slope, stand
on the uphill side of the log.
•Follow the instructions in...

13EN7. Maintenance
Before cleaning, the
inspecting or repairing the unit, make sure
that engine has stopped and is cool.
Disconnect the spark plug to prevent acci-
dental starting.
•MAINTENANCE AFTER EACH USE
1. Air filter
Loosen the knob and remove the air cleaner
cover. 
Take off the filter element and brush off attached
sawdust. When the filter is clogged with dust,
separate it in halves and shake-wash with gaso-
line.
When using compressed air, blow from the
inside.
To assemble the cleaner halves,...

14MM14EN7. Maintenance
2. Fuel filter
1. Using a wire hook, take out the filter from the
filler port.
2. Disassemble the filter and wash with gaso-
line, or replace with a new one if needed.
•After removing the filter, use a pinch to hold
the end of the suction pipe.
•When assembling the filter, take care not to
allow filter fibers or dust inside the suction
pipe.
3. Spark plug
Clean the electrodes with a wire brush and reset
the gap to 0.65 mm as necessary.
4. Sprocket
Check for cracks and for excessive...

15EN8. Maintenance of Saw Chain and Guide Bar
1. Saw Chain
It is very important for
smooth and safe operation to always keep
the cutters sharp.
The cutters need to be sharpened when:
•Sawdust becomes powder-like.
•You need extra force to saw in.
•The cut path does not go straight.
•Vibration increases.
•Fuel consumption increases.
Cutter setting standards
Be sure to wear safety
gloves.
Before filing:
•Make sure the saw chain is held securely.
•Make sure the engine is stopped.
•Use a round file of proper...

16MM16EN8. Maintenance of Saw Chain and Guide Bar / 9. Troubleshooting Guide
9. Troubleshooting Guide
PROBLEME CAUSE REMEDY
1)
Starting failure
WARNING
Make sure the
icing prevention
system is not
working.
2)
Lack of
power/Poor accel-
eration/Rough
idling
3)Oil does not
come out–Check fuel for water or substandard
mixture. 
–Check for engine flooding.
–Check spark ignition. 
–Check fuel for water or substandard
mixture. 
–Check air filter and fuel filter for
clogging. 
–Check carburetor for inadequate...

1FR1. Pour la sécurité 
Cher Client,
Nous désirons avant tout vous remercier de la préférence que vous avez accordée à nos produits et nous espé-
rons que l’utilisation de cette machine vous réservera de grandes satisfactions et répondra pleinement à votre
attente. Ce manuel a été rédigé pour vous permettre de bien connaître votre machine et de l’utiliser dans les
meilleures conditions de sécurité et d’efficacité; n’oubliez pas qu’il est partie intégrante de la machine, gardez-le
à portée de la main pour...

2MM2FR
1.Ne jamais utiliser une tronçonneuse
lorsqu’on est fatigué, malade, énervé,
sous l’influence de médicaments
entraînant vertige ou somnolence, ou
encore sous l’influence de l’alcool ou
de drogues.
2.Porter des chaussures de sécurité,
des vêtements moulants, des lunettes
de protection, un casque de sécurité
et un casque anti-bruit. Utiliser les
gants anti-vibrations.
3.Maintenir la chaîne de scie bien
tendue et la scie, y compris le systè-
me AV, bien entretenue. Une chaîne
lâche augmente le temps...

3FR
(En particulier, toute tentative de
démontage du volant ou de l’em-
brayage sans disposer des outils
appropriés risque de fissurer le volant
qui pourrait ensuite se désintégrer en
marche).
16.Toujours arrêter le moteur avant
de poser la tronçonneuse.
17.Observer la plus grande prudence
en coupant les broussailles. Une liane
ou un arbrisseau se prenant dans la
chaîne risquent de faire perdre l’équi-
libre ou de cingler le visage.
18.Lorsqu’on coupe une branche en
flexion, prendre garde à la détente...