Dolby Laboratories STS75E Home Theater System User Manual

Chain Saw
Safety Instructions
Safety precautions for chain saw operators
Additional safety precautions
While operating the chain saw please observe the
following rules:
Contact of the guide bar nose with any object
should be avoided.
Tip contact may cause the guide bar to move
suddenly upward and backward, which may
cause serious or fatal injury.
Always operate the chain saw with both hands.
The following additional safety precautions should be
observed by all users of chain saws:
1. Do not operate a chain saw when you are fatigued.
Read and follow all safety precautions in the owner’s
manual. Failure to follow instructions could result
in serious injury.
This chain saw is capable of severe kickback that
could result in serious injury to the operator. Do not
operate this chain saw unless you have
extraordinary cutting needs and experience in and
special training for dealing with kickback. Chain
saws with significantly reduced kickback potential
are available.
Kickback may occur when the nose or tip of the
guide bar touches an object, or when the wood
closes in and pinches the saw chain in the cut. This
contact may abruptly stop the saw chain and in
some cases may cause a lightning fast reverse
reaction, kicking the guide bar up and back towards
the user, or push the guide bar back towards the
operator. Kickback may cause you to lose control
of the saw.
As a chain saw user, you can take several steps to
reduce the risk of a kickback and potential injury.
A. With a basic understanding of kickback, you
can reduce or eliminate the element of surprise.
It is a sudden surprise that contributes to
B. Keep a good firm grip on the saw with both
hands, your right hand on the rear grip and
your left hand on the tubular handle, when the
engine is running. Use a firm grip with thumbs
and fingers encircling the chain saw handles.
A firm grip can neutralize kickback and help
you maintain control of the saw. Don’t let go!
C. Make sure that the area in which you are
cutting is free from obstructions. Do not let the
nose of the guide bar contact the log, branch,
or any other obstructions which could be hit
while you are operating the saw.
D. Do not overreach or cut above shoulder height.
E. Follow manufacturer’s sharpening and maintenance instructions for the saw chain.
F. Only use replacement bars and chains specified by the manufacturer or the equivalent.
2. Use safety footwear; snug-fitting clothing;
protective gloves; and eye, hearing, and head
protection devices.
3. Use caution when handling fuel. Move the chain
saw at least 10 feet (3 m) from the fueling point
before starting the engine.
4. Do not allow other persons to be near the chain
saw when starting or cutting with the chain saw.
Keep bystanders and animals out of the work
5. Do not start cutting until you have a clear work
area, secure footing, and a planned retreat path
from the falling tree.
6. Keep all parts of your body away from the saw
chain when the engine is running.
7. Before you start the engine, make sure that the
saw chain is not contacting anything.
8. Carry the chain saw with the engine stopped, the
guide bar and saw chain to the rear, and the
muffler away from your body.
9. Do not operate a chain saw that is damaged, is
improperly adjusted, or is not completely and
securely assembled. Be sure that the saw chain
stops moving when the throttle control trigger is
10. Shut off the engine before setting it down.
11. Use extreme caution when cutting small size
brush and saplings because slender material may
catch the saw chain and be whipped toward y o u
or pull you off balance.
12. When cutting a limb that is under tension be alert
for springback so that you will not be struck when
the tension on the wood fibers is released.
13. Keep the handles dry, clean, and free of oil or fuel
14. Operate the chain saw only in well-ventilated
15. Do not operate a chain saw in a tree unless you
have been specifically trained to do so.
16. All chain saw service, other than the items listed
in the owner’s manual maintenance instructions,
should be performed by MAKITA . (For example,
if improper tools are used to remove the flywheel
or if an improper tool is used to hold the flywheel
in order to remove the clutch structural damage to
the flywheel could occur and could subsequently
cause the flywheel to burst.)
17. When transporting your chain saw, use the chain
protection cover.
18. Low kickback bars and low kickback chains are
designed to reduce the risk of kickback injury.
Ask your MAKITA dealer about these devices.
General Safety Precautions
max. CKA 45O
The use of any chain saw may be hazardous. At full
throttle chain speed can reach 45 mph (20 m/s). It is
important that you read; fully understand and observe
the following safety precautions and warnings. Read
the owner’s manual and the safety instructions
Maximum Computed Kickback Angle
(CKA)* without using the chain brake when
using the recommended bar and chain
combinations (In this example the CKA is 45°).
max. CKA 40O
MaximumComputed Kickback Angle
(CKA)* with using the chain brake when
using the recommended bar and chain
combinations (In this example the CKA is 40°).
Reactive forces, including kickback, can be dangerous. Careless or improper use of any chain saw
may cause serious or fatal injury.
Contact of the guide bar tip with
any object should be avoided!
Tip contact may cause the guide
bar to move suddenly upward
and backward, which may cause
serious injury!
Have your DOLMAR dealer show you how to
operate your chain saw. Observe all applicable
local safety regulations, standards and ordinances.
Always use two hands when
operating the chain saw!
Reduced Kickback Bar and
Chain combination that has been
evaluated with the power head
to achieve kickback protection
(according to ANSI and CSA
* The Computed Kickback Angle is a calculated value
from energies measured on a test bench.It is not the
angle of the guide bar moved upward in case of a
The operator
Minors should never be allowed to use a chain saw.
Bystanders, especially children and animals should
not be allowed in the area where a chain saw is in
use (fig. 1).
Never let the saw run unattended.
Store it in a locked place away from children. Fill
the fuel tank to 7/8 th full (see storing the saw).
Do not lend your chain saw without this owner’s
manual. Be sure that anyone using your saw understands the information given.
Physical Condition
You must be in good physical condition and mental
health and not under the influence of any substance
(drugs, alcohol), which might impair vision, dexterity
or judgment.
Proper use of a chain saw involves
1. the operator
2. the saw
3. the use of the saw.
Discription of symbols used on chain
Z 62.1-95 and
Z 62.3-96
Class 1A
Compliance with
CSA -Standards
ANSI B175.1-1991
Compliance with
ANSI -Standards
Chain Saw listed in accordance with
American National Standard Safety
Specifications for Gasoline Powered
Chain Saws (ANSI B 175.1-1991).
Prolonged use of chain saws exposing the operator
to vibrations may produce Whitefinger disease
(Raynaud’s phenomenon). This phenomenon
reduces the hand’s ability to feel and regulate
temperature, produces numbness and burning
sensations and may cause nerve and circulation
damage and tissue necrosis.
All MAKITA saws are therefore provided with an
antivibration system which is essential for those
using chain saws on a regular or sustained basis.
Antivibration systems do not guarantee that you will
not sustain Whitefinger disesase, however, they
reduce this danger considerably. Nevertheless,
continual and regular users should observe their
hands and fingers and in case of any abnormal
symptoms, seek medical advice immediately.
Proper clothing
The saw
Clothing must be sturdy and snug-fitting, but allow
complete freedom of movement. Avoid loose-fitting
jackets, scarfs, neckties, jewelry, flared or cuffed pants,
or anything that could become entangled with the saw
or brush. Wear overalls or jeans with a reinforced
cutting resistant insert (fig. 3).
Parts of the chain saw: illustrations and description of
parts see page 16.
Protect your hands with gloves when handling saw
and saw chain. Heavy-duty, nonslip gloves improve
your grip and protect your hands.
Never modify a chain saw in any way. Only
attachments supplied by MAKITA or expressly
approved by MAKITA for use with the specific saw
are authorized.
Bow guide bars substantially increase the potential
for kickback and severe or fatal injury due to the
greater kickback zone of the bow design. Bow
guide bars are not recommended for use on
MAKITA chain saws nor are they approved by the
ANSI B 175.1-1991 chain saw safety standard.
The use of the saw
Transporting the chain saw
Always stop the engine before putting a chain saw
down or carrying it. Carrying a chain saw with the
engine running is extremely dangerous. Accidental
acceleration of the engine can cause the chain to
Avoid touching the hot muffler.
Good footing is most important in chain saw work.
Wear sturdy boots with nonslip soles. Steel-toed safety
boots are recommended.
Proper eye protection is a must. Non-fogging, vented
goggles and a face screen is recommended. Their use
reduces the risk of eye and facial injury.
Wear an approved safety hard hat to protect your
head. Chain saw noise may damage your hearing.
Always wear noise protection equipment (ear plugs or
ear muffs) to protect your hearing.
Continual and regular users should have their hearing
checked regularly.
Wear protective helmet,
eye and ear protection
By hand: When carrying your saw by hand, the
engine must be stopped and the saw must be in the
proper position.
The chain protection cover should be over the
chain and the guide bar must point backwards.
When carrying your saw the bar should be behind
you (fig. 4).
By vehicle: When transporting in a vehicle, keep
chain and bar covered with the chain guard.
Properly secure your saw to prevent turnover, fuel
spillage and damage to the saw. Make sure the
saw is not exposed to heat or sparks.
Chain saw operating instructions
For assembly follow the procedure in the appropriate
section "Mounting Guide Bar and Chain" of this manual.
MAKITA chain, guide bar and sprocket must match
each other (see the appropriate section in this manual).
Proper tension of the chain is extremely important.
In order to avoid false setting the tensioning
procedure must be followed as described in this
manual. Always make sure the hexagonal nut(s)
for the sprocket guard is (are) tightened securely
after tensioning the chain. Check chain tension
once more after having tightened the nuts and
thereafter at regular intervals (always before starting
to work). If the chain becomes loose while cutting,
shut off the engine and then tighten. Never try to
tighten the chain while the engine is running!
Wipe off any spilled fuel before starting your saw and
check for leakage.
Check for fuel leakage while refueling and during
operation. If fuel or oil leakage is found, do not start or
run the engine until leak is fixed and spilled fuel has
been wiped away. Clothing with fuel on it has to be
changed immediately (this is a danger to your life!).
Avoid skin contact with fuel. Never loosen or remove
the cap of the fuel tank while the engine is running.
Do not drop start. This method is very dangerous because you may lose control of the saw (fig. 6).
Your MAKITA saw uses on oil-gasoline mixture for fuel
(see chapter "Fuel" of this manual).
Gasoline is an extremely flammable fuel. Use
extreme caution when handling gasoline or fuel
mix. Do not smoke or bring any sparks or flame
near the fuel (fig. 5).
Fueling instructions
Fuel your chain saw in well ventilated areas or outdoors. Always shut off the engine and allow it to cool
before refueling. Select bare ground for fueling and
move the chain saw at least 10 feet (3 m) from fueling
spot before starting the engine (fig. 5a).
10 feet
Place the chain saw on firm ground or other solid
surface in an open area. Maintain a good balance and
secure footing. Place your right foot through the rear
handle opening and firmly grasp the front handle with
your left hand (fig. 6a).
Be absolutely sure that guide bar and chain are clear
of you or all other obstructions and objects, including
the ground, because when the engine starts in semithrottle position, engine speed will be fast enough for
the clutch to engage the sprocket and turn the chain
which may cause a kickback.
Never attempt to start the saw when the guide bar is in
a cut or kerf.
When you pull the starter grip, don’t wrap the starter
rope around your hands. Do not allow the grip to snap
back, but guide the starter rope slowly back to permit
the rope to rewind properly. Failure to follow this
procedure may result in injury to hand or fingers and
may damage the starter mechanism.