Dolmar PS-45 User Manual
Owner’s and Safety Manual
for Gasoline Chain Saws (page 2 - 34)
Manuel d’emploi et de sécurité
de tronçonneuses thermiques (page 35 - 67)
WARNING!
Read and understand this Manual. Always follow safety precautions in the Owner’s and Safety Manual.
Improper use can cause serious injury!
The engine exhaust from this product contains chemicals known to the State of California to cause
cancer, birth defects or other reproductive harm. Preserve this Manual carefully!
ATTENTION!
Suivez toujours les conseils de sécurité du présent manuel d’emploi et de sécurité. Une utilisation
incorrecte de la tronçonneuse peut entraîner des blessures graves! Conservez avec soin ce manuel!
Les gaz d’échappement émis par ce produit contiennent des produits chimiques connus par l’Etat de
Californie pour provoquer le cancer, des défauts de naissance ou autres dommages de reproduction.
Lisez et comprenez ce manuel.
PS-34
PS-45
1
2
EMISSIONS COMPONENT DEFECT WARRANTY COVERAGE
DOLMAR warrant to the initial retail purchaser and each subsequent owner, that this utility equipment was designed, built, and
equipped to conform at the time of initial sale to all applicable regulations of the U.S. Environmental Protection Agency (EPA), and
that the engine is free of defects in materials and workmanship which would cause this engine to fail to conform with EPA regulations
during its warranty period.
For the components listed under PARTS COVERED, the service dealer authorized by DOLMAR will, at no cost to you, make the
necessary diagnosis, repair, or replacement necessary to ensure that the engine complies with applicable U.S. EPA regulations.
EMISSION COMPONENT DEFECT WARRANTY PERIOD
The warranty period for this engine begins on the date of sale to the initial purchaser and continues for a period of 2 years.
PARTS COVERED
Listed below are the parts covered by the Emission Components Defect Warranty. Some of the parts listed below may require sche-
duled maintenance and are warranted up to the rst scheduled replacement point for that part.
Fuel Metering System
Ignition System
Carburetor and internal parts Spark plug
Fuel lter, if applicable
Flywheel Magneto
Throttle stopper, if applicable Ignition Coil
Choke System, if applicable
Air Induction System Miscellaneous Items Used in Above Systems
Pre lter, if exist Fuel hoses, clamps and sealing gaskets
Air lter, Air lter case, Intake manifold
OBTAINING WARRANTY SERVICE
To obtain warranty service, take your engine to the nearest DOLMAR service Center authorized by DOLMAR. Bring your sales receipts indicating date of purchase for this engine. The dealer of service authorized by DOLMAR will perform the necessary repairs or
adjustments within a reasonable amount of time and furnish you with a copy of the repair order. All parts and accessories replaced
under this warranty become the property of DOLMAR.
WHAT IS NOT COVERED
• Conditions resulting from tampering, misuse, improper adjustment (unless they were made by the service dealer authorized by
DOLMAR during a warranty repair), alteration, accident, failure to use the recommended fuel and oil, or not performing required
maintenance services.
• The replacement parts used for required maintenance services.
• Consequential damages such as loss of time, inconvenience, loss of use of the engine or equipment, etc.
• Diagnosis and inspection charges that do not result in warranty-eligible service being performed.
• Any non-authorized replacement part, or malfunction of authorized parts due to use of non-authorized parts.
OWNER’S WARRANTY RESPONSIBILITIES
As the engine owner, you are responsible for the performance of the required maintenance listed in your owner’s manual.
DOLMAR recommends that you retain all receipts covering maintenance on your engine, but DOLMAR cannot deny warranty solely
for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance. As the engine owner, you should
however be aware that DOLMAR may deny warranty coverage if your engine or a part has failed due to abuse, neglect, improper
maintenance or unapproved modications.
You are responsible for presenting your engine to the nearest service dealer authorized by DOLMAR when a problem exists.
If you have any questions regarding your warranty rights and responsibilities, you should contact the DOLMAR Warranty service
Department at 1-888-OPE-PART for the information.
THINGS YOU SHOULD KNOW ABOUT THE EMISSION CONTROL SYSTEM WARRANTY:
MAINTENANCE AND REPAIRS
You are responsible for the proper maintenance of the engine. You should keep all receipts and maintenance records covering the
performance of regular maintenance in the event questions arise. These receipts and maintenance records should be transferred to
each subsequent owner of the engine. DOLMAR reserves the right to deny warranty coverage if the engine has not been properly
maintained. Warranty claims will not be denied, however, solely because of the lack of required maintenance or failure to keep
maintenance records.
MAINTENANCE, REPLACEMENT OR REPAIR OF EMISSION CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED BY
ANY REPAIR ESTABLISHMENT OR INDIVIDUAL; HOWEVER, WARRANTY REPAIRS MUST BE PERFORMED BY A SERVICE
DEALER AUTHORIZED BY DOLMAR. THE USE OF PARTS THAT ARE NOT EQUIVALENT IN PERFORMANCE AND DURABILITY TO AUTHORIZED PARTS MAY IMPAIR THE EFFECTIVENESS OF THE EMISSION CONTROL SYSTEM AND MAY HAVE A
BEARING ON THE OUTCOME OF A WARRANTY CLAIM.
If other than the parts authorized by DOLMAR are used for maintenance replacements or for the repair of components affecting emission control, you should assure yourself that such parts are warranted by their manufacturer to be equivalent to the parts authorized
by DOLMAR in their performance and durability.
HOW TO MAKE A CLAIM
All repair qualifying under this limited warranty must be performed by a service dealer authorized by DOLMAR. In the event that any
emission-related part is found to be defective during the warranty period, you shall notify DOLMAR Warranty service Department at
1-888-OPE-PART and you will be advised of the appropriate warranty service dealer or service providers
where the warranty repair can be performed.
RE Y
WARNING !
Careless or improper use of this product can cause serious or even fatal injury.
Before operating a chain saw or other DOLMAR products it is important that you read, fully understand and
carefully follow the instructions outlined in this owners manual. Kickback may cause severe or fatal injury and
is one of many potential dangers in operating a chain saw. Kickback and other safety related precautions are
described in detail within this owners manual. Additional owners manuals are available from DOLMAR POWER
PRODUCTS, PO Box 5007, Alpharetta, GA, 30005-5007, USA, Telephone 1-888-OPE-PART.
This product complies with: American National Standard Institute B 175.1-1991 chain saw safety standard.
Canadian Standards Association Z62.1-95 chain saw safety standard.
Z62.3-96 chain saw kickback standard.
Society of Automotive Engineers SAEJ 335-Jun 95 „Multiposition small
engine exhaust system re ignition
suppression”
The Emissions Compliance Period referred to on the emission Compliance label indicates the number of operat-
ing hours for which the engine has been shown to meet federal emissions requirements. Category C= 50 hours,
B= 125 hours, and A= 300 hours.
With the purchase of this chain saw you have chosen a German quality product. Important instructions for the
assembly and operation of this saw are given in this manual. For your own safety, we ask you to read the accident prevention instructions very carefully before putting your chain saw into operation, as incorrect handling can,
despite all precautions, lead to accidents. With a little care and attention you will have good service and lasting
satisfaction from this rst-rate product. The following industrial property rights apply: DE 19722629.
DOLMAR PS-34, PS-45
Contents
Delivery inventory 4
Symbols 4
Safety precautions 5-16
Denomination of components 17
Technical data 18
Approved bar and chain combinations 18
Mounting the guide bar and saw chain 19-20
Checking the chain tension 21
Safety chain brake 21
Fuel / Refuelling 22-23
Checking the chain lubrication 24
Starting the engine 25
Stopping the engine 25
Checking the safety chain brake 26
Page
Contents
Page
Set idle speed 26
Sharpening the saw chain 27-28
Cleaning the brake band and sprocket 29
Cleaning the guide bar 29
Replacing the saw chain 30
Replacing the fuel lter 30
Cleaning the air lter 30
Replacing the spark plug 31
Replacing / cleaning the spark arrester screen 31
Instructions for periodic maintenance 32
Service, spare parts and guarantee 32-33
Troubleshooting 33
Extract from the spare parts list 34
The DOLMAR PS-34 and PS-45 will be delivered in a protective cardboard box to prevent transport damage. Card-
board is a basic raw material and is consequently reuseable or suitable for recycling (waste paper recycling).
3
4
Delivery inventory
RE Y
1
4
5
32
1. Chain saw
2. Guide bar
3. Saw chain
4. Chain protection cover
5. Assembly tool
6. Owner’s and Safety Manual (not shown)
In case one of the parts listed should not be included in the
delivery inventory, please consult your sales agent.
Symbols
You will notice the following symbols on the chain saw and in the Owner’s and Safety Manual:
Read Owner’s and Safety Manual
and follow the warning-
and safety precautions!
Particular care
and caution!
Forbidden!
Wear protective helmet,
eye and ear protection!
Wear protective gloves!
No smoking!
Stop engine!
Start the engine
Caution, kickback!
Chaine brake
Fuel and oil mixture
Chain oil ll
First aid
No open re!
Recycling
Combination switch
choke, Start/Stop (I/O)
Safety position
Direction of chain travel
Further
symbols
see page 7.
Safety precautions for chain saw operators
Additional safety precautions
While operating the chain saw please observe the
following rules:
a) Contact of the guide bar nose with any object
should be avoided.
b) Tip contact may cause the guide bar to move
suddenly upward and backward, which may
cause serious or fatal injury.
c) Always operate the chain saw with both hands.
WARNING!
Read and follow all safety precautions in the owner’s
manual. Failure to follow instructions could result in
serious injury. It is recommended to lend the chain
saw only to people who are experienced in working
with chain saws. Always hand over the Owner‘s and
Safety Manual.
WARNING!
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 signicant-
ly reduced kickback potential are available.
WARNING!
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
accidents.
B. Keep a good rm 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 rm grip with thumbs
and ngers encircling the chain saw handles. A
rm 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 mainten-
ance instructions for the saw chain.
F. Only use replacement bars and chains specied
by the manufacturer or the equivalent.
The following additional safety precautions must be
observed by all users of chain saws:
1. Do not operate a chain saw when you are fati
gued.
2. Use safety footwear; snug-tting clothing; protec
tive 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 area.
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 mufer
away from your body.
9. Do not operate a chain saw that is damaged, is im
properly adjusted, or is not completely and securely
assembled. Be sure that the saw chain stops moving
when the throttle control trigger is released.
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 you 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 bers is released.
13. Keep the handles dry, clean, and free of oil or fuel
mixture.
14. Operate the chain saw only in well-ventilated
areas.
15. Do not operate a chain saw in a tree unless you
have been specically 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 DOLMAR . (For example,
if improper tools are used to remove the ywheel
or if an improper tool is used to hold the ywheel
in order to remove the clutch structural damage to
the ywheel could occur and could subsequently
cause the ywheel 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 DOLMAR dealer about these devices.
-
-
-
5
6
General Safety Precautions
®
C US
LISTED
XXX.YYY.ZZZ
XXX.YYY.ZZZ
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 periodically.
WARNING !
Reactive forces, including kickback, can be dangerous. Careless or improper use of any chain saw
may cause serious or fatal injury.
Have your DOLMAR dealer show you how to operate your chain saw. Observe all applicable local
safety regulations, standards and ordinances.
1
Maximum Computed Kickback Angle
(CKA)* without using the chain brake when
using the recommended bar and chain
combinations (In this example the CKA is
21°).
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!
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
standards).
WARNING!
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 (g. 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 un-derstands the
information given.
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
saws:
CSA Z 62.1-95 and
Z 62.3-96
Class 1C
ANSI B175.1-1991
45M6 Chain Saw listed in accordance with
American National Standard Safety Speci-
cations for Gasoline Powered Chain Saws
(ANSI B 175.1-1991).
CSA Z 62.1-95 and Z 62.3-96, Class 1C
Compliance with
CSA -Standards
Compliance with
ANSI -Standard
* 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
KICKBACK.
The operator
Physical Condition
You must be in good physical condition and mental
health and not under the inuence of any substance
(drugs, alcohol), which might impair vision, dexterity
or judgment.
2
WARNING !
Prolonged use of chain saws exposing the operator
to vibrations may produce Whitenger disease (Ray-
naud’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 DOLMAR 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 Whitenger disesase, however, they
reduce this danger considerably. Nevertheless,
continual and regular users should observe their
hands and ngers and in case of any abnormal
symptoms, seek medical advice immediately.
Proper clothing
The saw
Clothing must be sturdy and snug-tting, but allow
complete freedom of movement. Avoid loose-tting
jackets, scarfs, neckties, jewelry, ared or cuffed pants,
or anything that could become entangled with the
saw or brush. Wear overalls or jeans with a reinforced
cutting resistant insert (g. 3).
Protect your hands with gloves when handling saw and
saw chain. Heavy-duty, nonslip gloves improve your grip
and protect your hands.
Parts of the chain saw: illustrations and description of
parts see page 17.
WARNING !
Never modify a chain saw in any way. Only attach-
ments supplied by DOLMAR or expressly approved by DOLMAR for use with the specic saw are
authorized.
WARNING !
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 DOLMAR
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
3
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.
WARNING!
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
rotate.
Avoid touching the hot mufer.
4
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
(g. 4).
Wear protective helmet,
eye and ear protection!
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.
7
8
Chain saw operating instructions
For assembly follow the procedure in the appropriate
section "Mounting Guide Bar and Chain" of this manual.
DOLMAR chain, guide bar and sprocket must match each
other (see the appropriate section in this manual).
WARNING!
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!
Fueling
Your DOLMAR saw uses on oil-gasoline mixture for fuel
(see chapter "Fuel" of this manual).
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 xed 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.
Starting
Do not drop start. This method is very dangerous be-
cause you may lose control of the saw (g. 6).
5
WARNING!
Gasoline is an extremely ammable fuel. Use extreme caution when handling gasoline or fuel mix.
Do not smoke or bring any sparks or ame near the
fuel (g. 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 (g. 5a).
6
6a
Place the chain saw on rm 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 rmly grasp the front handle with your left
hand (g. 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 semi-throttle
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
10 feet
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 ngers and may damage
the starter mechanism.
5a
Important adjustments
WARNING!
At correct idle speed, chain should not turn. For directions to adjust idle speed, see the appropriate
section of this instruction manual.
Do not use a saw with incorrect idle speed adjustment. Adjust the idle speed yourself according to
the appropriate section of this manual.
Have your DOLMAR dealer check your saw and
make proper adjustments or repairs.
Wrap your ngers tightly around the handles, keeping
the handles cradled between your thumb and forenger (g. 7). With your hands in this position, you can
best oppose and absorb the push, pull and kickback
forces of your saw without having it slip out of your
grip (see section of reactive forces). Make sure your
chain saw handle and grip are in good condition and
free of moisture, pitch, oil or grease.
Always start a cut with the chain running at full speed
and the spike bar in contact with the wood.
Check the saw chain tension frequently, especially
just after installing a new chain. New chains may
stretch more during their initial use. A properly adjusted saw chain can be pulled freely around the
guide bar by hand without sagging. Always stop the
engine and wear gloves when checking or adjusting
the chain tension.
Working conditions
Operate your chain saw only outdoors. Operate the saw
under good visibility and daylight conditions only.
WARNING!
Take extreme care in wet and freezing weather
(rain, snow, ice). Put off the work when the weather
is windy, stormy or rainfall is heavy. Clear the area
where you are working.
WARNING!
Avoid stumbling on obstacles such as stumps, roots
or rocks and watch out for holes or ditches. Be extremely cautious when working on slopes or uneven
ground. There is increased danger of slipping on
freshly debarked logs.
WARNING!
Never use the saw with one hand. You cannot
control reactive forces (see pages 10 to 12) and
may lose control of the saw.
8
WARNING!
Do not operate your chain saw in semi-throttle
position. Cutting in this position does not permit
the operator proper control of the saw or chain
speed.
WARNING!
Never come too close to a rotating chain with your
hands or body.
Cutting instructions
Always hold the saw rmly with both hands when the
engine is running. Place your left hand on the tubular
handle and your right hand on grip and throttle lever.
Left-handers should follow these instructions too.
7
WARNING!
Do not cut any material other than wood or wooden
objects.
Use your chain saw for cutting only. It is not designed for prying or shoveling away limbs, roots
or other objects.
When sawing, make sure that the saw chain does
not touch any foreign materials such as rocks,
nails and the like (g. 8). Such objects may be
ung off, damage the saw chain or cause the saw
to kick back.
9
10
9
In order to keep control of your saw, always maintain
a rm foothold. Never work on a ladder, in a tree or on
any other insecure support. Never use the saw above
shoulder height (g. 9).
10
Position the chain saw in such a way that your body is
clear of the cutting attachment whenever the engine
is running (g. 10).
Don’t put pressure on the saw when reaching the end
of a cut. The pressure may cause the bar and rotating
chain to pop out of the cut or kerf, go out of control and
strike the operator or some other object. If the rotating
chain strikes some other object a reactive force (see
pages 10 to 12 ) may cause the chain to strike the
operator.
Reactive forces during the cut, including kickback
WARNING!
Reactive forces, that may occur during any cut are
kickback, pushback and pull-in. Reactive forces
can be dangerous! In any chain saw, the powerful
force used to cut wood can be reversed (and work
against the operator).
If the rotating chain is suddenly stopped by contact
with any solid object like a log or branch or is pinched,
the reactive forces instantly occur. These reactive
forces may result in loss of control which may, in
turn, cause serious or fatal injury. An understanding
of the causes of these reactive forces may help you
avoid loss of control.
The most common reactive forces are
- kickback,
- pushback,
- pull-in.
11
Kickback:
Kickback occurs when the upper quadrant of the bar
nose contacts a solid object in the wood or is pinched
(g. 11). The reaction of the cutting force of the chain
causes a rotational force of the chain saw in the direc
tion opposite to the chain movement, mainly in the plane
of the bar. This may ing the bar in an uncontrolled arc
towards the operator.
12
This reaction can occur in a fraction of a second and
under some circumstances, cause the guide bar and
chain to strike the operator with enough force to cause
severe or fatal injury. It may also occur during limbing.
It also occurs when the nose of the guide bar is pinched
unexpectedly, unintentionally contacts solid material in the wood (g.12) or is incorrectly used to begin
a plunge or boring cut.
The greater the force of the kickback reaction, the more
difcult it becomes for the operator to control the saw.
Many factors inuence the occurence and force of
the kickback reaction. The type of bar and saw chain you
use is a factor in the force of the kickback reaction.
The speed of contact at which the cutter contacts
the object.
Kickback force increase with the rate of impact.
The contact angle between the nose of the bar and
the foreign object (g. 11).
Kickback is most pronounced in the upper quadrant
of the bar nose.
DOLMAR chain types are designed to reduce kickback
forces.
The depth gauges:
Improper lowering of the depth gauges also increases
the risk of a kickback.
Saw chain cutter sharpness:
13
To avoid kickback
The best protection from personal-injury that may result
from kickback is to avoid kickback situations:
1. Hold the chain saw rmly with both hands and
maintain a secure grip.
2. Be aware of the location of the guide bar nose at
all times.
WARNING!
A dull improperly sharpened chain may increase
the risk of kickback. Always cut with a properly
sharpened chain.
Devices for reducing the risk of kickback injury
DOLMAR have developed a special chain brake to
reduce the risk of kickbacks.
This chain brake increases the safety factor on the job,
e.g. when the saw suddenly kicks upwards the chain
stops rotating within a fraction of a second. A deection
guard on the disengaging lever of the chain brake and
a loop rear handle ensure that the operator’s hands are
fully protected at all times.
Kickback tendency increases as the radius or size of
the guide bar nose increases. DOLMAR have developed guide bars with small nose radius, to reduce the
kickback tendency.
WARNING!
No chain brake prevents kickback.
These brakes are designed only to stop the chain,
if activated.
To ensure a proper operation of the chain brake, it
must be properly maintained. Furthermore, there
must be a sufcient distance between the operator and the bar to ensure that the chain brake has
sufcient time to activate and stop the chain before
potential contact with the operator.
3. Never bring the nose of the guide bar in contact
with any object. Do not cut limbs with the nose
of the guide bar. Be especially careful with small,
tough limbs, small size brush and saplings which
may easily catch the chain.
4. Don’t overreach.
5. Don’t cut above shoulder height.
6. Begin cutting and continue at full throttle.
7. Cut only one log at a time.
8. Use extreme caution when re-entering a previous
cut.
9. Do not attempt plunge cuts (see page 14) if you are
not experienced with these cutting techniques.
10. Be alert for shifting of the log or other forces that
may cause the cut to close and pinch the chain.
11. Maintain saw chain properly. Cut with a correctly
sharpened, properly tensioned chain at all times.
12. Stand to the side of the cutting path of the chain
saw.
11
12
Pushback:
To avoid pull-in
Pushback occurs when the chain on the top of the bar
is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the
chain drives the saw straight back toward the operator
causing loss of saw control. Pushback fre-quently occurs
when the top of the bar is used for cutting (g. 14).
14
To avoid pushback
1. Be alert to forces or situations that may cause material to pinch the top of the chain.
2. Do not cut more than one log at a time.
3. Do not twist the saw when withdrawing the bar from
a plunge cut or under buck cut (gures 25 to 27
and 33, pages 14 and 15), because the chain can
pinch.
Pull-in:
Pull-in occurs when the chain on the bottom of the bar
is suddenly stopped. The chain on the bottom of the
bar stops when it is pinched, caught or encounters a
foreign object in the wood (see g. 15). The reaction of
the chain pulls the saw forward, causing the operator
to lose control.
1. Always start a cut with the chain rotating at full speed
and the spike bar in contact with the wood.
2. Pull-in may also be prevented by using plastic wedges
to open the kerf or cut.
Cutting techniques
Felling
Felling is cutting down a tree.
Before felling a tree, consider carefully all conditions
which may affect the direction of fall, including:
The intended direction of the fall.
The neutral lean of the tree.
Any unusually heavy limb structure.
Surrounding trees and obstacles.
The wind direction and speed.
WARNING!
Always observe the general condition of the tree.
Look for decay and rot in the trunk. If it is rotted
inside, it could snap and fall toward the operator
while being cut.
Also look for broken or dead branches which could
vibrate loose and fall on the operator. When felling
on a slope, the operator should stand on the up-hill
side.
Pull-in frequently occurs when the spike bar of the
saw is not held securely against the tree or limb and
when the chain is not rotating at full speed before it
contacts the wood.
15
WARNING!
Use extreme caution when cutting small size brush
and saplings which may easily catch the chain and
pull you off balance.
16
When felling in the vicinity of roads, railways and
power lines, etc., take extra precautions (see g.
16). Inform the police, utility company or railway
authority before beginning to cut.
45°
1
2
2
45°
= cutting down area
17
When felling, maintain a distance of at least 2 1/2 tree
lengths from the nearest person (see g. 17).
Note:
The noise of your engine may drown any warning
call.
First cut
Second cut
20
If the tree has large buttress roots, cut into the largest
buttresses vertically rst (horizontally next) and remove
(g. 20).
Direction of fall
21
18
Felling instructions:
First clear the tree base and work area from interfering
limbs and brush and clean its lower portion with an axe
(see g. 18).
45°
19
Then, establish a path of escape and remove all obstacles. This path should be opposite to the planned
direction of the fall of the tree and at a 45° angle (g.
19). An alternate path must also be selected. Place all
tools and equipment a safe distance away from the tree,
but not on the escape path.
Felling cut
Hinge
Felling notch
22
Felling notch
Hinge
23
Then, determine the placement of the felling notch
(g. 21). The felling notch when properly placed de-
termines the direction in which the tree will fall. It is
made perpendicular to the line of fall and should be as
close to the ground as possible. Cut the felling notch
to a depth of about one-fth to one-fourth of the trunk
diameter (g. 22). It should be in no case higher than it
is deep. Make the felling notch very carefully.
13
14
Begin the felling cut slighty higher than the felling notch
and on the opposite side of the tree (g. 22). Then cut
horizontally through towards the felling notch. Apply the
chain saw with its spikes directly behind the uncut por-
tion of wood and cut toward the notch (g. 23). Leave
approximately 1/10 of the tree diameter uncut! This is
the hinge (g. 23). Do not cut through the hinge because
you could lose control of the direction of the fall. Drive
wedges into the felling cut where necessary to control
the direction of the fall. Wedges should be of wood,
light alloy or plastic - never of steel, which can cause
kickback and damage to the chain.
Always keep to the side of the falling tree. When the
tree starts to fall, shut off the engine, withdraw the bar
and walk away on the pre-planned escape path. Watch
out for falling limbs.
WARNING!
Be extremely careful with partially fallen trees which
are poorly supported.
Plunge-Cut Method
Timber having a diameter more than twice the length of
the guide bar requires the use of the plunge-cut method
before making the felling cut.
First, cut a large, wide notch. Make a plunge cut in the
center of the notch.
The plunge cut is made with the guide bar nose. Begin
the plunge cut by applying the lower portion of the guide
bar nose to the tree at an angle (g. 25). Cut until depth
of the kerf is about the same as the width of the guide
bar (g. 26). Next, align the saw in the direction in which
When the tree hangs or for some other reason does
not fall completely, set the saw aside and pull the
tree down with a cable winch, block and tackle or
tractor. If you try to cut it down with your saw, you
may be injured.
Sectioning Method
WARNING!
Felling a tree that has a diameter greater than the
length of the guide bar requires use of either the
sectioning or plunge-cut method. These methods
are extremely dangerous because they involve the
use of the nose of the guide bar and can result in
kickback. Only properly trained professionals should
attempt these techniques.
25
the recess is to be cut. With the saw at full throttle, insert
the guide bar in the trunk (g. 27).
Enlarge the plunge cut as shown in illustration (g. 28).
26
24
For the sectioning method (g. 24) make the rst cut
with the guide bar fanning in toward the hinge. Then,
using the bumper spike as a pivot, reposition the saw
for the next cut. Avoid repositioning the saw more than
necessary. When repositioning for the next cut, keep the
guide bar fully engaged in the kerf to keep the felling cut
straight. If the saw begins to pinch, insert a wedge to
open the cut. On the last cut, do not cut the hinge.
27
28
29
Bucking
Bucking is cutting a log into sections.
WARNING!
There is an extreme danger of kickback at this point.
Extra caution must be taken to maintain control of
the saw. To make the felling cut, follow the section-
ing method described previously (g. 29). If you are
inexperienced with a chain saw plunge-cutting should
not be attempted. Seek the help of a professional.
Limbing
Limbing is removing the branches from a fallen tree.
WARNING!
There is an extreme danger of kickback during the
limbing operation. Do not work with the nose of the
bar. Be extremely cautious and avoid contacting the
log or other limbs with the nose of the guide bar. Do
not stand on a log while limbing it - you may slip or
the log may roll.
31
WARNING!
1. When bucking, do not stand on the log. Make
sure the log will not roll down-hill. If on a slope,
stand on the up-hill side of the log (see g. 31).
Watch out for rolling logs.
WARNING!
2. Cut only one log at a time.
WARNING!
3. Shattered wood should be cut very carefully.
Sharp slivers of wood may be caught and ung
in the direction of the operator of the saw.
30
Start limbing by leaving the lower limbs to support
the log off the ground (g. 30). Always cut from the
top of the limb. Do not underbuck freely hanging
limbs. A pinch may result or the limb may fall, causing loss of control. If a pinch occurs, stop the engine
and remove the saw, by lifting the limb.
WARNING!
Be extremely cautious when cutting limbs under
tension. The limbs could spring back toward the
operator and cause loss of control of the saw or
injury to the operator.
32
WARNING!
4. When cutting small logs, use a sawhorse (g.
32). Never permit another person to hold the log.
Never hold the log with your leg or foot.
15
16
33
34
Maintenance and Repair
Never operate a chain saw that is damaged, improperly adjusted or not completely or securely assembled.
Follow the maintenance and repair instructions in the
appropriate section of this manual.
WARNING !
Always stop the engine and make sure that the chain
is stopped before commencing any maintenance or
repair work or cleaning the saw. Allow the chain saw
to cool off before doing any maintenance work (burn
hazard)! Do not attempt any maintenance or repair
work not described in this manual. Have such work
performed by your DOLMAR service shop only.
Maintaining and storing the saw
Keep the chain, bar and sprocket clean and lubricated;
replace worn sprockets or chains.
WARNING!
5. Logs under strain require special attention to
prevent the saw from pinching. The rst cut
is made on the compression side to relieve the
stress on the log (see g. 33, 34). The bucking
cut is then made as shown. If the saw pinches,
stop the engine and remove it from the log.
35
WARNING!
Keep the chain sharp. You can spot a dull chain when
easy-to-cut wood becomes hard to cut and burn marks
appear on the wood.
Keep the chain at proper tension. Tighten all nuts, bolts
and screws except the carburetor adjustment screws
after each use.
Keep spark plug and wire connection tight and clean.
Store saws in a high or locked place, away from children.
6. Only properly trained professionals should work
in an area where the logs, limbs and roots are
tangled (i. e. a blowdown area, g. 35). Working
in blowdown areas is extremely hazardous.
WARNING!
7. Drag the logs into a clear area before cutting.
Pull out exposed and cleared logs rst.
Denomination of components
DOLMAR GmbH, 22045 Hamburg, Germany
PS-34
0404 12345
036.100.300
16" (400mm)
528.092.056
412.040.661
21
22
21
23 24
3
4
1110 12
13 14
9
5
20
67
1516171819
8
Identication plate
1 Rear handle
2 Filter cover
3 Mufer with spark arrester screen
4
Spike bar
(toothed stop for holding saw steady against wood)
5 Retaining nuts
6 Chain catch
7 Sprocket guard
8 Adjusting screws for carburetor
9 Hand guard (release for chain brake)
10 Starter grip
11 Fuel pump (Primer)
12 Combination switch, choke, Start/Stop (I/O)
Year of manufacture
Serial number
Indicate when ordering spare parts!
13 Throttle lever
Throttle stopper
14
15
Rear hand guard
16 Fuel tank cap
17 Field of vision for fuel
18 Fan housing with starting assembly
19 Identication plate
20 Oil tank cap
21 Field of vision for oil
22 Tubular handle
23 Guide bar
24 Chain
17
18
Technical data PS-34 PS-45
Single-cylinder two-stroke
Piston displacement 2.0 cu. in (33 cm3) 2.75 cu. in (45.1 cm3)
Cylinder bore 1.45" (37 mm) 1.69" (43 mm)
Piston stroke 1.22" (31 mm) 1.22" (31 mm)
Max. power at speed 1.3 / 9,000 kW/rpm 1.7 / 9,000 kW/rpm
Max. torque at speed 1.7 / 6,500 Nm/rpm 2.4 / 6,500 Nm/rpm
Idling speed 2,800 rpm 2,600 rpm
Sound Pressure Level at the operator’s ear
at full load according to ANSI B 175.1 98 db(A) 99.1 db(A)
Sound Pressure Level at the bystander’s position
(50ft/15 m distance) according to ANSI B 175.1 73 db(A) 76.1 db(A)
Ignition system
Electronic, without breaker
Spark plug NGK BPMR 7A NGK BPMR 7A
or Spark plug
Electrode gap .020" (0.5 mm) .020" (0.5 mm)
Fuel system
Carburetor (for Canada) ZAMA with limiter caps ZAMA with limiter caps
Carburetor (for USA) ZAMA with limiter caps ZAMA with limiter caps
(all position diaphragm carburetor
with integral fuel pump)
Fuel tank capacity 13.0 oz. (0.37 l) 13.0 oz. (0.37 l)
Fuel mixture see chapter "Fuel" see chapter "Fuel"
Weight
without cutting attachment 10 lbs. 5 oz. (4.7 kg) 10 lbs. 7 oz. (4.75 kg)
Cutting attachment
Guide bar sprocket nose bar sprocket nose bar
Cutting length 14" (35 cm) • 16" (40 cm) 14" (35 cm) • 16" (40 cm)
Safety saw chain (pitch) 3/8" (528 092 ...) (528 092 ...)
Drive link gauge .050" .050"
Chain sprocket 6 teeth 6 teeth
Chain lubrication fully automatic oil pump fully automatic oil pump
Oil tank capacity 8.8 oz. (0.25 l) 8.8 oz. (0.25 l)
Approved bar and chain combinations
"Low-kickback saw chain is a chain which has met the
kickback performance requirements of ANSI B 175.11991 (American National Standard for Power ToolsGasoline-Powered Chain Saws-Safety Requirements)
when tested on the representative sample of chain saws
below 3.8. C.l.D. specifed in ANSI B 175.1-1991". The
approved bar and chain combinations are low kickback
chains according to ANSI B 175.1-1991 and also meet
Do not use other replacement bars and chains
unless they have been designated as meeting the
ANSI B 175.1-1991 (for USA) and CSA Z62.3-96
(for Canada) kickback performance requirements
on that specic powerhead, or has been designated
as "low kickback" saw chain in accordance with the
ANSI B 175.1-1991 (for USA) and CSA Z62.3-96
(for Canada) standard.
WARNING
the kickback requirements of CSA Z62.3-96 for chain
saws below 80 cm3.
The chain saw PS-34 and PS-45 has been approved
with following guide bar and chain combinations:
Drive link gauge .050"
Guide bar 3/8"
Saw chain 3/8"
length Part no. Part no.
14" (35 cm) 412 035 661 528 092 052
16" (40 cm) 412 040 661 528 092 056
"There may be other replacement bar and chain combinations available that also reduces the risk of injury
from kickback".
1
2
3
45
A
67
PUTTING INTO OPERATION
CAUTION:
Before doing any work on the guide bar or chain, always
switch off the engine and pull the plug cap off the spark
plug (see "Replacing the spark plug"). Always wear protective
gloves!
CAUTION:
Start the chain saw only after having assembled it com-
pletely and inspected!
Mounting the guide bar and saw chain
Use the universal wrench delivered with the chain saw for
the following work.
Put the chain saw on a stable surface and carry out the following
steps for mounting the guide bar and chain:
Release the chain brake by pulling the hand guard (1) in direction of arrow.
Unscrew retaining nuts (2).
Pull off the sprocket guard (3).
B
C
Turn the chain adjusting screw (4) to the left (counterclockwise)
until the pin (5) is at the left stop.
Position the guide bar (6). Make sure that the pin (7) of the chain
tightener is in the hole on the guide bar.
D
19
20
2
3 813
2
8 12
8 10
11
9
Lift the chain (8) over the sprocket (9). Using your right hand, guide
the chain into the top guide groove (10) on the guide bar.
The cutting edges along the top of the chain must
point in the direction of the arrow (11)!
Pull the chain (8) around the sprocket nose (12) of the guide
bar in the direction of the arrow.
E
Replace the sprocket guard (3), putting the chain (8) over the
chain catcher (13).
Manually tighten the retaining nuts (2).
Tightening the saw chain
Turn the chain tightener (C/4) to the right (clockwise)
until the chain engages the guide groove of the bottom side of
the bar (see circle).
Slightly lift the end of the guide bar and turn the chain adjusting
screw (C/4) to the right (clockwise) until the chain rests against
the bottom side of the guide bar.
While still holding up the guide bar, tighten the retaining nuts
(2) with the universal wrench.
F
G
H
2
A
12
1
Checking the chain tension
The tension of the chain is correct if the chain rests against
the bottom side of the guide bar and can still be easily turned
by hand.
While doing so the chain brake must be released.
Check the chain tension frequently - new chains tend to get
longer during use!
When checking the chain tension the engine must be switched
off.
NOTE:
It is recommended to use 2-3 chains alternatively.
In order to guarantee uniform wear of the guide bar the bar
should be turned over whenever replacing the chain.
Tightening the saw chain
Turn the retaining nuts (A/2) approximately one turn with
the universal wrench. Slightly lift the end of the guide bar
and turn the chain adjusting screw to the right (clockwise) until
the chain rests against the bottom side of the guide bar.
While still holding up the guide bar, tighten the retaining nuts
(A/2) with the universal wrench.
B
Chain brake
The PS-34 and PS-45 comes with an inertia chain brake as
standard equipment. If kickback occurs due to contact of the
guide-bar tip with wood (see SAFETY PRECAUTIONS, page 6,
10, 11), the chain brake will stop the chain through inertia if the
kickback is sufciently strong.
The chain will stop within a fraction of a second.
The chain brake is installed to block the saw chain before
starting it and to stop it immediately in case of an emer-
gency.
IMPORTANT: NEVER run the saw with the chain brake
activated (except for testing, see “Checking the chain bra-
ke”)! Doing so can very quickly cause extensive engine
damage!
ALWAYS release the chain brake before starting the
work!
C
Engaging the chain brake (braking)
If the kickback is strong enough the sudden acceleration of
the guide bar combined with the inertia of the hand guard (1)
will automatically actuate the chain brake.
To engage the chain brake manually, simply push the hand
guard (1) forward (towards the tip of the saw) with your left
hand (arrow 1).
Releasing the chain brake
Pull the hand guard (1) towards you (arrow 2) until you feel it
catch. The brake is now released.
21
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