Makita DPC7341HD, DPC7331HD User Manual
Instruction and Safety Manual
for Gasoline Power Cuts
DPC7331HD
DPC7341HD
WARNING!
Read and understand this Manual. Always follow safety precautions in the Instruction 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!
2
EMISSIONS COMPONENT DEFECT WARRANTY COVERAGE
MAKITA U.S.A, Inc 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 MAKITA 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 plugs
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
Air cleaner plate, Air lter
Fuel hoses, clamps and sealing gaskets
Air cleaner case, Intake manifold
OBTAINING WARRANTY SERVICE
To obtain warranty service, take your engine to the nearest MAKITA Factory Service Center or service Center authorized by MAKITA.
Bring your sales receipts indicating date of purchase for this engine. The dealer of service authorized by MAKITA 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 MAKITA.
WHAT IS NOT COVERED
• Conditions resulting from tampering, misuse, improper adjustment (unless they were made by the service dealer authorized by
MAKITA 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.
MAKITA recommends that you retain all receipts covering maintenance on your engine, but MAKITA 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 MAKITA 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 MAKITA when a problem exists.
If you have any questions regarding your warranty rights and responsibilities, you should contact the MAKITA Warranty service
Department at 1-800-4-MAKITA (462-5482) 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. MAKITA 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 MAKITA. 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 MAKITA 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 MAKITA 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 MAKITA. In the event that any
emission-related part is found to be defective during the warranty period, you shall notify MAKITA Warranty service Department
at 1-800-4-MAKITA (462-5482) and you will be advised of the appropriate warranty service dealer or service providers where the
warranty repair can be performed.
Thank you for purchasing a MAKITA product!
Congratulations on choosing a MAKITA Power Cut cutoff saw!
We are condent that you will be satised with this modern
piece of equipment. Like our chain saws, the MAKITA Power
Cuts feature specially designed high-performance engines
with outstanding power-to-weight ratios, for heavy-duty yet
lightweight tools.
Other advantages of the MAKITA Power Cuts:
• Sturdy construction and high reliability.
• Maintenance-free electronic ignition, hermetically sealed to
protect against dust and moisture.
• Vibration damping with the MAKITA 2-mass system (D2M) for
tireless working even when guiding the Power Cut by hand.
• Five-stage air-lter system for reliable working even under
very dusty conditions.
• Two options for mounting the cutter attachment: Either cen
trally, for good balance when guiding the unit manually, or on
the side, for ush cuts along walls or curbsides or horizontally
directly above the ground.
Extensive range of resin-bonded and diamond grit cutting
•
discs, trolley with dust catcher, and systems for supplying
water to the disc.
The following industrial property rights apply:
US 08510690, SE 95027298, SE 95027306, IT 95000653,
IT 95000654, GBM 9412558, GBM 9412559.
We want you to be satised with your MAKITA product.
In order to guarantee the optimal function and performance of
your Power Cut and to ensure your personal safety we would
request you to perform the following:
Read this Instruction and Safety Manual carefully before
putting the Power Cut into operation for the rst time,
and strictly observe the safety regulations! Failure to observe these precautions can lead to severe injury or death!
WARNING!
Some dust created by power sanding sawing, grinding, drilling, and other construction activities contains
chemicals known (to the State of California) to cause
cancer, birth defects or other reproductive harm.
Some examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and
other masonry products, and
• arsenic and chromium from chemically treated lumber.
Your risk from these exposures varies, depending on
how often you do this type of work.
To reduce your exposure to these chemicals: work in
a well ventilated area, and work with approved safety
equipment, such as those dust masks that are specially
designed to lter out microscopic particles.
Table of contents Page
Packing ................................................................................ 3
Delivery inventory ..............................................................4
Symbols ............................................................................... 4
SAFETY PRECAUTIONS
Intended use ................................................................... 5
General precautions .......................................................
Protective equipment ...................................................
Fuels / Refuelling ............................................................
Putting into operation ......................................................
Cutting discs ...................................................................
Kickback and lock-in .......................................................
Working behavior / Method of working
Cutting metal ...................................................................
-
Cutting masonry and concrete ...................................
Transport and storage ...................................................
Maintenance .................................................................
First aid .........................................................................
Technical data ................................................................... 12
Denomination of components ......................................... 12
PUTTING INTO OPERATION
Mounting the cutting disc ............................................... 13
Tightening the V-belt / Checking V-belt tension ............
Fuels / Refuelling .....................................................
Starting the engine ........................................................
Cold-starting .................................................................
Warm-starting ...............................................................
Stop engine ................................................................... 17
Adjusting the carburetor .................................................. 18
MAINTENANCE
Changing the V-belt ......................................................
Cleaning the protection hood ........................................20
Cleaning / changing the air lter .............................. 20-21
Replacing the spark plug ..............................................
Replacing the suction head ..........................................
Replacing the starter cable ...........................................
Replacing the return spring ........................................... 24
Cutting attachment in central / side position ............25-26
Repositioning the cutting attachment .......................25-26
Replacing/cleaning the spark arrester screen ..............26
SPECIAL ACCESSORIES
Diamond cutting discs, trolley, water tank
and pressure water system .................................................27
Instructions for periodic maintenance ........................... 28
Service, spare parts and guarantee ................................ 29
Troubleshooting ............................................................... 30
Extract from spare parts list ............................................ 31
Accessories ..................................................................31
Service stations (see enclosure)
............................ 8
5
5-6
6
6
7
8
9
9-10
10
11
11
14
14-15
16
16
17
19
22
22
23
Packing
Your MAKITA Power Cut is packed in a cardboard box to prevent shipping damage.
Cardboard is a basic raw material and is consequently reuseable
or suitable for recycling (waste paper recycling).
The Emissions Compliance Period referred to on the emission
Compliance label indicates the number of operating hours for
which the engine has been shown to meet federal emissions
requirements.
Category C= 50 hours, B= 125 hours, and A= 300 hours.
3
4
6 5 4 3 2 1
Delivery inventory
1. Power Cut
2. Cutting disc
3. Adapter ring 20/25.4
4. Screwdriver
5. Offset screwdriver
6. Universal wrench 13/19
7. Instruction manual
(for carburetor adjustment)
(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 saw and in the Instruction Manual:
Read instruction manual and
follow the warning- and safety
precautions!
Particular care and caution!
Forbidden!
Wear helmet and eye, respiratory
and hearing protection!
Wear protective gloves!
Wear respiratory protection!
Hazardous dust and/or
gas emission!
Never use carbide tipped, circular saw
blades or any kind of wood cutting
blades!
Combination Start/Stop (I/O) switch,
choke
Starting procedure
(Press decompression valve,
Engine - manual start)
Stop engine!
Warning!
Kickback!
Fire hazard from ying sparks!
No smoking!
No open re!
Direction of cutting wheel rotation
Warning: the max. peripheral
speed of the cutting disc is 80 m/s!
Cutting disc dimensions
Fuel and oil mixture
First aid
Recycling
Do not touch hot surfaces!
FE
SAFETY PRECAUTIONS
Intended use
Power Cut
Use the Power Cut cutoff saw outdoors only, for trimming and cutting
suitable materials, using cutting discs rated for this machine.
Improper use:
Never use the cutoff saw cutting discs for grinding or sanding (using
the side of the cutting disc to remove material). The disc can break!
Never use the Power Cut with saw blades, cutter blades, brushes,
carbide tipped, wood cutting blades etc.
Unauthorised users:
Persons unfamiliar with the Instruction Manual, children, young
people, and persons under the inuence of alcohol, drugs or medi-
cations must not use the Power Cut.
General precautions
- The operator MUST read this instruction manual to ensure
safe operation (even if you already have experience in using cutoff saws). It is important to be familiar with the opera-
tion of this particular cutoff saw. Users insufciently informed
will endanger themselves as well as others due to improper
handling.
- Let only persons who have experience in using cutoff saws work
with this unit. When letting another person use the Power Cut,
this instruction manual must be provided along with it.
- First-time operators should ask a specialist to instruct them in
working with gasoline-powered cutoff saws.
- Children and persons under 18 years of age must not be allowed
to use this Power Cut. Persons over the age of 16 years may,
however, use the Power Cut for the purpose of being trained as
long as they are under the supervision of a qualied trainer.
- Working with the Power Cut requires high concentration.
- Operate the Power Cut only if you are in good physical condition.
If you are tired, your attention will be reduced. Be especially
careful at the end of a working day. Perform all work calmly and
carefully. The user has to accept liability for others.
- Never work while under the inuence of alcohol, drugs, medica
tion or other substances which may impair vision, dexterity or
judgement.
- A re extinguisher must be available in the immediate vicinity
when working in easily inammable vegetation or when it has
not rained for a long time (danger of re).
- Asbestos and other materials that can release toxins may be cut
only with the necessary safety precautions and after notication
of the proper authorities and under their supervision or that of
a person appointed by them.
- The use of dust-reduction devices is urgently recommended
(see Accessories, pressure water tank, water tank).
wear protective goggles (C) or visor when using the Power
Cut.
- To prevent hearing damage, always wear suitable personal
hearing protection. (ear muffs (D), ear plugs, etc.). Octave
brand analysis upon request.
- When dry-cutting dust-producing materials such as stone
or concrete, always wear approved respiratory protection
(E).
-
Work gloves (F) of tough leather are part of the required
work kit of the Power Cut and must always be worn when
working with the Power Cut.
1
2
Protective equipment
- In order to avoid head, eye, hand or foot injuries as well as
to protect your hearing the following protective equipment
must be used during operation of the Power Cut:
- The kind of clothing should be appropriate, i. e. it should be tight-
tting but not be a hindrance. Clothing in which grains of material
can accumulate (trousers with cuffs, jackets and trousers with
wide-open pockets, etc.) must not be worn, particularly when
cutting metal.
- Do not wear any jewellery or clothing that can get caught or
distract from the operation of the Power Cut.
- It is necessary to wear a protective helmet whenever working
with the Power Cut. The protective helmet (A) is to be checked
in regular intervals for damage and is to be replaced after 5
years at the latest. Use only approved protective helmets.
- The helmet
grains. In order to prevent injuries to eyes and face, always
visor (B) protects the face from dust and material
3
4
5
6
H
G
- Always wear safety shoes or boots (G) with steel toes, non-skid
soles, and leg protectors when working with the Power Cut.
Safety shoes equipped with a protective layer provide protection
against cuts and ensure a secure footing.
- Always wear a
ame-retardant qualities whenever working with the cutoff
saw.
work suit (H) of tough material with sufcient
Fuels / Refuelling
- Go to a safe, level place before refuelling. Never refuel while
on scaffolding, on heaps of material, or in similar places!
- Switch off the engine before refuelling the Power Cut.
- Do not smoke or work near open res (6).
- Let the engine cool down before refuelling.
- Fuels can contain substances similar to solvents. Eyes and skin
should not come in contact with mineral oil products. Always wear
protective gloves when refuelling (not the regular work gloves!).
Frequently clean and change protective clothes. Do not breathe
in fuel vapors. Inhalation of fuel vapours can be hazardous to
your health.
- Do not spill fuel. If a spill occurs, clean off the Power Cut im
mediately. Fuel should not come in contact with clothes. If your
clothes have come in contact with fuel, change them at once.
- Ensure that no fuel oozes into the soil (environmental protection).
Use an appropriate base.
- Refuelling is not allowed in closed rooms. Fuel vapors will ac
cumulate near the oor (explosion hazard).
- Ensure to rmly tighten the screw cap of the fuel tank.
- Before starting the engine, move to a location at least 3 meters
(approx. 10 feet) from where you fuelled the Power Cut (7), but
not within the extended swing range of the cutting disc (direction
of sparks).
- Fuel cannot be stored for an unlimited period of time. Buy only
as much as will be consumed in the near future.
- When making up the gasoline/oil mixture, always put the oil in
the mixing container rst, and then the gasoline.
- Use only approved and marked containers for the transport and
storage of fuel.
-
Keep fuel away from children!
5
-
6
-
3 meters
(10 feet)
7
Putting into operation
- Do not work on your own. There must be someone around
in case of an emergency (within shouting distance).
- Observe all anti-noise regulations when working in residential
areas.
-
Never use the Power Cut near inammable materials or
explosive gases! The Power Cut can create sparks leading
to re or explosion!
- Make sure that all persons within 30 meters (100 feet), such
as other workers, are wearing protective gear (see "Protective
Equipment") (8). Children and other unauthorized persons must
remain more than 30 meters away from the working area. Keep
an eye out for animals as well (9).
-
Before starting work the Power Cut must be checked for
perfect function and operating safety according to the prescriptions. In particular, make sure that the cutting wheel is in
good condition(replace immediately if torn, damaged or bent),
the cutting wheel is properly mounted, the protective hood is
locked in place, the hand guard is properly mounted, the V-belt
has the proper tension, the throttle moves easily and the halfthrottle lock button functions properly, the grips are clean and
dry, and the combination switch functions properly (Start/Stop
(I/O) switch, choke). Visually inspect the mufer for damage and
possible dirt in the mufer area.
- Start the Power Cut only after complete assembly and inspec
tion. Never use the Power Cut when it is not completely assembled.
30 m (100 feet)
8
-
9
= wearing Protective Equipment
S
T
O
P
Cutoff discs
- The protection hood must always be on! Change discs only
with the engine off!
- There are two basic types of cutoff discs:
- For metal (hot cutting)
- For masonry (cold cutting)
WARNING!
Never use carbide tipped, circular saw blades or any kind of wood
cutting blades. Never cut any type of wood. Reactive forces can
cause severe personal injury from blade contact or thrown tips.
NOTE: When using diamond cutoff discs, always make sure to observe
the "direction of rotation" markings. Diamond discs should only be
used for cutting masonry/brick/ concrete etc.
- Cutoff discs are intended only for radial loading, i.e. for cutting. Do
not grind with the sides of the cutting disc! This will break the disc
(10)!
Caution!
Never change direction (turning radius less than 5 meters (16
feet), exert lateral (sideways) pressure, or tip the Power Cut during cutting (11)!
- Use a cutting disc only for cutting the materials it is intended for. The
proper type of disc must be used, for either metals or masonry.
- The arbor hole of the cutting disc must be an exact t with the arbor
or shaft. If the arbor hole is larger, it must be tted with an adapter
ring (available as an accessory).
- The cutting disc must be rated for freehand cutting at up to 3850
rpm or 80 m/sec for 400 mm discs, 4370 rpm or 80 m/sec for 350
mm discs, or up to 5100 rpm or 80 m/s for 300 mm discs.
cutting discs that comply with EN 12413, EN 13236.
- The disc must be free of defects (12). Do not use defective cutting
discs.
Always tighten the cutting disc mounting bolt to a torque of 30
Nm. Otherwise, the cutting disc can twist.
- Before starting the cutting disc, make sure you have a steady foot
ing.
- Put the Power Cut into operation only as described in this instruc
tion manual (13). Always place your left foot in the rear handle and
grasp the other handle rmly (with thumb and ngers). Other starting
methods are not allowed.
- When starting the Power Cut it must be well supported and securely
held. The cutting disc must not be touching anything.
- If the cutting disc is new, test it by running it at least 60 seconds at
top speed. When doing this, make sure that no persons or body parts
are in the extended swing range of the disc, in case it is defective
and ies apart.
-
When working with the Power Cut always hold it with both
hands. Take the back handle with the right hand and the tubular
handle with the left hand. Hold the handles tightly with your thumbs
facing your ngers.
-
CAUTION: When you release the throttle lever the disc will
keep spinning for a short period of time (free-wheeling effect).
- Continuously ensure that you have a safe footing.
-
Hold the Power Cut such that you will not breathe in the
exhaust gas. Do not work in closed rooms or in deep holes
or ditches (danger of poisoning by fumes).
WARNING – CARBON MONOXIDE PRODUCED DURING USE
-
CAN KILL – DO NOT USE POWER CUTTER INDOORS – MAKE
SURE THERE IS PROPER VENTILATION WHEN USING POWER
CUTTER IN TRENCHES OR OTHER CONFINED SPACES.
Switch off the Power Cut immediately if you observe any
-
changes in its operating behavior.
Switch off the engine before inspecting the V-belt tension or
-
tightening it, replacing the cutting wheel, repositioning the cutter
attachment (side or middle position) or eliminating faults (14).
- Turn off the engine immediately and check the disc if you hear or
feel any change in cutting behaviour.
- Turn off the Power Cut when taking a break or stopping work (14).
Place the unit in such a way that the disc is not touching anything
and cannot endanger anyone.
- Do not put the overheated Power Cut in dry grass or on any inam
mable objects. The mufer is very hot (danger of re).
IMPORTANT: After wet cutting, rst turn off the water feed and then
-
let the disc run at least 30 seconds, to ing off the remaining water
and prevent corrosion.
Use only
10
min. 5 m
11
-
-
12
13
-
14
(16 feet)
● Maintenance
● Refuelling
● Changing cutoff discs
● Repositioning the
cutting attachment
● Stopping work
● Transport
● Putting out of function
7
8
Kickback and lock-in
- When working with the Power Cut there is a danger of kickback
and lock-in.
- Kickback occurs when the top of the cutting disc is used for
cutting (15).
- This causes the Power Cut to be thrown back toward the user
with great force and out of control. Risk of injury!
To prevent kickback, observe the following:
- Never cut with the section of the cutting disc shown in gure 15.
Be especially careful when reinserting the disc into cuts
that have already been started!
- Lock-in occurs when the cut narrows (crack, or workpiece under
stress).
- This causes the Power Cut to suddenly jump forward, out of
control and with great force. Risk of injury!
To prevent lock-in, observe the following:
- When reinserting the disc into previous cuts, have the Power
Cut running at top speed. Always cut at top speed.
- Always support the workpiece so that the cut is under tension
(16), so that the cut does not press together and jam the cutting
disc as it proceeds through the material.
- When starting a cut, apply the disc to the workpiece with care.
Do not just shove it into the material.
- Never cut more than one piece at a time! When cutting, make
sure that no other workpiece comes into contact.
15
Working behavior / Method of working
- Before starting work, check the work area for any hazards
(electrical wires, inammable substances). Clearly mark the
work area (for example with warning signs or by cordoning off
the area).
- When working with the Power Cut hold it rmly by the front and
rear handles. Never leave the Power Cut unattended!
- Use the Power Cut at high speed as far as possible (see “Technical Data”).
- Only use the Power Cut during good light and visibility periods.
Be aware of slippery or wet areas, and of ice and snow (risk of
slipping).
- Never work on unstable surfaces. Make sure that there are no
obstacles in the working area, risk of stumbling. Always ensure
that you have a safe footing.
- Never cut above your shoulder height (17).
- Never stand on a ladder to cut (17).
- Never use the Power Cut while standing on scaffolding.
- Do not lean over too far when working. When putting down and
picking up the Power Cut, do not bend over from the waist, but
instead bend in the knees. Save your back!
- Guide the Power Cut in such a way that no part of your body
is within the extended swing range of the disc (18).
- Use cutting discs only for the materials for which they are designed!
- Use cutting discs only for the materials for which they are designed. Do not use the Power Cut to lift up and shovel away
pieces of material and other objects.
Important! Before cutting, remove all foreign objects, such as
rocks, gravel, nails etc. from the cutting area. Otherwise, such
objects can be ung away by the disc with great speed. Injury
hazard!
- When cutting workpieces down to length use a rm support.
If necessary, secure the workpiece from slipping, but do not
steady it with your foot or allow another person to hold it.
- When cutting round items, always secure them against rotation.
- When guiding the Power Cut by hand, use the side mounting
position of the cutter attachment only when actually necessary.
Otherwise, always use the central position. This gives the unit
a better balance, for reduced operator fatigue.
16
17
18
When using synthetic resin cutting discs, always observe the following:
CAUTION:
- Synthetic resin cutting discs can absorb moisture. This
moisture can cause the disc to become unbalanced at high
speed. This imbalance can cause the disc to break.
- Do not cool resin cutting discs with water or other uids.
- Do not expose resin cutting discs to high humidity or
rain!
Do not use resin cutting discs past their use-by date (expiration date)! The date (quarter and year) is stamped on the disc’s
arbor ring.
EXAMPLE: 04 / 2007
This cutting disc can be used through the end of the fourth quarter
of 2007, if properly stored and correctly used.
Cutting metals
IMPORTANT!
Always wear approved respiratory protection!
Materials that can release toxic substances may be cut only
after notifying the proper authorities and under their supervision or that of a person appointed by them.
CAUTION!
The rapid rotation of the cutting disc heats metal and melts it
at the point of contact. Swing the guard as far down as possible (19) in order to direct the stream of sparks forward, away
from the operator (re hazard).
- Determine the cut line, mark the cut and apply the disc to the
material at moderate speed, to cut a guide groove before going
to top speed and applying more pressure to the Power Cut.
- Keep the disc straight and vertical. Do not tip it, as this can
break it.
- The best way to get a good, clean cut is to pull or move the
Power Cut back and forth. Do not simply press the disc into
the material.
- Thick round stock is best cut in stages (20).
- Thin tubing and pipes can be cut with a simple downward
cut.
- Cut large-diameter pipes as for round stock. To prevent tipping
and for better control, do not let the disc sink too deeply into
the material. Instead, always cut shallow around the whole
piece.
- Worn discs have a smaller diameter than new discs, so that at
the same engine speed they have a lower effective circumferential speed and therefore do not cut as well.
- Cut I-beams and L-bars in steps; see Figure 21.
- Cut bands and plates like pipes: along the wide side with a long
cut.
- When cutting material under stress (supported material or mate
rial in structures), always make a notch in the thrust (pressure)
side, and then cut from the tension side, so that the disc does
not lock in. Secure cutoff material from falling!
Cutting masonry and concrete
IMPORTANT!
Always wear approved respiratory protection!
Asbestos and other materials that can release toxic substances may be cut only after notifying the proper authorities
and under their supervision or that of a person appointed
by them. When cutting prestressed and reinforced concrete
piles, follow the instructions and standards of the responsible authorities or the builder of the structural member.
Reinforcement rods must be cut in the prescribed sequence
and in accordance with applicable safety regulations.
NOTE:
Mortar, stone, and concrete develop large quantities of dust during
cutting. To increase the lifetime of the cutting disc (by cooling),
to improve visibility, and to avoid excessive dust creation, we
strongly recommend wet cutting instead of dry cutting.
19
20
-
CAUTION!
If there is a chance that the material is under stress, be prepared for it to kick back. Make sure you can get out of the
way if you have to!
Be particularly careful in scrap-metal yards, junkyards, at ac
cident sites, and with haphazard piles of material. Precariously
balanced pieces or pieces under stress can act in unpredictable
ways, and may slide, jump out, or burst. Secure cutoff material
from falling! Always exercise extreme caution and use only
equipment that is in perfect working order.
Observe the accident-prevention rules and regulations of your
employer and/or insurance organization.
-
21
9
10
In wet cutting, the disc is wetted at an equal rate on both sides by
a trickle of water. MAKITA offers the right accessories for all wet
cutting applications (see also "SPECIAL ACCESSORIES").
- Remove foreign objects such as sand, stones and nails found
within the working area. Caution: Watch out for electric wires
and cables!
The rapid rotation of the cutting disc at the point of contact
throws fragments out of the cut groove at high speed. For
your safety, swing the protection hood down as far as possible (23), so that material fragments are thrown forward,
away from the operator.
- Mark the cut, and then make a groove about 5 mm (just under
1/5") along the entire length of the planned cut. This groove will
then guide the Power Cut accurately guring the actual cutoff.
NOTE:
For long, straight cuts we recommend using a trolley (24, see
also "SPECIAL ACCESSORIES"). This makes it much easier to
guide the unit straight.
- Perform the cut with a steady back-and-forth motion.
- When cutting slabs to size, you need not cut through the entire
material thickness (creating unnecessary dust). Instead, simply
make a shallow groove, and then knock off the excess material
cleanly on a at surface (25).
CAREFUL!
When cutting into lengths, cutting through material, making cutouts,
etc., always make sure to plan the direction and sequence of cuts
in such a way that the disc does not get jammed by the cut-off
piece, and that no persons can be injured by falling pieces.
Transport and storage
- Always turn off the Power Cut when transporting it or
moving it from place to place on a site (26).
Never carry or move the unit with the engine on or the
-
disc moving!
- Carry the unit only by the tubular (middle) handle with the cut
ting disc pointing behind you (26). Avoid touching the exhaust
mufer (burn hazard!)
- When moving the Power Cut over longer distances, use a
wheelbarrow or wagon.
- When transporting the Power Cut in a vehicle, make sure it is
securely positioned in such a way that no fuel can leak out.
Always remove the cutting disc before transporting the unit in
a vehicle. Before transporting in a vehicle, allow the Power Cut
to cool off completely. Note: Mufers with catalytic converters
take longer to cool off!
- The Power Cut should be stored safely in a dry place. It must
not be left outdoors! Always dismount the cutting disc before
storage. Keep the Power Cut away from children.
- Before long-term storage and before shipping the Power
Cut, follow the instructions in the chapter on "Periodic
care and maintenance". ALWAYS empty the fuel tank and
run the carburetor dry.
- When putting cutting discs in storage, be careful to:
Clean and dry them well. CAUTION: Do NOT clean synthetic
•
resin cutting discs with water or other uids!
Store them lying down at.
•
Avoid dampness, freezing temperatures, direct sunshine,
•
high temperatures and temperature uctuations, as these
can cause breakage and splintering.
Before re-using a resin cutting disc, make sure of the use-by
•
(expiration) date (quarter and year, stamped on the arbor
ring). If this date has been exceeded, do NOT use the cutting
disc.
Always check new cutting discs or cutting discs that have
-
been in storage to make sure that they are free of defects
and before the rst cut test-run the tool at top speed for at
least 60 seconds. Keep body parts and people well away out
of range of the direction of the cutting disc during this test.
23
24
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25
26
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