Panasonic 999000 User Manual
GAS-POWERED CUTOFF SAW
Item# 999000
OWNER’S MANUAL
Read carefully and understand RULES FOR SAFE OPERATION and instructions before
operating. Failure to follow the safety rules and other basic safety precautions may
result in serious personal injury.
Introduction
Thank you for choosing a Northern Tool + Equipment product, the Cutoff Saw, Item# 999000.
For future reference, please complete the owner’s record below:
Model:____________________________ Purchase Date:_______________________
Save the receipt, warranty and this Owner’s Manual. It is important that you read the entire
manual to become familiar with this product before using it
This Manual contains operating and safety instructions for your cutoff saw. For maximum
performance and satisfaction from your cutoff saw, it is important that you read and
understand the maintenance and safety manual before operating the saw. Northern Tool +
Equipment strongly recommends that this machine not be modified and/or used for any
application other than that for which it was designed. If you have any questions or do not
understand any of the instructions in this Manual, please call 1-800-222-5381.
Because the cutoff saw operates at high speeds, special safety precautions must be observed
before operating the saw. Careless or improper use could cause serious or even fatal injury.
The engine for the cutoff saw has been approved and certified by U.S. EPA
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Table of Contents
Main parts and their functions 3–5
Safety precautions 5–8
Specifications 9
Operation guide to the cutoff saw 10–13
1. Before starting 10–11
2. Starting 11–12
3. Operation 12
4. Emergency Stopping 12
5. Notes on operation 12–13
Adjustment of cutoff saw 13
1. Adjusting V-belt tension 13
2. Adjusting carburetor 13
3. Adjusting blade guard 13
Maintenance & repair of cutoff saw 13–15
1. Cleaning and maintenance of air filter 13–14
2. Maintenance of spark plug 14
3. Replacing starter rope 14–15
4. Replacing pawl 15
5. Maintenance chart 16
Storing cutoff saw 17
Exploded parts views and parts lists 18–25
1. Crankshaft Housing Assembly 18
2. Crankshaft & Piston Assembly 19
3. Cylinder & Muffler Assembly 20
4. Oil Tank & Carburetor 21
5. Handle & Main Cover Assembly 22
6. Air Filter Assembly 23
7. Cutter Assembly 24
8. Transmission Box & Assembly 25
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Main parts of the cutoff saw and their functions
This product is composed of two main sections: a gasoline-powered 2-stroke engine and a
driving/cutting system. When engine speed is up to 3800 RPM, the cutting blade, driven by the
engine via a belt transmission system, begins to rotate at a high speed and is ready for cutting
work.
Shown below are the main parts of the cut-off saw and their corresponding function descriptions
(Ref. Fig. 1):
1. Blade
2. Flanges
3. Hexagon Bolt
4. Blade Guard
5. Front Handle
6. Spark Plug Cover
7. Kill Switch
8. Full Throttle Lock Button
3
2
1
4
5
6
7
8
9
14
13
10
11
12
9. Throttle Trigger
10. Rear Handle
20
11. Filter Cover Lock Lever
16
12. Air Filter
13. Choke Lever
15
17
18
19
14. Starter Grip
15. Fuel Tank Cap
16. Decompression Valve
17. Water Attachment
18. Tensioning Nut
19. Muffler
20. Adjusting Lever of Blade Guard
Fig. 1
1. Blade
Diamond or abrasive blades. Depending on the material to be cut, these blades are made of
different materials. Be sure to choose right blade for the material being cut. The maximum
diameter of the blade for the saw is 14". The operating speed of the blade should be above or
equal to 5300 RPM.
2. Flanges
Clamp and support the diamond or abrasive blade.
3. Hexagon Bolt
Tightens blade flange.
4. Blade Guard
Safety guard directs sparks and dust away from operator.
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5. Front Handle
Used to securely hold the saw while under operation.
6. Spark Plug Cover
A removable cover for access to the spark plug.
7. Kill Switch
Engine stops when this switch is pressed and held.
8. Full Throttle Lock Button
Locks the throttle in full open position by pressing this button while the trigger is fully depressed.
Pressing and releasing the trigger returns the throttle to idle position.
9. Throttle Trigger
Controls engine speed by manipulating the throttle. Pulling the trigger backward opens the
throttle and the engine accelerates. Releasing the trigger slows down the engine.
10. Rear Handle
Used to securely hold the saw while under operation.
11. Filter Cover Lock lever
Locks the air filter cover. Pull back on the lever to open the filter cover.
12. Air Filter
Filters dirt and debris from entering carburetor.
13. Choke Lever
Turning this lever counter clockwise closes the carburetor. Used to prime engine (cold starting).
Turn clockwise for normal operation.
14. Starter Grip
Pull to start engine.
15. Fuel Tank Cap
Open this cap for filling the fuel. Close the tank for starting and operation.
16. Decompression Valve
Press down on this valve to make starting easier. When air pressure in the engine reaches a preset
value, it automatically closes.
17. Water Attachment
Feeds water to both sides of diamond blade. Connect to water supply for wet cutting.
18. Tensioning Nut
For V-belt tension adjustment. Turn this nut clockwise to loosen the V-belt, turn the nut
counterclockwise to tension the V-belt.
19. Muffler
Reduces both noise and emissions.
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20. Blade Guard Adjusting Lever
Allows adjustment of blade guard to direct dust away from operator.
SAFETY PRECAUTIONS:
As the cutoff saw is a high speed power tool, improper use of this saw might be
hazardous. To avoid property damage or personal injury, it is EXTREMELY
IMPORTANT to read, fully understand and observe the following safety
precautions before operating this cutoff saw.
1. Worksite Requirements:
The worksite should be free of any materials or objects that are flammable or
explosive.
Surroundings should be in order, without clutter, have sufficient visibility and be
well ventilated. The flooring the operator stands on should be nonskid. Take extreme care when
working in wet and freezing weather (rain, snow, frost, ice).
Bystanders should keep away from the saw when it is operating. Children, the handicapped and
animals should never be allowed in the work area.
Loose objects may be thrown toward the operator by the cutting tool; position the object to be cut
securely to ensure it can’t be moved by the blade when cutting.
2. Blade:
Before installing a blade, make sure that the maximum operating speed of the blade
is above or equal to the spindle speed of your cutoff saw. Inspect the cutting blade
frequently and replace immediately if the cutting blade is cracked or warped.
Cracked or warped blades may shatter or break and cause serious personal injury.
Failure to follow these directions may cause the blade to shatter or crack in use,
causing serious or fatal injury.
Never use carbide-tipped, woodcutting or circular machine blades. They can cause severe
personal injury from reactive forces, blade contact or thrown objects.
Use of the wrong cutting blade for which it was not designed may cause that blade to shatter,
causing serious or fatal injury. Only use the cutting blade approved for the type of material to be
cut.
Diamond blades have a much better cutting performance than standard abrasive blades. The
blades are steel centered and diamond particles are imbedded in their cutting edges.
Wet or dry cutting is possible. Cutting wet will extend the life of your diamond blades. A water
attachment comes as standard equipment with this cutoff saw. Before using the water attachment,
make sure that the screw that secures the outlet tube is tightened.
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Always install the blade so that the arrow on the blade points in direction of the rotation of the
spindle.
Before carrying or transporting your cutoff saw, make sure the engine is OFF. Never leave the
engine running while unattended (e.g. on the ground).
Proper tension of the V-belt is important. In order to avoid a false setting, the tensioning
procedure must be followed as described in your manual. Always make sure the hexagonal collar
nuts for the cast arm are tightened securely. Check V-belt tension after one hour of operation and
correct if necessary.
3. Operator:
The cutoff saw is a one-person tool. Start and operate this saw without assistance.
Make sure you are in good physical condition and are not under the influence of any substance
such as drugs or alcohol which may impair vision or dexterity. Take breaks as needed to prevent
you from getting fatigued.
Never let the cutoff saw run unattended. NO untrained personal should ever be allowed to use a
cutoff machine. Bystanders, especially children and animals, should not be allowed in the area
where a cutoff machine is in use.
Do not lend or rent your cutoff machine without this Operation Manual. Employers should
establish a training program for operators of this saw to ensure safe operation of this powerful
tool.
Avoid loose-fitting jackets, scarves, neckties, jewelry, flared or cuffed pants, unconfined long
hair or anything that could become caught or entangled on any moving parts of the unit. Wear
overalls or long pants to protect your legs. Do not wear shorts.
Protect your hands with gloves when handing the cutoff saw. Heavy-duty, nonslip gloves
improve your grip and protect your hands.
Operate the cutoff saw with both hands, keeping a firm grip on the front and rear handles.
Maintain good balance and footing at all times.
Good footing is most important. Wear sturdy boots with nonskid soles. Steel-toed safety boots are
recommended.
To reduce the risk of injury to your eyes, never operate the cutoff saw unless
wearing goggles or properly fitted safety glasses with adequate top and side
protection.
Proper eye protection is a must!
Wear an approved safety hard hat to protect your head. Cutoff machine noise could
damage your hearing: Wear earplugs or ear protectors at all times.
Cutting masonry, concrete, metal and other materials can generate dust, mists and
fumes containing chemicals known to cause serious or fatal injury or illness, such as
respiratory disease, cancer, birth defects or other reproductive harm.
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Cutting masonry, concrete and other materials with silica in their composition may give off dust
containing crystalline silica. Silica is a basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Use of an approved respirator is recommended.
Do not cut materials containing asbestos, as asbestos dust can cause severe physical injury. Do
not cut materials containing highly volatile or flammable substances.
4. Inspection of the cutoff saw before use:
1. Make sure there are no loose objects on or near the saw.
2. Except for the carburetor adjustment screws, all other bolts, nuts, screws and the fuel tank cap
should be securely tightened. Make sure all rubber hoses for oil flow are tightly connected with
no leaks.
3. Make sure the blade rotates smoothly; the starter rope can be pulled through and guided back
without being tangled.
4. Check to make sure the Throttle Trigger, the Full Throttle Lock Button, the Choke Lever, the
Decompression Valve and the Kill Switch all function well without failure.
5. Check to make sure the blade guard has no visual damage. Adjust the guard as necessary so the
spark beam generated during cutting can be directed
away from the operator (Ref. Fig. 2).
6. Check to make sure the V-belt is properly tensioned.
7. Make sure the saw is free of oil spillage.
8. Make sure the main cover and the handles are dry
and clean.
9. Do not attempt to start the saw if damage is found or
if it’s not completely and securely assembled and
properly adjusted.
Fig. 2
5. Precautions on starting:
1. Keep a good balance and secure footing.
2. Take hold of the starter grip firmly; do not wrap the rope
around your hand.
3. To start, place the machine firmly against the ground and
make sure the blade is not in contact with the ground or the
object to be cut.
4. Pull sharply on the rope and guide it back slowly. Do not
let go of the grip halfway through
the pull to prevent it from snapping back.
Fig. 3
6. Precautions on operation:
1. Keep a good balance and secure footing while holding the saw firmly at all times.
(Ref. Fig. 3)
2. Press the throttle trigger backward slowly to make the engine accelerate gradually. Wait until
the blade builds up the RPMs before beginning to work.
3. Move the rotating blade slowly toward the object to be cut, increase the pressure gradually
after the cutting edge comes in contact with the object. Make sure the cutting depth is appropriate.
4. Do not change direction of the cut or twist during the cut as this may produce a high
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