Janser COSMO II User manual

COSMO II
Stripping Machine
Subfloor Treatment
INSTRUCTION MANUAL
Order-No. 111 820 000
Janser GmbH
Machines, Tools
Work Clothing
E-mail: [e-mail]
Internet: www.janser.com
Böblinger Street 91
71139 Ehningen
GE MANY
Phone +49 / 7034 / 127-0
Fax +49 / 7034 / 8838
. . . offer the wide t range of equipment for interior
outfitter flooring in taller and floorcovering retailer

Page 2
TABLE OF CONTENTS
Rules for Safe Operation..........................................................................................3-6
A. Grounding ............................................................................................................5
B. Extension Cords ..................................................................................................6
General Operation..................................................................................................7-10
A. Specifications ......................................................................................................7
B. Assembly..............................................................................................................7
C. Wheel Adjustment ................................................................................................8
D. Handle Adjustment ..............................................................................................9
E. Machine Operation ..............................................................................................9
F. Machine Start Up Procedure ................................................................................9
G. User General Information................................................................................9-10
H. Transportation ....................................................................................................10
Blades ..................................................................................................................11-16
A. Blade Changing ..................................................................................................11
B. Blade Setting ................................................................................................11-12
C. Types of Tearouts..........................................................................................13-14
D. Blade Diagram....................................................................................................15
E. Blade Chart ........................................................................................................16
Maintenance ..............................................................................................................17
A. Maintaining Equipment ......................................................................................17
B. Cleaning ............................................................................................................17
C. Repairs ..............................................................................................................17
Troubleshooting ........................................................................................................18
Complete Parts List ..............................................................................................19-20
Part Numbers and Diagrams................................................................................21-22
A. External Parts ....................................................................................................21
B. Internal Parts ......................................................................................................22





Page 3
RULES FOR SAFE OPERATION
READ AND SAVE ALL INSTRUCTIONS FOR FUTURE USE. Before use, be sure everyone operating this
equipment reads and understands this manual as well as any labels packaged with or attached to the tool.
. KNOW YOUR POWER TOOL: Read this manual carefully to learn your equipment's applications and
limitations as well as potential hazards associated with this type of equipment.
2. GROUND YOUR TOOL: Unless your tool is double insulated, it should be grounded. See Grounding.
3. AVOID DANGEROUS ENVIRONMENTS: Do not use in rain, damp or wet locations, or in the
presence of explosive atmospheres (gaseous fumes, dust or flammable materials). Remove materials
or debris that may be ignited by sparks.
4. KEEP WORK AREA CLEAN AND WELL LIT: Cluttered, dark work areas invite accidents.
5. DRESS PROPERLY: Do not wear loose clothing.These may be caught in moving parts. When
working outdoors, wear rubber gloves and insulated non-skid footwear. Keep hands and gloves away
from moving parts.
6. USE SAFETY EQUIPMENT: Everyone in the work area should wear safety goggles or glasses
complying with current safety standards. Wear hearing protection during extended use and a dust
mask for dusty operations. Hard hats, face shields, safety shoes, etc. should be worn when specified
or necessary.
7. KEEP BYSTANDERS AWAY: Children and bystanders should be kept at a safe distance from the
work area to avoid distracting the operator and contacting the tool or extension cord. Operator should
be aware of who is around them and their proximity.
8. PROTECT OTHERS IN THE WORK AREA: Provide barriers or shields as needed, to protect others
from debris.
9. USE PROPER ACCESSORIES: Using accessories that are not recommended may be hazardous.
Be sure accessories are properly installed and maintained. Do not delete a guard or other safety
device when installing an accessory or attachment.
0. CHECK FOR DAMAGED PARTS: Inspect guards and other parts before use. Check for
misalignment, binding of moving parts, improper mounting, broken parts and any other conditions that
may affect operation. If abnormal noise or vibration occurs, turn the tool off immediately and have the
problem corrected before further use. Do not use a damaged tool. Tag damaged tools “DO NOT
USE” until repaired. A guard or other damaged parts should be properly repaired or replaced. For all
repairs, insist on only identical National replacement parts.
. REMOVE ALL ADJUSTING KEYS AND WRENCHES: Make a habit of checking that the adjusting
keys, wrenches, etc. are removed from the tool before turning it on.
2. GUARD AGAINST ELECTRIC SHOCK: Prevent body contact with grounded surfaces such as pipes,
radiators, ranges and refrigerators. When making cuts, always check the work area for hidden wires
or pipes. Hold your tool by insulated nonmetal grasping surfaces. Use a Ground Fault Circuit
Interrupter (GFCI) to reduce shock hazards.
3. AVOID ACCIDENTAL STARTING: Be sure machine is turned off before plugging it in. Do not use a
machine if the power switch does not turn the tool on and off.
WARNING: When using electric tools, always follow basic safety precautions to reduce the risk of
electric shock and personal injury.

Page 4
RULES FOR SAFE OPERATION
4. DO NOT FORCE : Machine will perform best at the rate for which it was designed. Excessive force
only causes operator fatigue, increased wear and reduced control.
5. KEEP HANDS AWAY FROM ALL CUTTING EDGES AND MOVING PARTS.
6. WEAR GLOVES WHEN CHANGING BLADES.
7. DO NOT ABUSE CORD: Never unplug by yanking the cord from the outlet. Pull plug rather than cord
to reduce the risk of damage. Keep the cord away from heat, oil, sharp objects, cutting edges and
moving parts.
8. DO NOT OVERREACH. MAINTAIN CONTROL: Keep proper footing and balance at all times.
Maintain a firm grip.
9. STAY ALERT: Watch what you are doing, and use common sense. Do not use a tool when you are
tired, distracted or under the influence of drugs, alcohol or any medication causing decreased control.
20. STARTING MACHINE: On/off switch must be in off position before connecting to power source.
2 . UNPLUG TOOL: When it is not in use, unplug tool before changing accessories or performing
recommended maintenance.
22. MAINTAIN TOOLS CAREFULLY: Keep handles dry, clean and free from oil and grease. Keep
cutting edges sharp and clean. Follow instructions for lubricating and changing accessories.
Periodically inspect tool cords and extension cords for damage. Have damaged parts repaired or
replaced.
23. STORE IDLE TOOLS: When not in use, store your tool in a dry, secured place. Keep out of reach
of children.
24. MAINTAIN LABELS AND NAMEPLATES: These carry important information. If unreadable or
missing, contact National for a free replacement.
25. MACHINE IS HEAVY, DO NOT DROP: Counter weights are heavy. Take caution when removing
or reassembling.
WARNING: Exposure to dust may cause respiratory ailments. Use approved NIOSH or OSHA
respirators, safety glasses or face shields, gloves and protective clothing. Provide adequate ventilation
to eliminate dust, or to maintain dust level below the Threshold Limit Value for nuisance dust as
classified by OSHA.

Page 5
RULES FOR SAFE OPERATION
GROUNDED TOOLS: TOOLS WITH THREE PRONG PLUGS
Tools marked “Grounding Required” have a three wire cord and three prong grounding plug. The plug
must be connected to a properly grounded outlet. See Figure A. If the tool should electrically malfunction
or break down, grounding provides a low resistance path to carry electricity away from the user, reducing
the risk of electric shock.
The grounding prong in the plug is connected through the green wire inside the cord to the grounding
system in the tool. The green wire in the cord must be the only wire connected to the tool's grounding
system and must never be attached to an electrically “live” terminal.
Your tool must be plugged into an appropriate outlet, properly installed and grounded in accordance with
all codes and ordinances. The plug and outlet should look like those in Figure A.
Figure B illustrates a temporary adapter available for connecting grounded plugs (Figure A) to two prong
outlets. The green rigid ear or lug extending from the adapter must be connected to a permanent ground
such as a properly grounded outlet box or receptacle. Simply remove the center screw from the outlet,
insert the adapter and reattach the screw through the green grounding ear to the outlet. If in doubt of
proper grounding, call a qualified electrician. A temporary adapter should only be used until a properly
grounded outlet can be installed by a qualified electrician. The Canadian Electrical Code prohibits the use
of temporary adapters.
Figure A
2
1
3
6
GROUNDING
1. Cover of grounded outlet box
2. Outlet ground
3. Grounding prong
4. Temporary adapter
5. Screw
6. Green grounding ear
4
5
Figure B
WARNING: Electrical cords can be hazardous. Misuse can result in fire or death by electrical
shock. Read carefully and follow all directions.
WARNING: Improperly connecting the grounding wire can result in the risk of electric shock.
Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. Do
not modify the plug provided with the tool. Never remove the grounding prong from the plug. Do not
use the tool if the cord or plug is damaged. If the plug will not fit the outlet, have a proper outlet
installed by a qualified electrician.

Page 6
RULES FOR SAFE OPERATION
EXTENSION CORDS
Grounded tools require a three wire extension cord. Double insulated tools can use either a two or three
wire extension cord. As the distance from the supply outlet increases, you must use a heavier gauge
extension cord. Using extension cords with inadequately sized wire causes a serious drop in voltage,
resulting in loss of power and possible tool damage.
The smaller the gauge number of the wire, the greater the capacity of the cord. For example, a 14 gauge
cord can carry a higher current than a 16 gauge cord. When using more than one extension cord to make
up the total length, be sure each cord contains at least the minimum wire size required. If you are using
one extension cord for more than one tool, add the nameplate amperes and use the sum to determine the
required minimum wire size.
GUIDELINES FOR USING EXTENSION CORDS
• If you are using an extension cord outdoors, make sure it is marked with the suffix “W-A” (“W” in
Canada) to indicate that it is acceptable for outdoor use.
• Be sure your extension cord is properly wired and in good electrical condition. Always replace a
damaged extension cord or have it repaired by a qualified person before using it.
• Protect your extension cords from sharp objects, excessive heat and damp or wet areas.
• Keep away from water. Do not use if wet.
• Inspect thoroughly before each use. DO NOT USE IF DAMAGED.
• Make sure equipment is OFF before connecting cord outlet.
• FULLY INSERT plug into outlet.
• Do not remove, bend or modify any metal prongs or pins of cord.
• Do not use excessive force to make connections.
• Do not connect a three prong plug to a two-hole cord.
• Avoid overheating. Uncoil cord and do not cover it with any material.
• Do not walk on cord.
• Do not drive, drag or place objects over cord.
READ AND SAVE ALL INSTRUCTIONS FOR FUTURE REFERENCE.
WARNING: Electrical cords can be hazardous. Misuse can result in fire or death by electrical
shock. Read carefully and follow all directions.

Page 7
GENERAL OPERATION
ASSEMBLY
THE MACHINE COMES DISASSEMBLED.
1. Slide switch onto handle legs with switch to the front of the handle (See Figure A).
2. Loosen both handle T-bolts on the handle frame.
3. Insert handle into handle frame (See Figure A) and adjust the handle to the desired height.
4. Retighten T-bolts on the handle frame (See Figure A).
5. Slide switch upward (See Figure B).
6. Tighten switch box T-bolts (See Figure B).
Figure A Figure B
Handle
T-Bolt
Slide switch
onto handle
legs
Insert handle
into handle
frame
Handle
T-Bolt
Switch Box
T-Bolt
CAUTION: Loosen switch and bolts before trying to remove the handle.
SPECIFICATIONS #550
Length: 24''
Width: 12''
Height: • 43'' w/ handle
• 2 '' w/o handle
Weight (machine only): 119 lbs.
Speed: Manual
MOTOR INFORMATION
RPM: 1725
Volts: 115
HP: 1
Amps-Full Load: Under 1
Continuous Duty
SPECIFICATIONS

Page 8
WARNING: Do not operate machine around excessive moisture areas, such as abatement work
and flooded pool areas. Always use a GFI wall outlet or plug (stock #53 Circuit Guard is
recommended). Failure to do so could cause damage in machine or injury to operator.
GENERAL OPERATION
WHEEL ADJUSTMENT
Adjusting wheel angle will change the blade angle to the floor. A steep wheel angle is recommended on
hard tear-outs such as tile over concrete. A low wheel angle is recommended for vinyl removal over
plywood floors. These are estimations. Experiment with the angle to see what works the best for the jobs
application.
Rotate handle clockwise to raise wheels, counterclockwise to lower wheels to the desired blade angle
(See Figure A).
NOTE: Adjustment by trial at the beginning of a job will allow optimum performance.
Figure A
Angle Adjustment
Wheel

Page 9
GENERAL OPERATION
HANDLE ADJUSTMENT
AFTER THE PROPER WHEEL ADJUSTMENT IS ACHIEVED, ADJUST HANDLE
No matter what the wheel angle is set at, the handle should be
adjusted to the "belt-line" of the operator or to what the operator is
comfortable with (See Figure A).
- Low setting works best on soft sub floors, plywood, luan,
particleboard and wafer board.
- In some cases, a higher setting works best on direct glued
down carpet, vinyl or tile on concrete in some cases.
Make certain handle and bolts are secured tightly.
NOTE: Adjustment by trial at the beginning of a job will allow optimum
performance.
MACHINE OPERATION
A well maintained machine is a productive machine. If not properly
maintained, it could be unsafe and could break down. A scheduled maintenance program should insure a
long system life and a safe work environment.
MACHINE START PROCEDURE
TO RUN MACHINE:
1. Machine MUST be off before plugging machine into power source.
2. Plug machine into extension cord and/or outlet.
3. Turn switch to on.
USER GENERAL INFORMATION
1. Always wear eye protection
2. Keep flammable and fragile objects away from this tool.
3. Always check nuts and bolt to make sure they are tight.
4. Always use the machine with proper voltage specified in the machines nameplate.
5. Do not operate around water or wet conditions without use of GFI on cord (stock #53 Circuit Guard).
6. Use properly grounded cord and receptacle.
7. Unplug from power before servicing or changing blades.
8. Use 12-3 or heavier wire cord, not exceeding 5 feet in length.
9. Do not force machine.
1 . Do not alter machine.
11. Keep wheels free from debris.
12. Make sure blade is sharp.
Figure A

Page 10
USER GENERAL INFORMATION (continued)
12. Dropping machine onto cutting head could cause damage to blade holder or blade and cause undue
wear on bearing surface.
13. Removable handle and front weight makes machine portable (fits in a trunk of a car).
14. Do Not leave machine unattended while machine is running or plugged in.
TRANSPORTATION
Always remove counterweight and blades before loading or unloading.
Machine breaks down for easy transportation:
- Handle removes
- Handle and/or wheel angle can be lowered
- Remove blade when not in use or transporting machine.
- Blades are sharp, use caution when handling blade.
GENERAL OPERATION
WARNING: Keep hands and feet out from under machine.
WARNING: Stay clear of blade when machine is operating.

Page 11
BLADE CHANGING
• Dull blades greatly reduce cutting ability. Re-sharpen or replace as
needed.
• Proper blade size and placement per job type greatly affects
performance.
• Disconnect electrical power first.
• Do not lean machine back onto handle.
• Always wear gloves when changing blades to protect fingers and
hands.
1. Place a block under front of machine as shown in diagram, raising
blade holder (See Figure A).
2. Use extended socket wrench that comes with Panther or a socket wrench with at least a 3'' extension
to keep hand safely away from the sharp edge of the blade.
3. Loosen two blade cover bolts with extended wrench. It is not necessary to remove bolts.
4. Place blade into cutting head, sliding all the way back to the bolts. If the blade is wider than the
cutting head, center blade to head. If blade is smaller than the cutting head, first pass blade should be
mounted in center of the cutting head. After first pass is made, blade can be offset in head to allow
wheels to keep even contact with the floor and allow easy access to the wall. Blades of longer width
can be mounted in either holes or slots or put in front of blade cover bolts.
5. Securely tighten bolts.
• Blades are extremely sharp, use caution.
• A new sharp blade being used on wood or alike sub floors may work better when slightly dulled to avoid
digging or gouging.
• Use National Carpet Equipment replacement blades.
BLADE SETTING
• Dull blades greatly reduce cutting ability. Re-sharpen or replace as needed.
• Proper blade size and placement, depending on material and sub-floor type, affects performance.
• The harder a job comes up, for best results, use a smaller blade.
• Start with a narrow blade, then increase blade size to optimize cutting pass. Narrower blades work
easier than wider blades and usually clean the floor better. Wider is not always better or faster.
• Normally bevel on blade is up for concrete. Bevel down for wood or soft sub-floors.
BLADES
CAUTION: Blades are sharp. Handle with care. Failure to do so could cause bodily injury.
Figure A

Page 12
BLADES
Figure C
Figure A
Figure B
• Wood or wood like floors: pound down or remove any nails or metal obstruction to avoid blade damage.
• Blades can be offset in cutting head for easier access to toe kicks or removal along the wall
(See Figure A).
• Sheet vinyl, solid vinyl, rubber tile, urethane or PVC sheet roofing, will need to be scored for best
removal results. Nationals #584 Scoring Tool (See Figure B).
• On direct glued down carpet, the carpet should be scored to blade width for optimum ease of use
(See Figure C).
• Self scoring blades are available in a number of sizes. These blades eliminate the need for pre-scoring
material. The 5'' x 6'' blade is recommended. Do not go larger than a 3'' x 12'' blade. Depending upon
the type of material being removed and the sharpness of the blade and scoring wings, the self scoring
blades may make it harder to control or push the machine (pre-scoring is a better method).
• Keep scoring wings sharp at all times.
• Keep in mind, narrow width blades will make a cleaner floor surface.
• When working over plywood sub-floor, try to work in a 45° direction to the grain of the wood.
• When working over concrete, beware of expansion joints and floor mounted receptacles.
• Proper blade size and placement, depending on material and floor type, greatly affects performance.
(The harder a job comes up, the smaller the blade for ease of use.)
•KEEP BLADES SHARP!
• Dull blades greatly affect the performance of the machine.
• Keep your work area clean and clear of debris.
• After you have removed a portion of material, clear it out of the way. This will give the machine
maximum performance and help to keep the work area safe.
BLADE SETTING (continued)

Page 13
BLADES
Figure A Figure B
Figure E
TYPES OF TEAROUTS
REMOVAL MATERIALS
• VCT TILE: Never use a blade wider than the size of the tile being removed (See Figure A). If goods
being removed still do not come up clean or machine jumps on top of goods, reduce blade size to a
smaller blade until proper blade size is found or use a smaller portion of the blade. The most common
blade sizes when removing tile are a 4'' x 6'' or a 5'' x 6'', but a 3'' x 1 '' works in some cases.
• PURE VINYL RUBBER TILE: Goods will need to be scored to the size of the blade being used (See
Figure B). Self scoring blades can be used with some materials. A 1 " blade is recommended for this
product, but determine what size blade works best.
• HARD TO REMOVE SURFACES: Ripper teeth can be used on hard to remove goods (Hardwood &
VCT) (See Figure E).
• DIRECT GLUED CARPET: Can be done with either self scoring blades (Figure C) or pre-score carpet
to blade width prior to stripping with #584 Scoring Tool. Pre-scored carpet makes machine easier to
control and blades stay sharper longer. Blades up to 16" wide can be used. Normally 5" to 1 " blades
are used on direct glued carpet, secondary backed, unitary, double glued, vinyl foam, urethane foam.
Rubber back & latex foams usually come up easily with a 16" blade. If using a self-scoring blade, they
must be kept sharp.
•CERAMIC: Requires a Ceramic Blade Cover and a ceramic bit (See Figure D). Ceramic over a wood
sub-floor requires a low angle so the blade is flat to the floor. Ceramic over hard sub-floor such as
concrete, angle can be increased. Experiment with the angle to see which works the best. Clear debris
from area as it is removed.
Figure C
WARNING: Never remove flooring containing asbestos without fully understanding proper state
and federal procedures and guidelines. Wear safety glasses.
Ripper Teeth
Self Scoring Blade
Figure D

Page 14
BLADES
TYPES OF TEAROUTS (continued)
SUBFLOOR SURFACES
• WOOD: When working over plywood sub-flooring, try to run machine in a 45° angle to the grain in the
wood. Blade in most cases should be bevel down. On solid wood floors, like plank, run 45° to the
plank, not cross grain or cross plank. Removing the front counter weight will help on all soft surfaces.
Rounding off the corners of the blade will help from digging into the floor.
• CONCRETE: When working on a concrete slab, normal blade position
is bevel up for best performance, especially when cleaning adhesive. On
occasion, bevel down gives better blade life. Test each job for best
performance.
• GIBCRETE AND SOFT POURED FLOORING: Usually requires blade
bevel down to create a better wearing surface, although bevel up may work if
front counter weight is removed.
EYE PROTECTION SHOULD BE USED AT ALL TIMES.
• GLUED HARD WOOD FLOORING: A 6" blade is recommended for regular adhesive. For proper
removal of hardwood flooring (parkay laminated, plank laminated, plank solid) flooring must be scored.
This is done by using a circular saw set at a depth of 1 % of the thickness of the board, just missing
the subfloor surface when on concrete (See Figure A). A chalk line for scoring lines can be used
across the floor the width of the blade (See Figure B). A ripping guide attached to the saw can be used
to eliminate chalk line marks. Open an area large enough to fit machine or start from a doorway. It is
important to keep all debris cleaned up for maximum performance of machine. True Parkay flooring
scoring is not necessary. It will come up in small pieces.
Figure B
Figure A
CAUTION: Beware of expansion joints and floor mounted receptacles or other obstacles in the floor.

Page 15
#502 Ripper Teeth
For difficult surfaces;
ceramic, hardwood, heavy
tile, etc.
BLADES
WARNING: Never remove flooring containing asbestos without fully understanding proper
state and federal procedures and guidelines for removal of these products. Laws are different
from state to state.
.062
Blade Support
Blade with Slots
Standard Extra Heavy Duty
Heavy Duty
Double Edge
.094
.062
.250
.062
Sharp
Sharp
Self-Scoring
Corner
Self Scoring
Extra Heavy Duty
Premium High
empered
.187
.062
BLADE DIAGRAM
CAUTION: Blades are sharp.
Double Ground Stripper
*Add s mbol “D” to stock number for double ground.
End View Both Edges Sharpened
#55
#552
Angle shank
attachments for hard to
remove materials such
as wood, ceramic and
epox coatings

Page 16
Part # Description Application Thickness
#130-S 3'' x 10'' Blade with slots Glued down carpet, tile or resilient .062
#130-D #130 Blade with both edges sharpened Carpet, tile or resilient on wood & concrete floors .062
#131-S 3'' x 16'' Blade with slots Glued down rubber carpet, floor accumulation .062
#135 5" x 16" Blade Rubber back carpet on wood or concrete floors, excellent for .062
cleanup and longer durabilit .
#147 4" x 6" Blade Tile or linoleum on concrete floors .062
#147-D #147 Blade with both edges sharpened Tile or linoleum on concrete floors .062
#148 5" x 6" Blade Tile or linoleum on wood floors .062
#148-D #148 Blade with both edges sharpened Tile or linoleum on wood floors .062
#502 Panther®Ripper Teeth Difficult surfaces: ceramic, hardwood, heav tile etc.
#552 Angle Shank Ceramic
#6255-BU 4" x 6" Self Scoring Blade - Bevel Up .062
#6257-BU 3" x 9" Self Scoring Blade - Bevel Up .062
#6281 3'' x 8'' Heav Dut Blade .094
#6282 3'' x 14'' Heav Dut Blade .094
#6284 3'' x 12'' Heav Dut Blade .094
#6285 3'' x 6'' Heav Dut Blade .094
#6286 3'' x 10'' Heav Dut Blade .094
#6290 3'' x 6'' Extra Heav Dut Blade .187
#6291 3'' x 8'' Extra Heav Dut Blade .187
#6292 3'' x 12'' Extra Heav Dut Blade .187
#6293 3'' x 14'' Extra Heav Dut Blade .187
#7050-200 3'' x 6'' Premium High Tempered Blade .062
#7050-201 3'' x 8'' Premium High Tempered Blade .062
#7050-202 3'' x 10'' Premium High Tempered Blade .062
#7050-203 3'' x 12'' Premium High Tempered Blade .062
#7050-204 3'' x 14'' Premium High Tempered Blade .062
#7080 3'' x 8'' Increased Angle Blade .062
#7081 3'' x 10'' Increased Angle Blade .062
Extremel hard, high abrasion allo for tough tear-up situations.
Vct, Vat, wood, tile, thin ceramic, re-scraping thin-set, all carpets,
cork, elastomeric coatings, re-scraping rubber and urethane
coatings. Holds the edge extremel well.
Ultra high qualit spring steel is extra hard for long blade life
between sharpening. Works on all glue down carpets, Vct, Vat,
rubber tile, cork, re-scraping adhesive, elastomeric coatings. Great
for floor accumulations.
Works on attached cushion, Unitar or secondar backing, vin l
backing, soft to medium Pvc, linoleum, carpet tiles, soft cork,
Enhancer and Uniband hot melts.
A heav dut blade that still gives a little flex. Made with Nationals
proven blade hardening process, these blades will sta sharper
longer with better overall performance than an other blade on the
market. Works on wood, Vct, Vat, tile, rubber epox , thin-set,
elastomeric coatings, scraping thin-set, glued ceramic.
BLADES
Mainl used for VCT, but can be used on most other applications.
Supplies more of an angle when angle is needed. Prevents
machine from jumping off material.

Page 17
MAINTAINING EQUIPMENT
Keep equipment in good repair by adopting a regular maintenance program. Before use, examine the
general condition of equipment. Inspect guards, switches, tool cord set and extension cord for damage.
Check for loose screws, misalignment, binding of moving parts, improper mounting, broken parts and any
other condition that may affect its safe operation. If abnormal noise or vibration occurs, turn the tool off
immediately and have the problem corrected before further use. Do not use a damaged tool. Tag
damaged tools “DO NOT USE” until repaired. See Repairs.
• Mechanical inspection
• Cleaning (pulleys, spindles, bearings, housing, etc.)
• Electrical inspection (switch, cord, plugs, etc.)
• Testing to assure proper mechanical and electrical operation
• Check nuts on shock absorbers and bottom plate for tightness
• Check screws on bottom bearing for tightness
• Check all screws and fittings for a tight and secure fit
• Keep a sharp blade in machine for optimum performance
• Remove blade when machine is not in use.
CLEANING
Clean dust and debris from vents. Keep the Equipment handle clean, dry and free
of oil or grease. Use only mild soap and a damp cloth to clean since certain
cleaning agents and solvents are harmful to plastics and other insulated parts.
Some of these include: gasoline, turpentine, lacquer thinner, paint thinner,
chlorinated cleaning solvents, ammonia and household detergents containing
ammonia. Never use flammable or combustible solvents around tools.
Machine is pressure washable. Motor, motor junction box, capacitor box
and switch are protected from splashes of water but CAN NOT be subjected
to jets of high pressure. Thoroughly dry machine before use. Do not use
machine when wet or damp.
REPAIRS
If your tool is damaged, contact National for a return authorization number and return the entire tool.
• Shipments are not accepted without a return authorization number.
• COD or freight collect shipments will not be accepted.
WARNING: To reduce the risk of injury, electric shock and damage to the tool, never immerse
your tool in liquid or allow a liquid to flow inside the tool.
WARNING: To reduce the risk of injury, always unplug equipment from power source before
performing any maintenance. Never disassemble the tool or try to do any rewiring on the tool’s
electrical system. Failure to do so could cause damage to machine or serious injury. Contact National
for ALL repairs.
MAINTENANCE
Completely avoid jets of high
pressure on motor and switch

Page 18
THERE IS NO POWER
1. Inspect the electrical cord, switch and/or if the circuit breaker tripped.
MOTOR NOISE
1. Make sure fan guard is not bent.
RATTLING
1. Tighten loose nuts and bolts.
MACHINE IS HARD TO HANDLE
1. Remove the counterweight.
2. Change to a smaller blade.
3. Sharpen blade.
BLOWS FUSES OR CIRCUIT BREAKERS
1. Check and/or change attached power cord. Use a 12 gauge or heavier cord, 5 ' or less.
2. Move to a different outlet or a better circuit.
SHANK INSERTION
If it is difficult to insert a shank into the holder, remove the paint from the shaft of the shank by using
sandpaper, emery cloth or a solvent.
TROUBLESHOOTING

Note: Number in parenthesis ( ) is the
amount needed on each machine. Parts
are sold individually therefore order the
number of parts needed.