National Flooring Equipment PANTHER 5280 User manual

#5280 HYDRAULIC
PANTHER®
INSTRUCTION MANUAL
Read Manual Before Operating Machine
9250 XYLON AVENUE NORTH • MINNEAPOLIS, MN 55445 • U.S.A.
800-245-0267 • 763-535-8206 • FAX [phone] • FAX [phone]
WEB SITE: www.nationalequipment.com • E-MAIL: [email protected]
National
Flooring Equipment, Inc.

Page 2
5280 TABLE OF CONTENTS
Table of Contents ..................................................................................................2-2.1
Hydraulic ................................................................................................................3-4
A. Maintaining A Safe Work Environment ................................................................3
B. Pressure............................................................................................................3-4
C. Flammability ........................................................................................................4
D. Hydraulic Fluid......................................................................................................4
Rules for Safe Operation..........................................................................................5-8
A. Grounding ............................................................................................................7
B. Extension Cords ..................................................................................................8
General Operation..................................................................................................9-10
A. Specifications ......................................................................................................9
B. Machine Start-up Procedure ................................................................................9
C. Maintenance ......................................................................................................10
D. Inspection Procedure Hydraulic Preventive Maintenance Checklist ..................10
Transportation ......................................................................................................11-12
A. Loading ..............................................................................................................11
B. Unloading ..........................................................................................................12
Blades ..................................................................................................................13-17
A. Blade Setting ................................................................................................13-14
B. Blade Changing..................................................................................................14
C. Blade Sharpening ..............................................................................................15
D. Blades ..............................................................................................................16
E. Blade Chart ........................................................................................................17
Procedures ..........................................................................................................18-20
A. Front Weight ......................................................................................................18
B. Wheel Cleaner Adjustment ................................................................................18
C. Wheel Removal..................................................................................................18
D. Inspection of Internal Parts ................................................................................18
E. Speed Control & Speed Control Replacement ..................................................19
F. Pressure Valve Replacement ............................................................................19
G. Forward Switch Replacement ............................................................................19
H. Power Cord ........................................................................................................19
I . Checking & Changing Hydraulic Fluid................................................................20
J. Tank Removal ....................................................................................................20
Troubleshooting ........................................................................................................21

Page 2.1
5280 TABLE OF CONTENTS
Wiring Diagram ....................................................................................................22-23
Hydraulic Line Layout Diagram ................................................................................24
Complete Parts List ..............................................................................................25-28
Part Numbers and Diagrams................................................................................29-34
Labels ........................................................................................................................35
Accessories ..............................................................................................................36
Material Safety Data ............................................................................................37-42
Guarantee..................................................................................................................43
Return Sheet ............................................................................................................44
Blade Order Form..........................................................................................................

Page 3
MAINTAINING A SAFE WORK ENVIRONMENT
Establishing a safe working environment in and around your hydraulic equipment is just common sense.
The easiest and most effective way to avoid problems is to make sure associates understand their
equipment, know how to operate it safely and recognize the danger it represents if handled carelessly. A
few things you must be aware of include:
1. PRESSURE: Hydraulic fluid under pressure is dangerous and can cause serious injury.
2. FLAMMABILITY: When ignited, some hydraulic fluids can explode and/or cause fires.
3. MECHANICAL: Hydraulic fluid creates movement, which causes parts of your equipment to move or
rotate. Always be aware of what you are doing.
4. MOISTURE: Never operate in wet or high moisture conditions without a proper GFI grounded switch.
Make sure all electrical fittings, switches, cords plus stain reliefs are in good condition. Always unplug
when not in use and when doing any service work.
5. ELECTRICAL: Disconnect power before servicing. Unplug cord so it can’t be started. Faulty wiring
can also be an electrical hazard. A regular preventive maintenance program should always include a
wiring check.
6. TEMPERATURE: Because this machine operates at a relatively low pressure, overheating is not
common. If surface of tank becomes too hot to touch by hand (above 130º), shut off machine and
allow to cool off.
PRESSURE
Our system runs at or below 1,200 psi. Never look for a leak when unit is under pressure. Using your
hand could cause serious injury. A few common ways to encounter hydraulic fluid under pressure include:
1. PINHOLE: Fluid under pressure can cause serious injury. It can be almost invisible escaping from a
pinhole, and it can pierce the skin into the body. Do not touch a pressurized hydraulic hose
assembly with any part of your body. If fluid punctures the skin, even if no pain is felt, a serious
emergency exists. Obtain medical assistance immediately. Failure to do so can result in loss of the
injured part or death.
2. LEAK: Keep fittings and hoses tight. Only check and service when not under pressure. Leaking
hydraulic fluid is not only unsightly, it’s hazardous. In addition to making workplace floors slippery and
dangerous, leaks also contaminate the environment. Before cleaning an oil spill, always check EPA,
state and local regulations.
LEAK AT THREAD END/SEAT
Problem: Coupling leaks at thread or seat. This may be caused by any of the following:
a. Missing or damaged O-rings.
b. Damaged threads or seat angle.
c. Thread alignment.
d. Incompatible thread ends or seat angles.
e. Over or undertorquing.
Solution: Remove the connection and inspect.
1. Certain couplings require the use of an O-ring. If it is missing, replace it. If an O-ring is used,
check for damage caused by installation or possible material breakdown from heat or fluid
incompatibility. Alternative O-ring materials may be required. Replace if necessary.
5280 HYDRAULIC SAFE OPERATION

Page 4
5280 HYDRAULIC SAFE OPERATION
PRESSURE (continued)
2. Check the threads and/or seat angle for damage that may have occurred prior to or during
installation. Any ding or burr may be a potential leak path. Replace if necessary.
3. If the coupling was misaligned during installation, threads may have been damaged. Replace
and carefully install.
4. Overtorquing of a threaded connection can stretch and damage threads and mating seat
angles. Overtorquing can also damage the staking area of the nut. Undertorquing does not
allow proper sealing.
3. BURST: Whether due to improper selection or damage, a ruptured hose can cause injury. If it bursts,
a worker can be burned, cut, injected or may slip and fall.
4. COUPLING BLOW-OFF: If the assembly is not properly made or installed, the coupling could come
off and hit or spray a worker, possibly resulting in serious injury. Never operate machine without
guards.
FLAMMABILITY
With the exception of those comprised primarily of water, all hydraulic fluid is flammable when exposed to
the proper conditions (including many “fire-resistant” hydraulic fluids).
Leaking pressurized hydraulic fluids may develop a mist or fine spray that can flash or explode upon contact
with a cause of ignition. These explosions can be very severe and could result in serious injury or death.
Precautions should be taken to eliminate all ignition sources from contact with escaping fluids, sprays or
mists resulting from hydraulic failures. Sources of ignition could be electrical discharges (sparks), open
flames, extremely high temperatures, sparks caused by metal-to-metal contact, etc.
HYDRAULIC FLUID
Only use Texaco Rando 46 Hydraulic Oil or Compatible Fluid like IS032 (stock # 6280-1). Non-compatible
fluids could cause damage to unit or serious injury.
CAUTION: Never check for leaks over hose or hydraulic connections. Instead, use a piece of
cardboard to locate a pressurized leak. For drips (low pressure leaks), use a rag to clean the area and
determine where the leak originates.
CAUTION: Never touch a pressurized hose assembly. Shut down the hydraulic system before
checking hose temperature.
WARNING: When using electric tools, always follow basic safety precautions to reduce the risk of
electric shock and personal injury.

Page 5
5280 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 machine and components and view the instruction video. Extra copies of the manual and
video are available upon request.
1. KNOW YOUR EQUIPMENT: Read this manual and view instruction video carefully to learn
equipment applications and limitations as well as potential hazards associated with this type of
equipment.
2. GROUND YOUR TOOL: 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 and machine operation.
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.
10. 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 damaged equipment. 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 replacement parts.
11. 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.
12. GUARD AGAINST ELECTRIC SHOCK: Prevent body contact with grounded surfaces such as pipes,
radiators, ranges and refrigerators. When scoring or making cuts, always check the work area for
hidden wires or pipes. Use a Ground Fault Circuit Interrupter (GFCI) to reduce shock hazards.
13. AVOID ACCIDENTAL STARTING: Be sure equipment is turned off before plugging it in. Do not use
if the power switch does not turn the machine on and off.
14. DO NOT FORCE EQUIPMENT: Equipment will perform best at the rate for which it was designed.
Excessive force only causes operator fatigue, increased wear and reduced control.

Page 6
5280 RULES FOR SAFE OPERATION
15. KEEP HANDS AWAY FROM ALL CUTTING EDGES AND MOVING PARTS.
16. WEAR GLOVES WHEN CHANGING BLADES.
17. 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.
18. DO NOT OVERREACH. MAINTAIN CONTROL: Keep proper footing and balance at all times.
Maintain a firm grip.
19. STAY ALERT: Watch what you are doing, and use common sense. Do not use 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.
21. UNPLUG EQUIPMENT: When it is not in use, unplug tool before changing blades, accessories or
performing recommended maintenance or when not in use.
22. MAINTAIN EQUIPMENT 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 EQUIPMENT: When not in use, store in a dry, secured place. Keep away
from 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. Take caution when moving or transporting.
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 7
5280 RULES FOR SAFE OPERATION
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.
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 A
2
1
3
GROUNDING
1. Cover of grounded outlet box
2. Outlet ground
3. Grounding prong
WARNING: Electrical cords can be hazardous. Misuse can result in fire or death by electrical
shock. Read carefully and follow all directions.

Page 8
5280 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 9
5280 GENERAL 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 UP PROCEDURE
TO RUN MACHINE:
1. Machine MUST be off before plugging machine
into power source.
2. Plug machine into outlet.
3. Turn speed control to slowest position.
4. Turn machine on.
5. Engage forward switch.
6. Increase speed control to desired speed.
ON/OFF
SWITCH
SPEED
CONTROL
FORWARD
SWITCH
PRESSURE
VALVE
HYDRAULIC
FILLER PORT
SPECIFICATIONS #5280
Length: 25.5''
Width: 11.5''
Height: 38.5''
Weight (machine only): 207 lbs.
Speed: 12 - 50
feet per minute
MOTOR INFORMATION
RPM: 1725
Volts: 115
HP: 1
Amps-Full Load: Under 10
Continuous Duty
SPECIFICATIONS

Page 10
5280 GENERAL OPERATION
MAINTENANCE
1. Always wear eye protection.
2. Keep flammable and fragile objects away from this tool.
3. Always check nuts and bolts to make sure they are tight.
4. Always use the tool with proper voltage specified in the machine’s name plate.
5. Always keep guards in place.
6. Do not operate around water or wet conditions without use of GFI on cord.
7. Use properly grounded cord and receptacle.
8. Unplug from power before servicing.
9. Use 12 gauge or heavier wire cord, not exceeding 50 feet in length.
10. Do not force machine.
11. Do not alter machine.
12. Pressure valve has been factory set and should NOT be tampered with.
13. Hydraulic Fluid: Keep clean and at a proper level.
14. Keep wheels free from debris.
INSPECTION PROCEDURE HYDRAULIC
PREVENTIVE MAINTENANCE CHECKLIST
By following this preventive maintenance checklist, you can maintain your equipment
hose efficiently, safely and with very little effort. Each step is covered in detail in the
following section.
Always turn off and unplug electrical source before servicing.
Place equipment and components in a safe or neutral position.
Remove access panels (if any) and inspect hose and fittings for damage or leaks.
Repair or replace as needed.
Inspect all hydraulic components.
Reinstall the access panels.
Turn power back on.
Be aware of your equipment, always look and listen for anything unusual.
WARNING: Do not lock wheel drive into a permanent on position. If operator would lose control or
be disabled, machine continues to operate.

Page 11
5280 TRANSPORTATION
LOADING
ALWAYS REMOVE ALL COUNTERWEIGHTS AND BLADES BEFORE LOADING OR UNLOADING.
LIFTING BAIL
• Easy loading when not driving or using a ramp.
• Use rope, hook system or chain through eyelets located on top of machine (See Figure A).
• Location on lifting bails centrally locates balance of the machine to safely pick-up machine.
• Raise machine with a fork lift or winch.
RAMP
• Make sure ramp is clean and dry, free of grease or oil.
• Attach ramp securely to back of vehicle, making sure there is good contact (See Figure B).
• Position machine at back of ramp (See Figure A). Engage power switch and drive onto vehicle.
Figure A
WARNING: Keep hands and feet out from
under machine.
WARNING: Make sure ramp is secure before using. Failure to do so could cause ramp to fall
away from truck, causing damage to the machine and/or injury to the operator.
WARNING: When maneuvering machine on any type of a incline (ramp, hill, etc.), wheel engage
pins MUST be in place (in engaged mode) (See Figure B) and counterweights removed.
Figure B

Page 12
5280 TRANSPORTATION
UNLOADING
• Position machine at the back of the truck in line with the ramp (See Figure B).
• Carefully move machine onto ramp leaving cutting head down (in contact with ramp surface).
• Make sure you have machine under control. Failure to do so could cause machine runaway, damage to
machine, damage to property or cause serious injury.
• Slowly back machine down ramp.
WARNING: Ramp must have good contact with the back of the vehicle. Failure to do so could
cause ramp to lose contact with back of vehicle resulting in damage to the machine or injury to
the operator.
Figure A Figure B

Page 13
5280 BLADES
• 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 use #584 Scoring Tool (See Figure B).
• Score flooring to the width of the blade (See Figure C).
• Keep in mind, narrow width blades will make a cleaner floor surface.
•KEEP BLADES SHARP!
• Dull blades greatly affect the performance of the machine.
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.
Figure C
Figure BFigure A

Page 14
5280 BLADES
Figure A
Figure B
BLADE SETTING (continued)
• Self scoring blades are available in a number of sizes. These blades eliminate the need for pre-scoring
material. 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 the machine.
• Keep scoring wings sharp at all times.
• Keep your work area clean and clear of debris.
• After you have removed a portion of material, remove it out of the way. This will give the machine
maximum performance and help to keep the work area safe.
BLADE CHANGING
• Sharp blades are imperative for good performance.
• Always wear gloves when changing blades.
• Use supplied extended wrench or a socket wrench with at least a 3" extension to keep hand safely
away from the sharp edge of the blade.
1. Place a block under the front of the machine as shown in Figure A, using a flat piece of 2 x 4 or
something similar.
2. Loosen five (5) hex head bolts with extended bolt wrench (See Figure B). It is not necessary to
remove bolts. 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.
CAUTION: Blades are sharp.

Page 15
5280 BLADES
BLADE SHARPENING
• Always wear gloves and safety glasses.
• Using hand grinder, block up front of machine so blade is off the floor.
• Grind blade using a 4" diameter disk with 120 or finer grit. Be careful not to catch disk on edge or corner
of blade. Blade bevel up (See Figure A).Blade bevel down (See Figure B).
• Pass grinder back and forth along blade edge being careful to hold grinder at proper angle of blade.
Grind until sharp.
• Using a good quality fine tooth hand file, use same procedure as above (See Figure C).
• Blades are sharp. Use extreme caution.
• Have plenty of sharp blades on each job so on-the-job blade sharpening is eliminated.
• It is best to resharpen dull blades on proper bench or belt grinder in the shop, so the blades are ready
for the next job.
Figure A Figure B
Figure C

Page 16
5280 BLADES
#6253 RIPPER TEETH: Used on real hard to
remove goods; Hardwood, Vct and some ceramics
SELF SCORING BLADES: Eliminates pre-scoring
carpet. See sizes and accessories on Page 17.1.
.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
Tempered
.187
.062
Swivel Head
Attachment

Part # Description Application Thickness
#130-S 3'' x 10'' Blade with slots Glued down carpet, tile or resilient .062
#130-D 3'' x 10'' 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 cleanup and longer durability .062
#136 5" x 8" Blade Removal of wood flooring .062
#147 4" x 6" Blade Tile or linoleum on concrete floors .062
#147-D 4" x 6" 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 5" x 6" Blade with both edges sharpened Tile or linoleum on wood floors .062
#363-2 3/4'' x 8'' Scraper Blade (50/pkg) .032
#368-8 7/8'' x 8'' Razor/Scraper Blade (50/pkg) .045
#368-12 7/8'' x 12'' Razor/Scraper Blade (50/pkg) .045
#368-15 7/8'' x 15'' Razor/Scraper Blade (50/pkg) .045
#6253 Self-Propelled Ripper Teeth Difficult surfaces: ceramic, hardwood, heavy tile, etc.
#6255-BU 4" x 6" Self Scoring Blade - Bevel Up .062
#6256-BU 4" x 6" Self Scoring w/4” Bevel Up .062
#6257-BU 3'' x 9'' Self Scoring Blade - Bevel Up .062
#6258-BU 3" x 12" Self Scoring Blade - Bevel Up .062
#6259-BU 3" x 14" Self Scoring Blade - Bevel Up .062
#6277-BU 3'' x 12'' Self Scoring Blade .094
#6278-BU 3'' x 14'' Self Scoring Blade .094
#6270 1-1/2" x 3" Extra Heavy Duty Blade Ultra tough coatings, ceramic & hardwood .250
#6271 3" x 6" Extra Heavy Duty Blade Ultra tough coatings, ceramic & hardwood .250
#6273 3" x 11" Extra Heavy Duty Blade Ultra tough coatings, ceramic & hardwood .250
#6281 3'' x 8'' Heavy Duty Blade .094
#6282 3'' x 14'' Heavy Duty Blade .094
#6284 3'' x 12'' Heavy Duty Blade .094
#6285 3'' x 6'' Heavy Duty Blade .094
#6286 3'' x 10'' Heavy Duty Blade .094
#6290 3'' x 6'' Extra Heavy Duty Blade .187
#6291 3'' x 8'' Extra Heavy Duty Blade .187
#6292 3'' x 12'' Extra Heavy Duty Blade .187
#6293 3'' x 14'' Extra Heavy Duty 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
Page 17
5280 BLADES
Razor sharp, super hard for scraping thin epoxies, thin mil coatings
like; urethane paint, poured elastomeric coatings up to 60 mil, hard
to remove adhesive and much more
A heavy duty blade that still gives a little flex. Made with our proven
blade hardening process, these blades will stay sharper longer with
better overall performance than any other blade on the market.
Works on Vct, Vat, wood, tile, rubber epoxy, thin-set, elastomeric
coatings, scraping thin-set, glued ceramic
Extremely hard, high abrasion alloy 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 extremely well.
Ultra high quality 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, Unitary or secondary backing, vinyl
backing, soft to medium Pvc, linoleum, carpet tiles, soft cork,
Enhancer and Uniband hot melts
#5280-500 Holds razor blades up to 1'' wide
Mainly used for VCT but can be used on most other applications.
Supplies more of an angle when needed. Prevents machine from
jumping off material.
Unique attachment rotates to use the other sharp edge without having to change blade.
Works on thin soft coatings, paint, hard to remove gummy or dry adhesives.
Same application as the .062 blade but w/45° angle, self scoring wings for
easy sharpening. The thickness greatly reduces breakage.

Page 18
5280 PROCEDURES
WHEEL REMOVAL
• Examine back of wheels (with a flashlight is helpful) to
see if debris is built up.
• Keep clean from yarn build up.
• Unplug machine.
• Lay machine on its side.
• Use provided 3/16" allen wrench.
• Remove wheel securing screw
• Remove wheel securing cap.
• Wheel will slide off. Watch for keyway key.
DO NOT LOSE.
• Remove wheel spacer. This should be
inspected at regular intervals.
INSPECTION OF INTERNAL PARTS
Visual inspection of internal parts can be done without
draining tank.
• Remove two lifting bail eyebolts and the two bolts from
the back of the tank.
• Carefully lift tank 3'' to 4''.
• Using a flashlight, inspect drive chain, hoses, front seal
on motor, and suction and pressure line
on pump.
• If service is necessary, follow procedure for
tank removal.
Wheel
Securing
Screw

Page 19
5280 PROCEDURES
SPEED CONTROL
• Speed control knob can be adjusted while machine
is running.
• Turning speed control knob counter clockwise will
make machine run faster (See Figure C).
• Turning speed control knob clockwise will make
machine run slower (See Figure C).
SPEED CONTROL REPLACEMENT
• Use a 3/32'' allen wrench to remove plastic knob.
• Use a 1'' deep socket to remove and replace speed
control valve.
• Re-install plastic knob.
PRESSURE VALVE REPLACEMENT
This has been factory set and should not be tampered with.
• Use a 1'' deep socket to remove old unit and install
new.
FORWARD SWITCH REPLACEMENT
• Disconnect power source to unit.
• Remove 2 1/4 - 20 x 1/2 hexhead bolts from handle.
Use 7/16 diameter wrench or socket.
• Remove 1/4-20 bolt from lever
• Remove switch.
• Remove 2 spade connectors from switch.
• For switch replacement, bend the 2 prongs 90º from
both ends of switch. Use old switch as a pattern.
POWER CORD
• If power cord is damaged, it must be replaced by
National or its service agent, or a similar qualified
person in order to avoid a hazard.
Speed
Control
Faster Slower
Figure C
Counter
Clockwise
Clockwise