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National Flooring Equipment PANTHER 8274, Instruction Manual

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National Flooring Equipment PANTHER 8274 Instruction Manual Download Page 27

Page 26

MAINTENANCE

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. 

1. Always wear eye protection. 

2. Keep flammable and fragile objects away from the tool. 

3. Always check nuts and bolts to make sure they are tight. 

4. Always use the tool with proper voltage specified on the machine's nameplate. 

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. Keep wheels free from debris. 

13. Maintain Labels. These carry important information. If unreadable or missing, contact National for a

free replacement.

MAINTAINING TOOLS

Keep in good repair by adopting a regular maintenance program. Before use, examine the general
condition. 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. Tag damaged tool, “DO NOT USE” until repaired (See
Repairs). 

• Mechanical inspection and cleaning (pulleys, belts, bearings, nuts, bolts, housing, labels, etc.).

• Electrical inspection (switch, cord, plugs, etc.).

• Testing to assure proper mechanical and electrical operation.

8274/9274 MAINTENANCE

WARNING

: DO NOT lock switch on handle into a permanent on position. If operator would lose

control or be disabled, machine continues to operate.

WARNING

: To reduce the risk of injury, always unplug your tool before performing any

maintenance. Never disassemble the tool or try to do any rewiring on the tool’s electrical system.
Contact National for ALL repairs.

Summary of Contents for PANTHER 8274

Page 1: ...Read Manual Before Operating Machine 8274 9274 9250 XYLON AVENUE NORTH MINNEAPOLIS MN 55445 U S A 800 245 0267 763 535 8206 FAX 763 535 8255 FAX 800 648 7124 WEB SITE www nationalequipment com E MAIL info nationalequipment com National Flooring Equipment Inc ...

Page 2: ...lacement 18 I Satellite Bearing Replacement 18 J Removing Top Gear Plate 19 K Light In Cord Plug 19 L Machine Start Up 20 M Controller Fault Circuit Overload 21 N Controller Codes 22 i Controller Default Codes 22 ii Controller Error Codes 22 O Troubleshooting 22 1 P Power Cord 23 Q Power Source Voltage 23 Accessory Set Up 24 25 Maintenance 26 27 A Maintaining Tools 26 B Cleaning 27 C Repairs 27 Co...

Page 3: ...barriers or shields as needed to protect others from debris 10 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 11 CHECK FOR DAMAGED PARTS Inspect guards and other parts before use Check for misalignment binding of movin...

Page 4: ...tructions for lubricating and changing accessories Periodically inspect tool cords and extension cords for damage Have damaged parts repaired or replaced 24 STORE IDLE EQUIPMENT When not in use store in a dry secured place Keep away from children 25 MAINTAIN LABELS AND NAMEPLATES These carry important information If unreadable or missing contact National for a free replacement 26 MACHINE IS HEAVY ...

Page 5: ...Stays alert at all times never lets guard down Skills Only performs duties he she are qualified to do Always tries to improve Judgment Plays it safe Doesn t take chances Common Sense Does the right thing without having to be told Applies knowledge Recognizes the Hazards Maintains alertness Anticipates danger Understands the Defense Knows that safety isn t an accident it s a thinking person s choic...

Page 6: ...nd ordinances The plug and outlet should look like those in Figure A B Figure A 2 1 3 GROUNDING 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 whethe...

Page 7: ...n 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 not running before disconnecting cord FU...

Page 8: ...ration Failure to do so could cause damage to equipment or bodily injury Read and understand operators instruction manual and instructional video before operating this equipment WARNING Failure to follow any of the above instructions could cause damage to machine damage to property or serious bodily injury or death WARNING SILICA DUST WARNING Grinding cutting drilling of masonry concrete metal and...

Page 9: ...LOAD Always disconnect from power source before transporting Loosen Handle Securing Bolts to slide handle down to make machine easier to load Retighten Bolts when handle is at the desired height 8274 9274 TRANSPORTATION ...

Page 10: ... 230 Volt 8274 18 GRINDER 9274 22 GRINDER Digital Read Out Able to monitor load or RPM s Variable Speed Forward Reverse Stock 8274 1 8274 3 8274 4 Disc Size 18 Inch 18 Inch 18 Inch HP 1 3 4 Motor Phase 3 Phase 3 Phase Single Phase Voltage 115 V 230 V 115 V Height 38 38 38 Length 32 32 32 Width 19 19 19 Weight 265 lbs 360 lbs 360 lbs Stock 9274 1 9274 2 Disc Size 22 Inch 22 Inch HP 3 4 Motor Phase ...

Page 11: ...operly tighten bolt Handle adjusts in both height and angle Adjust handle grip to desired angle and firmly secure Figure B Adjust handle to desired angle and secure with clip Figure C 8274 9274 PROCEDURE WARNING Handle must be engaged with both securing bolts Failure to do so could cause serious injury Figure B Figure A Figure C ...

Page 12: ...nded standard Make sure the rubber dust guard is covering all the way to the floor surface The machine is provided with a vacuum port at the rear of the machine Use a vacuum hose that snugly fits either on the outside or the inside of the port Connect vacuum hoses Figure A Figure B WEIGHTS Weights rotate front to back To apply added weight to head one or or both weights can be rotated forward Figu...

Page 13: ...around the shroud making sure the guard rests on the floor surface and is secure Inspect for air gaps If rubber guard securing Velcro becomes loaded up with debris wash out with mild soap or blow out with an air hose If Velcro on the machine is damaged or worn out replace before using the machine If the rubber guard is cut damaged or worn out replace before using the machine Safety glasses need to...

Page 14: ...st guard page 13 Remove the four bolts on top of the shroud cover Figure A Pull back on the handle The shroud should lift up and away from the grinding disc Figure B If it does not lift away using a pry bar on each side gently pry plate away from shroud Do Not Force Move machine back and off the plate Figure C Figure A Figure B Figure C ...

Page 15: ...nter pulley Figure B C Belt should be tightened to have less than of movement Figure E 9274 Loosen do not remove both bolts on one of the tension brackets Figure F Pivot the loosened bracket so it is evenly spaced with the center pulley Figure G H Apply pressure with a pry bar between the gear plate and tension bracket Figure I tighten both bolts on the bracket Recheck the spacing between the brac...

Page 16: ...Belt Tension procedure MOUNTING PLATE ON TO MACHINE Grease shaft first Shaft key needs to line up with key notch on plate Figure E To temporarily hold key in place secure key with an o ring or rubber band Figure F Position machine over plate Figure G Swivel machine until key fits into plate Secure the four bolts on top of the shroud cover Figure H Replace the dust guard Figure E Figure F Figure G ...

Page 17: ...e ring is seated in the groove Figure C Reinstall belt PULLEY REPLACEMENT Remove belt following belt removal instructions page 14 16 Remove nut from top of pulley Figure D Slide pulley up and off Key will fall out Figure E Replace key in new pulley Line up key in pulley Figure F Install pulley Reinsert nut Reinstall belt 8274 9274 PROCEDURE Figure A Figure B Figure C Figure D Figure E Figure F ...

Page 18: ...E BEARING REPLACEMENT Remove pulley page 17 Remove satellite shaft Block up plate Figure D Knock out bearing Figure E Turn plate over on blocks With the retainer ring turned upwards replace the bearing Figure F keeping the bearing as straight as possible Figure G NOTE BEARING CAN BE DIFFICULT TO GET INSERTED Replace shaft Replace pulley page 17 Replace nut Reinstall belt 8274 9274 PROCEDURE Figure...

Page 19: ...NOTE HITTING AROUND THE OUTSIDE PERIMETER OF THE BEARING KEEP THE BEARING AS STRAIGHT AS POSSIBLE Replace gear back onto plate keeping fingers clear Figure G PINCH POINT wiggle bearing until it drops down DO NOT FORCE Reinsert snap rings making sure they are seated in the groove Reinsert gear plate Reinsert four screws Reinstall belt 8274 9274 PROCEDURE LIGHT IN CORD PLUG Red flashing light in cor...

Page 20: ...rrow to increase speed up to a factory preset maximum Press Down Arrow button to decrease speed PRESS STOP to stop running motor MACHINE START UP PROCEDURE TO RUN MACHINE 1 Connect machine to power source 2 Attach tether cord to both operator and machine Figure A Failure to do so could cause damage to property and or machine 3 Securely hold handle with one hand Note Applying light pressure downwar...

Page 21: ... Enter Button on the controller twice Figure A If display reads over 100 percent Figure A the machine is over loaded To take load off the machine follow one or more of the following 1 Pull the weights back Figure B 8274 one weight each side 9274 one or two weights each side or remove completely from the machine 2 Counter balance machine take some weight off the head by angling the handle further b...

Page 22: ...ag Erratic line volts Check power supply cord or for loose connection External Acceleration Kill switch off Check kill switch it is either off or malfunctioning External Run Kill switch off Check kill switch it is either off or malfunctioning CONTROLLER CODES 8274 1 9274 1 Description First Flash Second Flash Third Flash Over Temp Dot Dot Dot Thermal Switch Dot Dot Dash Hall Error Dot Dash Dot Ove...

Page 23: ...Page 22 1 TROUBLESHOOTING Trouble Possible Cause Remedy 1 Tooling plates fall off a a Replace screw can use loktite ...

Page 24: ...01 Voltage Meter Figure A easily plugs into any outlet to determine the amount of voltage at that specific outlet The use of a 5110 500 Buck and Boost Transformer Figure B improves voltage out of a receptacle Figure A Figure B POWER CORD Use a 12 gauge power cord not exceeding 50 feet in length If there is loss of power convert to a 10 gauge power cord Do not allow the rotating plates to come into...

Page 25: ...fied electrician NOTE In Canada the use of a temporary adapter is not permitted by the Canadian Electrical Code Improper use of the grounding plug can result in a risk of electrical shock Know what you are removing Scraping sanding or grinding can release health hazardous dust and liquids Make sure you are following OSHA State and or Federal guidelines when removing hazardous materials Take necess...

Page 26: ...achine tilt motor back to expose grinding head Figure B Figure A Figure B Attach selected accessories When setting machine down into operation position hold machine firmly Set down gently DO NOT drop Damage to accessories and machine could occur if dropped WARNING When accessories are exposed never operate machine Serious injury and possible plate disengagement could occur Page 25 ...

Page 27: ... replacement MAINTAINING TOOLS Keep in good repair by adopting a regular maintenance program Before use examine the general condition 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 t...

Page 28: ...able or combustible solvents around machinery Never use machine wet Replace missing or worn labels Labels contain important safety and operational information REPAIRS If your tool is damaged call for a return repair authorization number and return to National Flooring Equipment Inc 9250 Xylon Avenue Minneapolis MN 55445 763 535 8206 800 245 0267 Shipments are not accepted without a return authoriz...

Page 29: ...Note Number in parenthesis is the amount needed on each machine Parts are sold individually Be sure to order the number of parts needed ...

Page 30: ... REAR HANDLE WELDMENT 70301 36 VAC HOSE 2 FOR 8274 1 8274 4 70703 UNHARDENED DOWEL PIN 375 X 1 70820 ISOLATOR 4 71202 12MM ID CENTER BEARING 2 SKF6201 2RS 71222 20MM ID SATELLITE BEARING 3 MRC 5304CZZ6 71232 20MM ID IDLER BEARING 12 1DC 6205 2PS 72361 1 5 HP MOTOR 115 VOLT 72381 4 HP MOTOR 115 VOLT NOT SHOWN FOR 8274 4 72802 1 2 90 CORD CONNECTOR 72804 1 2 STRAIGHT CORD CONNECTOR 375 500 73029 1 4...

Page 31: ...TARY VACUUM SPLITTER 80040 PLANETARY HANDLE WEIGHT 2 80042 KILL SWITCH 80043 22 TOOTH PULLEY FOR 8274 ONLY 80045 1 2 INSIDE 1 OUTSIDE BUSHING 2 NOT SHOWN 80046 3 4 10 NYLON LOCK NUT 2 NOT SHOWN 80047 4 X 3 8 HANDLE PINS NOT SHOWN 80049 SCRUBBER SHAFT WELDMENT 3 80054 T HANDLE 5 X 45 80057 2 25 WEIGHT STUD 4 NOT SHOWN 80063 SPRING 1 22 OD X 1 50 LONG 80064 PULL OUT DOWEL 7 16 80066 SPROCKET BEARING...

Page 32: ...Y DISK 9274 102 AC DRIVE CONTROLLER 230 VOLT 9274 201 GEAR BOX 70301 36 VAC HOSE 2 70703 UNHARDENED DOWEL PIN 375 X 1 70820 ISOLATOR 4 71202 12MM ID BEARING SKF6201 2RS 71222 20MM ID SATELLITE BEARING 3 MRC 5304CZZ6 71232 20MM ID IDLER BEARING 12 1DC 6205 2PS 72371W 3 HP MOTOR 230 VOLT FOR 9274 1 ONLY 72381 4 HP MOTOR 115 VOLT FOR 9274 2 ONLY 72585 EXTENSION CORD 72586 POWER CORD 230VOLT 72802 1 2...

Page 33: ... ASSEMBLY TUBE OVAL 80035 TUBE INNER WELDMENT 80036 HANDLE TUBE WELDMENT 80037 PLANETARY HANDLE ASSEMBLY FRAME 80038 HANDLE ASSEMBLY COMPLETE 80039 PLANETARY VACUUM SPLITTER 80040 PLANETARY HANDLE WEIGHT 2 80042 KILL SWITCH 80045 1 2 INSIDE 1 OUTSIDE BUSHING 2 NOT SHOWN 80046 3 4 10 NYLON LOCK NUT 2 NOT SHOWN 80047 4 X 3 8 HANDLE PINS NOT SHOWN 80049 SCRUBBER SHAFT WELDMENT 3 80054 T HANDLE 5 X 45...

Page 34: ...lator 4 72361 1 5 HP Motor for 8274 1 only PART DESCRIPTION 72371W 3 HP Motor for 9274 1only 72381 4 HP 115 Volt Motor for 8274 4 9274 2 only Not shown 80024 Handle Block Thru 80026 Handle Oval 80035 Inner Tube Weldment 80036 Outer Tube Weldment 80037 Handle Assembly Frame 80038 Handle Assembly Complete 80039 Vac Splitter 8274 46 80037 80036 80026 80024 HANDLE PARTS 80035 80039 70820 80038 72361 7...

Page 35: ...ont Handle PART DESCRIPTION 9274 43 Rear Handle Weldment 70301 36 Vac Hose 2 For 8274 1 8274 4 72802 1 2 90 Cord Connector 72804 1 2 Straight Cord Connector 375 500 73204 3 8 Split Lock Washer 73225 3 18 16 x 5 8 Hexhead Cap Screw 80040 Planetary Handle Weight 2 80042 Kill Switch 80054 T Handle 5 x 45 8274 EXTERNAL PARTS 6254 8274 29 9274 43 80040 7274 200 9274 39 8274 45 8274 7 80042 72804 6280 1...

Page 36: ...2 1DC 6205 2RS 70703 Unhardened Dowel Pin 375x1 73029 1 4 20 x 3 4 Flat Head Socket Cap Screw 4 73046 1 4 20 x 3 8 Button Head Screw 73208 3 8 16 Hexhead Cap Screw 3 73237 3 8 Hardened Washer 3 73904 3 16 x 3 16 x 3 4 Key 74102 1 00 Retaining Ring 6 Not Shown 74103 1 Retaining Ring Not Shown 74801 01 x 2 8 ID Shim Washer 80049 Scrubber Shaft Weldment 3 80043 22 Tooth Pulley 3 80063 Spring 1 22 OD ...

Page 37: ... Cord 230 Volt PART DESCRIPTION 72802 1 2 90 Cord Connector 72804 1 2 Straight Cord Connector 375 500 72807 Male Plug Controller HBL2411 72808 Female Plug Controller HBL2413 73204 3 8 Split Lock Washer 73225 3 18 16 x 5 8 Hexhead Cap Screw 80040 Planetary Handle Weight 2 80042 Kill Switch 80054 T Handle 5 x 45 9274 EXTERNAL PARTS 9274 43 80040 7274 200 9274 45 72808 72807 Page 35 9274 39 72585 927...

Page 38: ...g 2 SFK6201 2RS 71222 20MM ID Bearing 3 MRC 530 4C226 71232 20MM ID Bearing 12 1DC 6205 2RS 73029 1 4 20 x 3 4 Flat Head Socket Cap Screw 4 73046 1 4 20 x 3 8 Button Head Screw 73208 3 8 16 Nylon Lock Nut 3 73237 3 8 Hardened Washer 3 73904 3 16 x 3 16 x 3 4 Key 74103 1 Retaining Ring Not Shown 74801 01 x 2 8 ID Shim Washer 80001 20 Tooth Pulley 3 80049 Scrubber Shaft Weldment 3 80063 Spring 1 22 ...

Page 39: ...95J 110 Volt Label for 8274 L95I 220 Volt Label for 9274 L104B Read and Understand Label PART DESCRIPTION L106 Pinch Point Label 2 L141 Made in USA Flag Label L175 National Label Small L265 Silica Dust Warning Label L266 8274 Stock Number Label L268 9274 Stock Number Label Not Shown L265 L266 L141 L175 L38 L95B L95I L95J L104B L106 ...

Page 40: ...al Bond Profiling Diamond 73081 Tooling Mount Screw 9507 HALF SEGMENT 9508 FULL SEGMENT 9510 PROFILING BRAZED TRAPEZOID Utilized primarily in light industrial and residential applications for concrete grinding profiling as well as sealer and top coat removal Provides excellent surface profile for new coatings epoxies or stains Also creates an exceptional profile for concrete preparation restoratio...

Page 41: ...30 30 Grit 5 Brazed Diamond 9235 50 50 Grit 5 Brazed Diamond 9235 100 100 Grit 5 Brazed Diamond DIAMOND SANDING PADS Used to efficiently remove manufacturer impregnated stains and sealers from interior hardwoods In addition will create a perfect surface profile to receive new stains guaranteeing proper saturation and adhesion 9255 50 Sanding Pad 9255 70 Sanding Pad 9255 120 Sanding Pad 9255 220 Sa...

Page 42: ... pads and brazed disks 9246 Assembly 9245 Adapter 9245 ADAPTER 9246 ASSEMBLY SANDPAPER DISKS Utilized on interior hardwood surfaces the National 8274 and 5274 grinding systems with 5 sandpaper disks efficiently removes factory applied stains finishes without the mess created by a traditional belt sander 9278 F Sandpaper Fine Grit 9278 M Sandpaper Medium Grit 9278 C Sandpaper Coarse Grit Page 40 ...

Page 43: ...ding Diamond Full Segment 9285 Trapezoid Polycrystalline w o Sacrificial Wear Bar 9273 Plate Shown w 9284 Polycrystallines Polycrystallines Plate sold separately Versatile Floating Action 9292 Floating Assembly Floating spring action allows tooling to follow the surface contour Allows floating ability on all tooling allowing tooling to work consistently Provides profiling and polishing on uneven s...

Page 44: ...eparation prior to polishing 9250 6M Metal Bond Plug 6 Grit soft bond for hard concrete 9250 14M Metal Bond Plug 14 Grit soft bond for hard concrete 9250 30M Metal Bond Plug 30 Grit soft bond for hard concrete 9250 70M Metal Bond Plug 70 Grit soft bond for hard concrete 9250 120M Metal Bond Plug 120 Grit soft bond for hard concrete 9250 220M Metal Bond Plug 220 Grit soft bond for hard concrete 925...

Page 45: ...ly 9267 50 Polishing Pad 50 Grit 9267 100 Polishing Pad 100 Grit 9267 200 Polishing Pad 200 Grit 9267 400 Polishing Pad 400 Grit 9267 800 Polishing Pad 800 Grit 9267 1500 Polishing Pad 1500 Grit 9267 3000 Polishing Pad 3000 Grit 9267 Buff Polishing Pad Buff 73250 Plate Mounting Screw Polishing Pad 9257 Plate w Velcro Floating Polycrystalline Used to prep unlevel floors Floating mechanisms allows d...

Page 46: ...ug Diamond 6 9250 120M 120 Grit Metal Bond Plug Diamond 3 73250 Plate Mounting Screw 18 74605 Tooling Mounting Screw 11180 CONCRETE POLISH PACKAGE LEVEL 4 HIGH SHINE PACKAGE 3 9257 5 Plate w Velcro 3 9267 50 50 Grit Resin Polishing Pad 3 9267 100 100 Grit Resin Polishing Pad 3 9267 200 200 Grit Resin Polishing Pad 3 9267 400 400 Grit Resin Polishing Pad 3 9267 800 800 Grit Resin Polishing Pad 3 92...

Page 47: ...zzo Plug Diamond 6 9251 14T 14 Grit Terrazzo Plug Diamond 6 9251 30T 30 Grit Terrazzo Plug Diamond 3 74605 Tooling Mounting Screw 11240 COATING REMOVAL PACKAGE 3 9273 5 Plate for Grinding Diamonds 6 32901 80 Grit Grinding Diamond 3 73250 Plate Mounting Screw 18 74620 Grinding Diamond Mounting Screw 11250 COATING REMOVAL PACKAGE 3 9273 5 Plate for Abrasive Carbides 6 9249 C Abrasive Carbide Coarse ...

Page 48: ...e and exclusive warranties granted by National and shall be the sole and exclusive remedy available to the purchaser Correction of defects in the manner and for the period of time described herein shall constitute complete fulfillment of all liabilities and responsibilities of National to the purchaser with respect to the product and shall constitute full satisfaction of all claims whether based o...

Page 49: ...ed Check One Repair Do you wish to be contacted before repairing Yes No Return Contact National if a loaner is needed Return Authorization Number Date Customer Number Purchased From required contact National INTERNAL USE ONLY Date Received Unit Serial Number Subject To Warranty if known if not directly from National ...

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