OWNER`S MANUAL
Contents
1. MODEL 440 amp 450 ROTARY BLADE GRINDER OWNER S MANUAL You must thoroughly read and understand this manual before operating the equipment paying particular attention to the Warning amp Safety instructions 44060 2 05 SAFETY INSTRUCTIONS Safety Awareness Symbols are inserted into this manual to alert you to possible Safety Hazards Whenever you see these symbols follow their instructions The Caution Symbol identifies special instructions or procedures which if not strictly observed could result in damage to or destruction of equipment The Warning Symbol identifies special instructions or procedures which if not correctly followed could result in personal injury KEEP GUARDS IN PLACE and in working order 12 MAINTAIN GRINDER WITH CARE Follow instructions in this manual for lubrication and 2 REMOVE WRENCHES AND OTHER TOOLS preventive maintenance 3 KEEP WORK AREA CLEAN 13 DISCONNECT POWER BEFORE SERVICING or when changing the grinding wheel 4 DON T USE IN DANGEROUS ENVIRONMENT Don t use grinder in damp or wet locations 14 REDUCE THE RISK OF UNINTENTIONAL Machine is for indoor use only Keep work area STARTING Make sure the switch is OFF before well lit plugging in the grinder 5 KEEP ALL VISITORS AWAY All visitors should 15 USE RECOMMENDED ACCESSORIES Consult keep a safe distance from work area the manual for recommended accessories Using improper accessories may cause2. 1 HP 115 230 Volt 50 60 Hz 1 Phase Grinding Wheel 8 Diameter x 1 00 Wide 24 Grit Maximum Blade Length Any Length Sound Level Greater than 85 Dba when operating DAILY MAINTENANCE On a weekly basis clean the rotary blade grinder by wiping it off On a weekly basis inspect the grinder for loose fasteners or components Approximately every 40 hours of operation remove the front blade support base and grinding wheel Then clean the inside of the grinder by wiping it off DO NOT USE COMPRESSED AIR TO CLEAN GRINDING DUST FROM GRINDER C UNPACK THE CARTON Use care when unpacking Open box remove the contents and lay parts out on a table Check components against the Parts List on Page 11 to insure all parts were shipped and are in working order Inspect all items for shipping damage as they are removed from the shipping containers If you find any damage notify the carrier s claims agent and do not proceed with unpacking until the damage has been inspected by the agent Refer also to the Shipping Receiving Instructions packed with this unit Install grinder in a dry indoor area with adequate lighting and ventilation WIRING INSTRUCTIONS IMPORTANT GROUNDING INSTRUCTIONS In case of a malfunction or breakdown grounding reduces the risk of electrical 115 Volt Model Only shock by providing a path of least resistance for electrical shock Plug the power cord into standard This Grinder has an electrical cord with an equip
3. Blades 1 CLEANING A rotary mower blade which has a buildup of dirt and dried grass clippings cannot be properly sharpened or balanced To clean your blade follow these steps 1 Put on safety glasses 2 Scrape off the heavy grass buildup with a flat scraper 3 Use a wire wheel on a bench grinder or a wire brush by hand to finish cleaning 2 INSPECT THE BLADE If the blade is bent twisted or cracked it must be replaced See FIG 3 DO NOT ATTEMPT TO STRAIGHTEN OR REPAIR A BENT CRACKED OR TWISTED BLADE THE USE OF SUCH A BLADE COULD PRESENT A SERIOUS SAFETY RISK 3 GRINDING READ AND FOLLOW ALL SAFETY PROCEDURES ON PAGES 2 AND 3 A With the motor off adjust the angle of the blade guide so the wheel surface is in contact with the rotary mower blade See FIG 5 Match the angle of the cutting edge whenever possible The cutting edge angle should be approximately 30 If it is not adjust the blade guide until the desired bevel is achieved Adjust the guide for minimum space between grinding wheel and guide NOTE Because of the relationship of the grinding wheel to the blade guide during grinding this grinder will give a slightly concave surface See FIG 4 This is normal and acceptable Wheel Hotation Minimum opace E o Cracked Blade FIG 3 Rr FIG 4 SAFETY GLASSES AND GUARDS MUST BE IN PLACE AND ALL FLAMEABLES REMOVED FROM AREA BEFORE OPERATING GRINDER ROTATE S
4. provided by the grinding wheel manufacturer These instructions include the following important points 1 Always unplug the grinder before installing the new wheel 2 Read and follow safety instructions on page 3 3 Look at the threads on the wheel mounting adapter or hub They are left hand thread 4 Remove the old wheel and install the new wheel Make sure the wheel mounting nut is tight but not so tight as to crack the wheel by crushing it between the flanges 5 Make sure all guards are in place Wear Safety Goggles Keep hands away from the wheel 6 Start the grinder and check for excessive vibration If you have vibration loosen the mounting nut and rotate the grina ing wheel approximately 90 in relationship to the adapter shaft Tighten nut and reinstall guards then retest for vibra tion If necessary repeat rotation up to two more times When the wheel is mounted in the best position it may also be dressed for truth across the grinding surface T If reasonable balance is not attained after trying four posi tions on the grinding adapter 90 degrees apart the wheel may not be properly balanced from the factory and should be returned for replacement DRESSING THE GRINDING WHEEL From time to time the grinding wheel may build up steel par ticles in the grinding surface and will need to be dressed Each machine is supplied with one dressing stick While the grinder is running hold this brick in the grinder the
5. PARK SHEILD DOWN BEFORE GRINDING NEVER STAND IN LINE WITH GRINDING WHEEL OPERATE FROM SIDE B Turn on the motor The grinding wheel will rotates upward so that the wheel is turning toward the blade See 4 For blades that rotate clockwise insert the blade form the Wheel Guard side fo the grinder See FIG 6 For blades that rotate counter clockwise Insert the blade from the Motor side of the grinder See FIG 7 C Holding the blade firmly move the blade form the center to the outside end in a smooth even motion until the blade is sharp See FIG 5 NOTE If the blade is burning or blueing while sharpening use lighter strokes Also keep the grinding wheel dressed and clean at all times to prevent heat buildup A grinding wheel slightly rounded on the edge should run a little cooler than one dressed flat The Dressing Stick is Part No 3702508 75 x 75 x 3 00 inches D Grind the blade the same amount at each end Use slow even passes across the grinding wheel The cutting edge angle should be about 30 after grinding Several passes are generally necessary to clean up the cutting edge of the blade NOTE A 30 bevel on the sharpened edge is an ideal bevel a 15 bevel would be too sharp and dull very rapidly A 45 bevel is too blunt See FIG 6 FIG 5 FIG 7 FIG 6 OPERATING INSTRUCTIONS Continued E REMOVING BURR Bottom of When the blade has been sharpened stroke the Cutting Edge _ Fil
6. e bottom of the cutting edge of the blade across a deburring stone to remove any burr buildup A flat file may also be used to remove the burr See FIG 9 FIG 9 F BLADES WITH NONPARALLEL CUTTING EDGE AND S STYLE BLADES Rotary mower cutting blades with the cutting edge at an angle to the body of the blade and S style blades must be ground by holding the blade in the same way as shown in FIG 5 except the blade must be held at an angle to the grinding wheel This will permit the cutting edge of the blade to be at a right angle to the grinding wheel By maintaining this angle and by moving the blade from center to the outside end a uniform cutting edge will be ground G MULCHING BLADES For mulching blades remove the blade guide and use the rounded edge fo the adjustable support as the guide See FIG 10 H BALANCING THE BLADE FIG 10 Check the balance of the blade by placing it on the balancer The blade need not be perfectly balanced If the blade is held level and after releasing the end drops less than 1 the balance is satisfactory for ordinary use on most rotary lawn mowers Ordinarly the blade can be balanced by grinding just the cutting edge of the heavier end GUIDE FOR SMALL ENGINE VALVES Use the hole located on the Wheel Guard Cover for adjusting the length of valve stems See FIG 11 FIG 11 Grinding Wheel Installation When installing a new grind ing wheel it is important to follow the instructions
7. eel RPM Warning a j 3708448 Decal Electrical Warning Pivot Support Guide 3708606 Decal Hearing Protections 3708459 Decal STOP Spark Deflector 39 3708460 Decal START Frame Brace Not Shown 09700 Blade Balancer Pivot Plate Not Shown 3702508 Dressing Stick Base Bottom Not Shown 3707416 Strain Relief 1HP Cord Motor Base Top Not Shown 3707155 Wire Nut 1 HP Motor Leads Wheel Guard Cover Maroon Wheel Guard Cover Light Green Wheel Guard Cover Forest Green THIS PAGE LEFT INTENTIONALLY BLANK FOR NOTE TAKING PURPOSES 12
8. efore grinding 9 DON T STAND DIRECTLY IN FRONT of a DO always WEAR SAFETY GLASSES or some grinding wheel whenever a grinder is started type of eye protection when grinding 10 DON T FORCE GRINDING so that motor DO TURN OFF COOLANT before stopping to avoid slows noticeably or work gets hot creating an out of balance condition 11 DO NOT Powerwash machine AVOID INHALATION OF DUST generated by grinding and cutting operations Exposure to dust may cause respiratory ailments Use approved NIOSH or MSHA respirators safety glasses or face shields 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 SAFETY INSTRUCTIONS This machine is intended for rotary blade grinding ONLY Any use other than this may cause personal injury and void the warranty To assure the quality and safety of your machine and to maintain the warranty you MUST use original equipment manufacturers replace ment parts and have any repair work done by a qualified profes sional ALL operators of this equipment must be thoroughly trained BEFORE operating the equipment Do not use compressed air to clean grinding dust from the machine This dust can cause personal injury as well as damage to the grinder Machine is for indoor use only Do NOT Powerwash machine MACHINE SPECIFICATIONS Motor 440 1 2 HP 115 230 Volt 50 60 Hz 1 Phase 450
9. eration if the few basic rules listed below are followed These rules are based on material contained in the ANSI B7 1 Safety Code for Use Care and Protection of Abrasive Wheels For your safety we suggest you benefit from the experience of others and carefully follow these rules DO DON T DO always HANDLE AND STORE wheels in a 1 DON T use a cracked wheel or one that HAS CAREFUL manner BEEN DROPPED or has become damaged DO VISUALLY INSPECT all wheels before 2 DON T FORCE a wheel onto the machine OR mounting for possible damage ALTER the size of the mounting hole if wheel won t fit the machine get one that will DO CHECK MACHINE SPEED against the established maximum safe operating speed 3 DON T ever EXCEED MAXIMUM OPERATING marked on wheel SPEED established for the wheel DO CHECK MOUNTING FLANGES for equal 4 DON T use mounting flanges on which the and correct diameter bearing surfaces ARE NOT CLEAN FLAT AND FREE OF BURRS DO USE MOUNTING BLOTTERS when supplied with wheels 5 DON T TIGHTEN the mounting nut excessively DO be sure WORK REST is properly adjusted 6 DON T grind on the SIDE OF THE WHEEL see Safety Code B7 2 for exception DO always USE A SAFETY GUARD COVERING at least one half of the grinding wheel 7 DON T start the machine until the WHEEL GUARD IS IN PLACE DO allow NEWLY MOUNTED WHEELS to run at operating speed with guard in place for at 8 DON T JAM work into the wheel least one minute b
10. ment grounding conductor grounded receptacle and a grounding plug The plug must be plugged into a matching outlet that as shown is properly installed and grounded according to all local or other appropriate electrical codes and ordinances circuit protected by a properly sized circuit breaker or fuse 10 amp minimum for 115V application Before plugging in the Grinder make sure it will be connected to a supply 9 DO NOT MODIFY THE PLUG PROVIDED WITH THE MACHINE IF IT WILL NOT FIT THE OUTLET HAVE A PROPER OUTLET AND CIRCUIT INSTALLED BY A QUALIFIED ELECTRICIAN Always provide a proper electrical ground for your machine An improper connection can cause a dangerous electrical shock If you are unsure of the proper electrical grounding procedure contact a qualified electrician PLEASE TAKE SPECIAL NOTE OF THE FOLLOWING WARNING DECALS LOCATED ON THE FRONT AND SIDES OF THE GRINDER Symbol for Read operators Symbol to keep visitors a safe manual wear safety j distance away from the grinder glasses and disconnect power before servicing Symbol identifying a panel cover or area as having live electrical components within Symbol for sharp object which will Cause serious injury Symbol for minimum safe rated Symbol for heari RPM of grinding wheel tor hearing protection required when operating this machine OPERATING INSTRUCTIONS Follow these instructions to correctly sharpen Rotary Lawn Mower
11. risk of personal 6 MAKE WORK AREA CHILD PROOF with injury padlocks or master switches 16 CHECK DAMAGED PARTS A guard or other 7 DON T FORCE THE GRINDER It will do part that is damaged or will not perform its the job better and safer if used as specified in intended function should be properly repaired this manual or replaced 8 USE THE RIGHT TOOL Don t force the grinder 17 NEVER LEAVE GRINDER RUNNING or an attachment to do a job for which it was not UNATTENDED TURN POWER OFF Do not designed leave grinder until it comes to a complete stop 9 WEAR PROPER APPAREL Wear no loose 18 KNOW YOUR EQUIPMENT Read this manual clothing gloves neckties or jewelry which may carefully Learn its application and limitations get caught in moving parts Nonslip footwear is as well as specified potential hazards recommended Wear protective hair covering to contain long halr 19 KEEP ALL SAFETY DECALS CLEAN AND LEGIBLE If safety decals become damaged 10 ALWAYS USE SAFETY GLASSES or illegible for any reason replace immediately 11 DO NOT OVERREACH Keep proper footing and balance at all times 20 Refer to replacement parts illustrations in this manual for the proper location and part numbers of safety decals DO NOT OPERATE THE GRINDER WHEN UNDER THE INFLUENCE OF DRUGS ALCOHOL OR MEDICATION SAFETY INSTRUCTIONS 10 IMPROPER USE OF GRINDING WHEEL MAY CAUSE BREAKAGE AND SERIOUS INJURY Grinding is a safe op
12. same way you grind a blade Move the brick back and forth until the surface of the wheel is free of debris ALWAYS WEAR SAFETY GOGGLES WHEN DRESSING A WHEEL Wiring Diagram for 1 2 Hp Model 440 with 09922 Motor WIRE NUT 8 di Q VHITE WIRING FOR 115 1 Wiring Diagram for 1 HP Model 450 with 09393 Motor HP MOTOR on I HP MOTOR SWITCH SWITCH WIRING FOR 115 VAC WIRING FOR 220 VAC EXPLODED VIEW AND PARTS LIST o Dia No Part No Description Dia Part No Description 10 32 x 1 2 Button Head Socket Cap Screw en Wheel Guard Maroon 1 4 20 x 1 2 Hex Head Cap Screw Wheel Guard Light Green 1 4 20 x 1 2 Hex Head Cap Screw Wheel Guard Forest Green 2 Prong Knob 5 16 18 x 3 4 Hex Head Cap Screw 10 x 5 8 Self Tapping Screw 1 4 28 x 1 4 Socket Head Set Screw u 5 8 11 Left Hand Hex Nut Thin 1 4 20 Wing Nut Motor to Switch Cord 1 2 HP 5 16 18 Hex Nut Full Motor to Switch Cord 1 HP 1 4 Lockwasher Main Power Cord 5 16 SAE Flat Washer m Plug Vac Hole K311501 5 16 Lockwasher 3707273 Stain Relief 3700077 8 OD x 1 Wide Grey Grind Wheel 24 Grit 3708514 Wheel Flange 8 OD x 1 Wide Ruby Grind Wheel 46 Grit 3708604 Warning Decal ic 3709767 Rubber Bumper 1HP Motor Model 450 Grinder 9 08461 Decal Wh
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