Hercules 56903 Owner'S Manual & Safety Instructions Download Page 9

Page 9

For technical questions, please call 1-888-866-5797.

Item 56903 
        

Installing a Threaded Accessory

TO PREVENT INJURY:  Wear heavy-duty work 
gloves when handling wire wheels and brushes.   
These accessories are sharp and can cause 
injury.  Do not exceed maximum rated speed of 
brush.  Do not use a damaged brush.  Replace 
damaged brushes immediately.  Damaged 
or worn brushes will forcefully shoot wires 
into all objects not covered by the guard.

1.  The accessory MUST be:

•  rated to at least 8500 RPM
•  no larger than 5" in diameter
•  fitted with a threaded opening of 5/8" x 11 TPI.
•  undamaged
•  a sanding disc and backing pad, a sanding 

flap disc, a wire wheel or a wire cup 
brush (accessories not included).

2.  Press in and hold the Spindle Lock Button 

to prevent the Spindle from turning.

3.  Remove the Flange Nut and the Outer 

Flange and keep in a safe place.

4.  Thread disc accessory firmly onto the 

Spindle.  Wrench tighten onto the Spindle.

Workpiece and Work Area Set Up

1.  Designate 

a work area that is clean and well-lit.  

The work area must not allow access by children 
or pets to prevent distraction and injury.

2.  Secure loose workpieces using a vise or clamps 

(not included) to prevent movement while working.

3.  There must not be hazardous objects, such 

as utility lines or foreign objects, nearby that 
will present a hazard while working.

4.  You must use personal safety equipment including, 

but not limited to, ANSI-approved eye and hearing 
protection, as well as heavy-duty work gloves.

5.  Before beginning work, provide for sparks and 

debris that will fly off the work surface.

General Operation

TO PREVENT SERIOUS INJURY:  Grip 
the tool firmly in both hands.

1.  Insert a fully charged Battery Pack into the 

Grinder, making sure it clicks in place securely.

2.  Press the back of the Switch down and 

then it push forward to start the tool.  To 
turn tool OFF, release the Switch.

3.  To lock the tool on, press the back of the Switch 

down and push Switch forward.  Then press 
the front of the Switch down into the groove in 
front.  To release, press the back of the Switch.

4.  Allow the tool to come up to full speed 

before touching the work material.

For grinding or sanding operations,

 apply the 

wheel or disc to the work material at a 10°– 15° 

angle, allowing the tool to operate at full speed.  
If the tool bogs down, use lighter pressure.
To create a smoother surface, keep the 
tool moving over the work surface.

For abrasive cutting-off operations,

 

apply the cut-off wheel straight into the work 
material using only the edge of the wheel, 
allowing the tool to operate at full speed.  If 
the tool bogs down, use lighter pressure.

WARNING! TO PREVENT SERIOUS INJURY:  

Do not grind with the side of the cut-off 
wheel.

 

 Abrasive cut-off wheels are intended 

for peripheral grinding; side forces applied to 
these wheels may cause them to shatter.

NOTICE:

  TO PREVENT TOOL DAMAGE:  

Only use the tool for 15-20 minutes at a time.  
Allow the tool to cool completely before next use.
5. 

TO PREVENT ACCIDENTS, AFTER USE: 

Turn off the tool. 

WARNING!  TO PREVENT SERIOUS INJURY:  
Allow the tool to come to a complete stop before 
setting it down.

 

Remove the Battery Pack.  Clean, then store 
the tool indoors out of children’s reach.

Summary of Contents for 56903

Page 1: ...revent serious injury User must read and understand Owner s Manual SAVE THIS MANUAL When unpacking make sure that the product is intact and undamaged If any parts are missing or broken please call 1 888 866 5797 as soon as possible Reference 56903 Model HC61SB Owner s Manual Safety Instructions 20d ...

Page 2: ...or wrench before turning the power tool on A wrench or a key left attached to a rotating part of the power tool may result in personal injury Do not expose power tools to rain or wet conditions Water entering a power tool will increase the risk of electric shock Personal Safety 1 Stay alert watch what you are doing and use common sense when operating a power tool Do not use a power tool while you ...

Page 3: ...3 Do not use accessories which are not specifically designed and recommended by the tool manufacturer Just because the accessory can be attached to your power tool it does not assure safe operation 4 The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool Accessories running faster than their RATED SPEED can break and fly apart 5 The outside diameter a...

Page 4: ...fety of the power tool is maintained 1 Maintain labels and nameplates on the tool These carry important safety information If unreadable or missing contact Harbor Freight Tools for a replacement 2 Avoid unintentional starting Prepare to begin work before turning on the tool 3 Do not depress the spindle lock when starting or during operation 4 Do not leave the tool unattended when the Battery Pack ...

Page 5: ...perator The guard helps to protect operator from broken wheel fragments and accidental contact with wheel 3 Wheels must be used only for recommended applications For example do not grind with the side of cut off wheel Abrasive cut off wheels are intended for peripheral grinding side forces applied to these wheels may cause them to shatter 4 Always use undamaged wheel flanges that are of correct si...

Page 6: ...se tools with the lowest vibration when there is a choice between different processes 5 Include vibration free periods each day of work 6 Grip tool as lightly as possible while still keeping safe control of it Let the tool do the work 7 To reduce vibration maintain the tool as explained in this manual If any abnormal vibration occurs stop use immediately SAVE THESE INSTRUCTIONS Extension Cords Ext...

Page 7: ... section Charging Charge battery before using this tool Follow instructions included with battery charger Battery Pack and Charger sold separately Adjusting the Wheel Guard TO PREVENT SERIOUS INJURY Do not operate this tool without the Wheel Guard properly installed 1 Pull out the Wheel Guard Lock Lever 2 Rotate the Wheel Guard as needed to shield you during the planned work 3 Push the Wheel Guard...

Page 8: ...form a ring test on the wheel unless wheel is smaller than 4 or is an unusual shape as follows a Suspend wheel using a dowel or finger through the arbor hole Tap Wheel Here 45 45 45 45 45 45 45 45 Hang Wheel from Dowel V V E E R R T T I I C C A A L L C C E E N N T T E E R R b Tap the flat side of the wheel with a light non metallic object such as a screwdriver handle at a point 45 from the vertica...

Page 9: ... beginning work provide for sparks and debris that will fly off the work surface General Operation TO PREVENT SERIOUS INJURY Grip the tool firmly in both hands 1 Insert a fully charged Battery Pack into the Grinder making sure it clicks in place securely 2 Press the back of the Switch down and then it push forward to start the tool To turn tool OFF release the Switch 3 To lock the tool on press th...

Page 10: ...l Press reset button on tool 3 Have technician service tool Tool operates slowly Excess pressure applied to workpiece Decrease pressure allow tool to do the work Excessive noise or rattling Internal damage or wear bearings for example Have technician service tool Overheating 1 Forcing tool to work too fast 2 Blocked motor housing vents 1 Allow tool to work at its own rate 2 Wear ANSI approved safe...

Page 11: ... 22 6 20 Spindle Lock 1 21 Spring 1 22 O Ring 1 23 Shaft Circlip 1 24 Side Handle 1 25 nut M6 x 5 1 26 Pinion 1 27 Small Gear 1 Part Description Qty 28 Ball Bearing 608 LUV 1 29 Press Platen 1 30 Screw M4 x 10 2 31 Rotor 1 32 Ball Bearing 696 RS 1 33 Stator 1 34 Left Housing 1 35 Switch Cover 1 36 Lever 1 37 Torsional Spring 1 38 Switch Rocker 1 39 Locating Pin 1 40 Switch 1 41 Controller 1 42 Bat...

Page 12: ...laint must accompany the merchandise If our inspection verifies the defect we will either repair or replace the product at our election or we may elect to refund the purchase price if we cannot readily and quickly provide you with a replacement We will return repaired products at our expense but if we determine there is no defect or that the defect resulted from causes not within the scope of our ...

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