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10 — English

To replace the guard:

  Remove the battery pack from the grinder.

  Depress spindle lock and rotate clamp nut until spindle 

locks.

  Loosen and remove clamp nut from spindle using the 

wrench provided.

  Remove grinding wheel and disc flange.

  Unlock the guard clasp by pulling the clasp out, away 

from the grinder.

  Open clasp fully and twist guard to release it from the 

locking groove in the tool housing.

  Remove guard.

  Place the new guard on the shoulder of the bearing cap.

  Rotate guard to the correct position. Refer to 

Positioning 

the Guard

 earlier in this manual.

 NOTE:

 Be sure the raised ridge on the guard is seated in 

the groove on the bearing cap.

  Reassemble disc flange, grinding wheel, and clamp nut. 

Refer to 

Installing Grinding Wheel

 earlier in this manual.

  Tighten the clamp nut securely with the wrench provided.

BATTERY PACK REMOVAL AND 
PREPARATION FOR RECYCLING

WARNING:

Upon removal, cover the battery pack’s terminals with 
heavy-duty adhesive tape. Do not attempt to destroy or 
disassemble battery pack or remove any of its compo-
nents. Batteries must be recycled or disposed of properly. 
Also, never touch both terminals with metal objects and/
or body parts as short circuit may result. Keep away from 
children. Failure to comply with these warnings could 
result in fire and/or serious injury.

MAINTENANCE

WARNING:

When servicing, use only identical replacement parts. 

Use of any other part could create a hazard or cause 
product damage.

WARNING:

 

Always wear eye protection with side shields marked to 

comply with ANSI Z87.1, along with hearing protection. 

Failure to do so could result in objects being thrown into 

your eyes and other possible serious injuries.

WARNING:

To avoid serious personal injury, always remove the 

battery pack from the tool when cleaning, performing any 

maintenance, or when storing the tool.

GENERAL MAINTENANCE

Avoid using solvents when cleaning plastic parts. Most 

plastics are susceptible to damage from various types of 

commercial solvents and can be damaged by their use. Use 
clean cloths to remove dirt, dust, oil, grease, etc.

WARNING:

Do not at any time let brake fluids, gasoline, petroleum-

based products, penetrating oils, etc., come in contact 

with plastic parts. Chemicals can damage, weaken or 

destroy plastic which could result in serious personal 
injury.

REPLACING THE GUARD

See Figure 2, page 12.

WARNING:

Do not change or loosen guard screw. Failure to heed this 

warning may cause the guard to become loose during 

operation resulting in serious personal injury.

After extended use, the guard may wear and need replacing. 

If you drop the grinder and damage the guard it may also be 

necessary for you to replace it.

NOTE: Figures (illustrations) start on page 12 

after French and Spanish language sections.

This product has a Three-year 

Limited Warranty.

For Warranty details go to

www.ryobitools.com

NOTICE:

If the grinder is held in one spot too long, it will gouge 
and cut grooves in the workpiece. If the grinder is held 
at too sharp an angle, it will also gouge the workpiece 
because of concentration of pressure on a small area.

  Use just enough pressure to keep the grinder from 

chattering or bouncing. 

NOTE:

 Heavy pressure will decrease the grinder’s speed and 

put a strain on the motor. Normally the weight of the tool 
alone is adequate for most grinding jobs. Use light pressure 
when grinding jagged edges or loose bolts where there is the 
potential for the grinder to snag on the metal edge.

  Lift the grinder away from the workpiece before turning 

off the grinder.

OPERATION

Summary of Contents for P421

Page 1: ...rench Grinding Wheel Opera tor s Manual TABLE OF CONTENTS General Safety Rules 2 3 Specific Safety Rules 3 5 Symbols 6 Features 7 Assembly 7 8 Operation 8 9 Maintenance 10 Figures Illustrations 12 13...

Page 2: ...itions will reduce personal injuries Avoid accidental starting Ensure the switch is in the off position before plugging in Carrying power tools with your finger on the switch or plugging in power tool...

Page 3: ...s As appropriate wear dust mask hearing protectors gloves and workshop apron capable of stopping small abrasive or workpiece fragments The eye protection must be capable of stopping flying debris gene...

Page 4: ...ided by taking proper precautions as given below Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces Always use auxiliary handle if provided fo...

Page 5: ...injury Check damaged parts Before further use of the power tool a guard or other part that is damaged should be carefully checked to determine that it will operate properly and perform its intended fu...

Page 6: ...d safer SYMBOL NAME DESIGNATION EXPLANATION Safety Alert Indicates a potential personal injury hazard Read Operator s Manual To reduce the risk of injury user must read and understand operator s manua...

Page 7: ...nal injury n Inspect the tool carefully to make sure no breakage or damage occurred during shipping n Do not discard the packing material until you have care fully inspected and satisfactorily operate...

Page 8: ...e disc flange are engaged with the flats on the spindle Place the grinding wheel over the spindle WARNING Always install a grinding wheel with the depressed center against the disc flange Failure to d...

Page 9: ...s in front of the grinder This could result in serious injury because sparks and loose particles thrown from the grinding wheel would be directed toward the operator Always place the guard in the corr...

Page 10: ...e serious injuries WARNING To avoid serious personal injury always remove the battery pack from the tool when cleaning performing any maintenance or when storing the tool GENERAL MAINTENANCE Avoid usi...

Page 11: ...eur ou brancher un outil dont le commutateur est en position de marche peut causer un accident Retirer les cl s de r glage avant de mettre l outil en marche Une cl laiss e sur une pi ce rotative de l...

Page 12: ...lesquelles il n est pas con u peut pr senter du danger et entra ner des blessures Ne pas utiliser des accessoires qui ne sont pas sp cialement con us pour le mod le d outil ou qui ne sont pas recomman...

Page 13: ...rasives peuvent galement se briser Un rebond est attribuable une mauvaise utilisation de l outil ou au non respect des proc dures ou des conditions d utilisation Pour emp cher les rebonds respecter le...

Page 14: ...te consigne r duira les risques de blessures graves Protection auditive Porter une protecci n auditiva lors de l utilisation prolong e Le respect de cette r gle r duira les risques de blessures graves...

Page 15: ...Les r glementations locales ou gouvernementales peuvent interdire de jeter les piles dans les ordures m nag res Consulter les autorit s locales comp tentes pour les options de recyclage et ou l limin...

Page 16: ...s aient t remplac es Le non respect de cet avertissement pourrait entra ner des blessures graves AVERTISSEMENT Ne pas essayer de modifier cet outil ou de cr er des accessoires non recommand s pour l o...

Page 17: ...m plats au dessous de la bride circulaire s engagent dans ceux de l axe Placer la meule sur l axe AVERTISSEMENT Toujours installer les meules c t concave contre la bride circulaire Si cette pr cautio...

Page 18: ...er le garde de mani re ce qu il se trouve sur l avant de la meuleuse Les tincelles et la limaille pourraient tre projet es en direction de l op rateur et le blesser s rieusement Toujours installer le...

Page 19: ...ustrielle Ne pas essayer de d monter ou d truire le piles ni de retirer des composants quels qu ils soient Les piles puis es doivent tre recycl es ou limin es selon une m thode appropri e Ne jamais to...

Page 20: ...quipo de seguridad como mascarilla para el polvo calzado de seguridad casco y protecci n para los o dos en las circunstancias donde corresponda disminuye el riesgo de lesiones Evite un arranque accide...

Page 21: ...antales de trabajo que puedan detener peque os fragmentos y abrasivos o de la pieza de trabajo La protecci n ocular debe proteger de los residuos suspendidos en el aire que se generan por varias opera...

Page 22: ...o condiciones de trabajo incorrectas ypuedeevitarsetomandolasmedidasdeprecauci n adecuadas como las se aladas abajo Sujete firmemente la herramienta el ctrica y coloque el cuerpo y los brazos de maner...

Page 23: ...da adas Antes de seguir utilizando la herramienta es necesario inspeccionar cuidadosamente toda protecci n o pieza da ada para determinar si funcionar correctamente y desempe ar la funci n a la que es...

Page 24: ...erta de seguridad Indica un peligro posible de lesiones personales Lea el manual del operador Para reducir el riesgo de lesiones el usuario debe leer y comprender el manual del operador antes de usar...

Page 25: ...rma inadecuada podr a causar lesiones personales graves n Inspeccione cuidadosamente la herramienta para verificar que no haya sufrido ninguna rotura o da o durante el transporte n No deseche el mater...

Page 26: ...ueden enganchadas en las partes planas del husillo Coloque la muela abrasiva en el husillo ADVERTENCIA Siempre instale las muelas abrasivas con el centro hundido contra la brida del disco De otra mane...

Page 27: ...stalarse debidamente seg n el lado en que se monte el mango Nunca utilice la amoladora si la protecci n no est debidamente en su lugar ADVERTENCIA Nunca coloque la protecci n de manera que quede al fr...

Page 28: ...do tiempo deja marcas y ranuras en la pieza de trabajo Si se sostiene la amoladora a un ngulo muy pronunciado tambi n deja marcas en la pieza de trabajo debido a la concentraci n de presi n en un rea...

Page 29: ...va protecci n en la pesta a de la tapa del cojinete Gire la protecci n a la posici n correcta Consulte el apartado Posicionamiento de la protecci n previamente en este manual NOTA Aseg rese de que la...

Page 30: ...o necesita herramientas F Spindle broche husillo G Spindle lock blocage de la broche bloqueo del husillo H To loosen pour desserrer para aflojar I To tighten pour serrer para apretar Fig 3 A Side hand...

Page 31: ...IZQUIERDO DE LA AMOLADORA SIDE HANDLE ON RIGHT SIDE OF GRINDER POIGN E LAT RALE SUR LE C T DROIT DE LA MEULE MANGO LATERAL EN EL LADO DERECHO DE LA AMOLADORA INCORRECT INCORRECTA Fig 7 Fig 8 A B Fig 6...

Page 32: ...veuillez obtenir le num ro de s rie du mod le partir de la plaque de donn es du produit NUM RO DE MOD LE ______________________ NUM RO DE S RIE ______________________ COMMENT OBTENIR LES PI CES DE RE...

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