Hitachi G 18MR, G 23MR Maintenance and Inspection, Replacing the depressed center wheel

Page 15

English

MAINTENANCE AND INSPECTION

WARNING: Be sure to switch power OFF and disconnect the plug from the receptacle during maintenance and inspection.

Using cracked, deformed or damaged wheels can lead to wheel breakage and resulting serious injury.

1.Replacing the depressed center wheel

Replace the depressed center wheel when it has been worn out to about 2-3/8" (60mm) in external diameter. Confirm that there is no crack or any damage to the depressed center wheel. If there is a crack or a transformation in the wheel, replace it immediately.

2.Inspecting the screws

Regularly inspect all screws and ensure that they are fully tightened. Should any of the screws be loosened, retighten them immediately.

WARNING: Using this grinder with loosened screws is extremely dangerous.

3.Confirm that there is no damage in the wheel guard, the electrical cord and the housing, etc.

Check that the on/off switch operates normally.

4.Inspecting the carbon brushes (Fig. 6)

The motor employs carbon brushes which are consumable parts. Replace the carbon brush with a new one when it becomes worn to its wear limit. Always keep carbon brushes clean and ensure that they slide freely within the brush holders.

Wear limit	No. of carbon
	brush

61

0.26" (6.5mm) 0.89" (22.5mm)

Fig. 6

CAUTION:

●Using this grinder with a carbon brush which is worn in excess of the wear limit will damage the motor.

NOTE: Use HITACHI carbon brush No. 61 indicated in Fig. 6.

◯ Replacing carbon brushes: <Disassembly>

(1) Loosen the D4 tapping screw retaining the brush cover and remove the brush

cover.

Carbon

Brush

Spring

Brush Holder

Fig. 7

15

Image 15

Contents Avertissement AdvertenciaAmoladora angular Contents Table DES MatieresÍndice Meanings of Signal Words Important Safety InformationGeneral Safety Rules SafetyEnglish Specific Safety Rules and Symbols Never operate without all guards in placeUse right tool Handle tool correctly Blades and accessories must be securely mounted to the toolKeep motor air vent clean Operate power tools at the rated voltageDouble Insulation for Safer Operation Make Them Available to Other Users and Owners of this Tool Specifications Functional DescriptionName of Parts Assembly and Operation ApplicationsPrior to Operation Mounting the wheel guard Use only properly rated depressed center wheelsCheck the push button Grinder Operation Depressed Center Wheel Assembly and Disassembly AssemblyDisassembly Inspecting the carbon brushes Fig Maintenance and InspectionReplacing the depressed center wheel Inspecting the screwsService parts list Service and repairsStandard Accessories AccessoriesSignification DES Mots D’AVERTISSEMENT Informations Importantes DE SécuritéAvertissement Lire et coxmprendre toutes les instructions SecuriteRegles Generale DE Securite Conserver CES InstructionsFrançais Regles DE Securite Specifiques ET Symboles Utiliser l’outil motorisé à la tension nominale Garder propres les évents d’air du moteurNe pas essuyer les parties en plastique avec du solvant Double Isolation Pour UN Fonctionnement Plus SUR NOM DES Parties Description FonctionnelleAvant L’UTILISATION Utilisations6600 t/mn ou plus Montage du capot couvre-meuleUtilisation DE LA Meuleuse Opération d’ajustement pour la finition souhaitée AssemblageDéassemblage Inspection des balais en carbone Fig Remplacement de la meule à dépression centraleEntretien ET Inspection Inspection des visListe des pièces de rechange Entretien et réparationAccessoires Accessoires StandardAccessoires SUR Option Significado DE LAS Palabras DE Señalización Información Importante Sobre SeguridadAdvertencia Lea y entienda todas las instrucciones SeguridadNormas Generales DE Seguridad Guarde Estas InstruccionesEspañol Normas Y Símbolos Específicos DE Seguridad Utilice la herramienta correcta Maneje correctamente la herramientaManeje con cuidado las herramientas eléctricas No limpie las partes de plástico con disolvente Aislamiento Doble Para Ofrecer UNA Operación MÁS Segura Descripción Funcional NomenclaturaEspecificaciones Montaje Y Operación AplicacionesAntes DE LA Operación Montaje del protector de la rueda Utilice ruedas de disco abombado de la capacidad apropiadaRPM o más Presione con poca fuerza la amoladora Operación DE LA Amoladora AngularCompruebe el botón pulsador Conecte la alimentación de la amoladora FigArmado Montaje Y Desmontaje DE LA Rueda DE Disco AbombadoMueva la amoladora en el sentido apropiado Ajuste la operación de acuerdo con el acabado deseadoDesarmado Inspección de la escobillas Fig Mantenimiento E InspecciónReemplazo de la rueda de disco abombado Inspección de los tornillosLista de repuestos Mantenimiento y reparaciónAccesorios Accesorios EstándarAccesorios Opcionales Page 6301DDCMPS2L G23MR 6200VVCMPS2L Hitachi Koki Canada Co