Hitachi S18SB Instruction Manual - Page 13

English MAINTENANCE AND INSPECTION WARNING: Be sure to switch power OFF and disconnect the plug from the receptacle during maintenance and inspection. 1. 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 disc sander with loosened screws is extremely dangerous. 2. Confirm that there is no damage in the cord and the housing, etc. Furthermore, confirm that there is no abnormality in the activation of the switch. 3. Inspecting the carbon brushes (Fig. 5) 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. No. of carbon Wear limit brush 43 0.24" (6 mm) 0.67" (17 mm) CAUTION: Using this disc sander with a carbon brush which is worn in excess of the wear limit will damage the motor. Fig. 5 NOTE: Use HITACHI carbon brush No. 43 indicated in Fig. 5. ⅜ Replacing carbon brushes: Remove the brush caps (Fig. 1) with a slotted screwdriver. The carbon brushes can then be easily removed. 4. Service and repairs All quality power tools will eventually require servicing or replacement of parts because of wear from normal use. To assure that only authorized replacement parts will be used, all service and repairs must be performed by a HITACHI AUTHORIZED SERVICE CENTER, ONLY. 5. Service parts list A: Item No. B: Code No. C: No. Used D: Remarks 13