Hitachi C12RSH User Guide - Page 63

English MAINTENANCE AND INSPECTION WARNING To avoid an accident or personal injury, always confirm the trigger switch is turned OFF and that the power plug has been disconnected from the receptacle before performing any maintenance or inspection of this tool. Report to qualified person as soon as possible, if you discover the fault of machine including guards or blade saw. 1. Inspecting the saw blade Always replace the saw blade immediately upon the first sign of deterioration or damage. A damaged saw blade can cause personal injury and a worn saw blade can cause ineffective operation and possible overload to the motor. CAUTION Never use a dull saw blade. When a saw blade is dull, its resistance to the hand pressure applied by the tool handle tends to increase, making it unsafe to operate the power tool. 2. Inspecting the mounting screws Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, re-tighten them immediately. Failure to do so could result in serious hazard. 3. Inspecting the carbon brushes (Fig. 37) The motor employs carbon brushes which are consumable parts. Since an excessively worn carbon brush can result in motor trouble, replace the carbon brushes with new ones having the same carbon brush No. shown in the figure when it becomes worn to or near the "wear limit". In addition, always keep carbon brushes clean and ensure that they slide freely within the brush holders. 4. Replacing a carbon brushes Disassemble the brush cap with a slotted-head screwdriver. The carbon brushes can then be easily removed. 5. Maintenance of the motor The motor unit winding is the very "heart" of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water. 6. Inspecting the lower guard for proper operation Before each use of the tool, test the lower guard (Fig. 4) to assure that it is in good condition and that it moves smoothly. Never use the tool unless the lower guard operates properly and it is in good mechanical condition. 7. Storage After operation of the tool has been completed, check that the following has been performed: (1) Trigger switch is in OFF position, (2) Power plug has been removed from the receptacle, When the tool is not in use, keep it stored in a dry place out of the reach of children. 8. Replacement of guard After long-term use, the blade slot in the guard may widen and require replacement. If the blade slot should widen, replace the guard with a new one (Fig. 38). After replacing, make a groove on it. Refer to "4. Cutting a groove on the guard" on page 57. 9. Replacement of Poly-V-Belt The power of the motor is transmitted to the saw blade by a Poly-V-Belt. When the Poly-V-Belt is broken or damaged, remove the belt cover by loosening the four 5 mm screws (Fig. 2) and replace the damaged one with the new one. When connecting the belt on pulleys, first connect 2 or 3 teeth of Poly-V-Belt to the grooves of the pulley (A) and pulley (B). Then turning the pulley (A) and pulley (B), connect all 13 teeth of the belt to the pulleys (Fig. 39). 10. Lubrication Lubricate the following sliding surfaces once a month to keep the power tool in good operating condition for a long time. Use of machine oil is recommended. Oil supply points: * Rotary portion of hinge * Rotary portion of holder (A) * Rotary portion of vise assembly 11. Cleaning Periodically remove chips and other waste material from the surface of the power tool with a damp, soapy cloth. To avoid a malfunction of the motor, protect it from contact with oil or water. If the laser line becomes invisible due to chips and the like adhered onto the window of the laser marker's lightemitting section, wipe and clean the window with a dry cloth or a soft cloth moistened with soapy water, etc. 12. Service parts list A : Item No. B : Code No. C : No. Used D : Remarks CAUTION Repair, modification and inspection of Hitachi Power Tools must be carried out by a Hitachi Authorized Service Center. Especially laser device should be maintained by the authorised agent by laser manufacturer. Always assign the repair of laser device to Hitachi Authorised Service Center. This Parts List will be helpful if presented with the tool to the Hitachi Authorized Service Center when requesting repair or other maintenance. In the operation and maintenance of power tools, the safety regulations and standards prescribed in each country must be observed. MODIFICATIONS Hitachi Power Tools are constantly being improved and modified to incorporate the latest technological advancements. Accordingly, some parts (i.e. code numbers and/or design) may be changed without prior notice. NOTE Due to HITACHI's continuing program of research and development the specifications herein are subject to change without prior notice. 62