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manual abstract
14 Center Pin Guide Plate Core Bit Core Bit Tip Fig. 15 Fig. 16 3. Dismounting (Fig. 17) Remove the core bit shank from the rotary hammer and strike the head of the core bit shank strongly two or three times with a manual hammer holding the core bit, then the thread becomes loose and the core bit can be removed. Core Bit Shank Fig. 17 English 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 drill bits Since use of a dull tool will cause motor malfunctioning and degraded efficiency, replace the drill bit with a new one or resharpening without delay when abrasion is noted. 2. Inspecting the mounting screws Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. WARNING: Using this rotary hammer with loosen screws is extremely dangerous. 3. 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. 4. Inspecting the carbon brushes: (Fig. 18) The motor employs carbon brushes which are consumable parts. When they become worn to or near “wear limit”, it could result in motor trouble. When an auto-stop carbon brush is equipped, the motor will stop automatically. At that time, replace both carbon brushes with new ones which have the same carbon brush Nos. shown in the figure. In addition, always keep carbon brushes clean and ensure that they slide freely within the brush holders. CAUTION: Using this rotary hammer with a carbon brush which is worn in excess of the wear limit will damage the motor. 73 0.28" (7 mm) 0.67" (17 mm) No. of carbon brush Wear limit Fig. 18 NOTE: Use HITACHI carbon brush No.73 indicated in Fig. 18 English . Replacing carbon brushes: (For parts name, refer to Fig. 1) Loosen the two set screws and remove the tail cover. Remove the brush caps and carbon brushes. After replacing the carbon brushes, tighten the brush caps securely and to install the tail cover with securely tightening two set screws. 5. How to replase grease This machine is full air-tight construction to protect against dust and to prevent lubricant leakage. Therefore, the machine can be used without lubrication for long periods. Replace the grease as described below. . Grease replacement period After purchase, replace grease after every 6 months of usage. Ask for grease replacement at the nearest HITACHI Authorized Service Center. Proceed for replacement of grease. . Grease replenishment CAUTION: Before replenishing the grease, turn the power off and pull out the power plug. (1) Remove the crank case cover and wipe off the grease inside. (2) Apply 0.7 oz (20 g) of HITACHI Electric Crank Case Cover Hammer Grease A (standard accessory, contained in tube) to the crank case. As the tube contains 1 oz (30 g) of grease, supply 2/3 of the contained grease. (3) After replenishing the grease, install the crank case securely. NOTE: The HITACHI Electric Hammer Grease A is of the lower viscosity type. When the supplied grease tube is consumed, purchase from a HITACHI Autorized Service Center. 6. 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. Fig. 19 English ACCESSORIES WARNING: Accessories for this power tool are mentioned in this Instruction Manual. The use of any other attachment or accessory can be dangerous and could cause injury or mechanical damage. NOTE: Accessories are subject to change without any obligation on the part of the HITACHI. STANDARD ACCESSORIES (1) Case (Molded plastic) (Code No. 313097) ............................................................. 1 (2) Side Handle (Code No. 313078) ............................................................................. 1 (3) Stopper (Code No. 971786) .................................................................................... 1 (4) Allen Wrench 4 mm (Code No. 944458)................................................................ 1 (5) Allen Wrench 5 mm (Code No. 944459)................................................................ 1 (6) Hammer Grease A (Code No. 981840) .................................................................. 1 (7) Dust Cover (Code No. 993245) .............................................................................. 1 OPTIONAL ACCESSORIES.....sold separately For accessories in detail please call HITACHI AT 1-800-59-TOOLS 1. Through-hole drilling (Rotation + Hammering) (1) Drill bit (Spline shank) External dia. Overall length Code No. 1/2" (12.7 mm) 985374 1" (25.4 mm) 16"(400 mm) 985375 1-1/2" (38.1 mm) 985376 2. Anchor hole drilling (Rotation + Hammering) (3) Cotter (Code No....