Hitachi DH40FA Instruction Manual - Page 16

English O 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. O 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. O 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 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. Crank Case Cover • 9 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. Fig. 18 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. 16