Makita UC3551A UC3551A UC4051A Instruction Manual - Page 17
Cleaning the oil guide
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014344 − Remove any projecting material, however small, with a special flat file (optional accessory). − Round off the front of the depth gauge again. Cleaning the guide bar and lubricating the return sprocket CAUTION: • Always wear safety gloves for this task. Burrs present a risk of injury. 006930 Check the running surfaces of the bar regularly for damage. Clean using a suitable tool, and remove burrs if necessary. If the chain saw receives frequent use, lubricate the return sprocket bearing at least once a week. Before adding new fresh grease, carefully clean the 2 mm hole on the tip of the guide bar, then force a small quantity of multi-purpose grease (optional accessory) into the hole. Cleaning the oil guide 1. Oil guide groove 2. Oil feed hole 1 2 014391 − Clean the oil guide groove and the oil feed hole in the bar at regular intervals. New saw chains Use two or three saw chains alternately, so that the saw chain, sprocket and running surfaces of the bar wear evenly. Turn the bar over when changing the chain so that the bar groove wears evenly. CAUTION: • Only use chains and bars which are approved for this model of saw (refer to "SPECIFICATIONS"). 1 1. Sprocket 014513 Before fitting a new saw chain, check the condition of the sprocket. CAUTION: • A worn sprocket damages a new saw chain. Have the sprocket replaced in this case. Always fit a new locking ring when replacing the sprocket. Maintaining the chain and run-down brakes The braking systems are very important safety features. Like any other component of the chain saw, they are subject to a certain degree of wear. They must be inspected regularly by MAKITA authorized or factory service centers. This measure is for your own safety. Replacing carbon brushes 1. Limit mark 1 001145 Remove and check the carbon brushes regularly. Replace when they wear down to the limit mark. Keep the carbon brushes clean and free to slip in the holders. Both carbon brushes should be replaced at the same time. Use only identical carbon brushes. 17