9Maintenance scheduleOperating hour BeforeOperationDaily(10 h) 25 h 50 h Ifrequired Corresponding pageWhole unit Visually inspect fordamaged parts8All fixing screws and nuts Tighten 8Chain oil feed port Clean 8Guide bar Clean the groove and thechain oil feed port8Visually inspect 8Supply grease to the nose 8Gear case Supply grease 8Drive axle Supply grease 8Sprocket Visually inspect 8Saw chain Replace or ask forsharpening8Power unit Refer to the instruction manual of the power unitTroubleshootingProblem Probable cause SolutionThe motor does not start. Refer to the instruction manual of the power unit.The motor stops soon after its start.The maximum speed is limited.The saw chain does not move.Stop the motor immediately!The guide bar is bent or damaged. Replace the guide bar.A twig is caught by the saw chain. Remove the foreign matter.The drive system does not work properly. Ask Makita authorized service center toinspect and repair it.The unit vibrates abnormally.Stop the motor immediately!The drive system does not work properly. Ask Makita authorized service center toinspect and repair it.The saw chain does not stop.Stop the motor immediately!The power unit does not work properly. Refer to the instruction manual of the powerunit.Chain oil is not supplied. The oil tank is empty. Fill the oil tank with chain oil.The chain-oil feed port is dirty. Clean the chain-oil feed port on the unit andguide bar.The adjusting screw of the chain-oil feed rateis improperly set.Set the adjusting screw properly.Technical dataModel EY401MPDimensions (L x W x H) mm 1,166 x 74 x 105Mass kg 1.0Guide bar length mm 255 (10”)Saw chain 91VXL-39EChain gauge inch 0.050”Number of sprocket teeth 7Chain oil Makita genuine chain oilChain oil pump Plunger pump(Self lubricating type)Chain oil tank capacity ml 120Gear ratio (speed increasing) 0.94