Makita BUC121 Instruction Manual

Also see for BUC121: Technical information Instruction manual Instruction manual Instruction manual Instruction manual

Contents

13When a poor chain oil delivery occurs at the top ofguide bar, clean the filter as follows.Remove the battery cartridge from the tool.Remove the sprocket cover and saw chain from the tool.(Refer to the section titled " Installing or removing sawchain ".)Fig.22Remove the push nut using a slotted bit screwdriver witha slender shaft or the like.Fig.23Take the filter out of the chain saw and remove smalldust or particles from it. When the filter is too dirty,replace it with a new one.Insert the battery cartridge into the tool.Fig.24Pull the switch trigger to flow built-up dust or particles offthe oil discharge hole by discharging chain oil.Remove the battery cartridge from the tool.Fig.25Insert the cleaned oil filter into the oil discharge hole.When the filter is too dirty, replace it with a new one.Fig.26Insert the push nut with its correct side facing up asshown in the figure into the oil discharge hole to securethe filter. When the filter cannot be secured with adisfigured push nut, replace the push nut with a newone.Reinstall the sprocket cover and saw chain on the tool.Replacing the sprocketBefore fitting a new saw chain, check the condition of thesprocket.Fig.27CAUTION:• A worn sprocket will damage a new saw chain.Have the sprocket replaced in this case. Thesprocket need to be installed so that it alwaysfaces as shown in the figure.Fig.28Always fit a new locking ring when replacing thesprocket.Replacing carbon brushesFig.29Remove and check the carbon brushes regularly.Replace when they wear down to the limit mark. Keepthe carbon brushes clean and free to slip in the holders.Both carbon brushes should be replaced at the sametime. Use only identical carbon brushes.Use a screwdriver to remove the brush holder caps.Take out the worn carbon brushes, insert the new onesand secure the brush holder caps.Fig.30Storing toolClean the tool before storing. Remove any chips andsawdust from the tool after removing the sprocket cover.After cleaning the tool, run it under no load to lubricatethe saw chain and guide bar.Cover the guide bar with the scabbard.Remove oil from the oil tank to empty it and place thechain saw with the tank cap facing upward.To maintain product SAFETY and RELIABILITY, repairs,any other maintenance or adjustment should beperformed by Makita Authorized Service Centers,always using Makita replacement parts.ACCESSORIESCAUTION:• These accessories or attachments arerecommended for use with your Makita toolspecified in this manual. The use of any otheraccessories or attachments might present a risk ofinjury to persons. Only use accessory orattachment for its stated purpose.If you need any assistance for more details regardingthese accessories, ask your local Makita Service Center.• Various type of Makita genuine batteries andchargers• Saw chain• Scabbard• Guide bar complete• File