Makita HCU02C1 Owners Manual - Page 14
Cleaning guide bar, Cleaning the oil discharge hole
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008633 Sharpen the saw chain when: − Mealy sawdust is produced when damp wood is cut; − The chain penetrates the wood with difficulty, even when heavy pressure is applied; − The cutting edge is obviously damaged; − The saw pulls to the left or right in the wood. The reason for this behaviour is uneven sharpening of the saw chain, or damage to one side only. Sharpen the saw chain frequently, but remove only a little material each time. Two or three strokes with a file are usually sufficient for routine resharpening. When the saw chain has been resharpened several times, have it sharpened in a MAKITA specialist repair shop. File and file guiding − Use a special round file (optional accessory) for saw chains, with a diameter of 4 mm, to sharpen the chain. Normal round files are not suitable. − The file can be guided more easily if a file holder (accessory) is employed. The file holder has markings for the correct sharpening angle of 30 ° (align the markings parallel to the saw chain) and limits the depth of penetration (to 4/5 of the file diameter). Guide the file as shown in the figure. − After sharpening the chain, check the height of the depth gauge using the chain gauge tool (optional accessory). 006929 − Remove any projecting material, however small, with a special flat file (optional accessory). − Round off the front of the depth gauge again. − Wash away dust and particles from saw chain after adjusting the height of depth gauge. Cleaning guide bar 2 1 1. File forward stroke 2. 1/5 of the file diameter 011075 − The file should only engage the material on the forward stroke. Lift the file off the material on the return stroke. − Sharpen the shortest cutter first. The length of this cutter is then the gauge dimension for all other cutters on the saw chain. − Guide the file as shown in the figure. 010924 Chips and sawdust will build up in the guide bar groove, clogging it and impairing oil flow. Always clean out the chips and sawdust when sharpening or replacing the saw chain. Cleaning the oil discharge hole Small dust or particles may be built up in the oil discharge hole during operation. Small dust or particles built up in the oil discharge hole may impair the oil discharge flow and cause an insufficient lubrication on the whole saw chain. When a poor chain oil delivery occurs at the top of guide bar, clean the oil discharge hole 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 saw chain ".) 14