Makita 4390DW Owners Manual - Page 7

If you wish to charge two battery cartridges, allow 15 minutes between chargings on the fast charger. Installing or removing saw blade CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before installing or removing the blade. Loosenthe bladesecuring boltfully with the hex wrench. Keepthe backedge of the blade against the roller and insert the blade between the blade clamp and the slider as far as it will go. Makesurethat you are inserting the blade into the proper position. Roller Blade clamp Blade Fit the pin on the slider in the hole in the blade shank. Note : The hole in the blade shank will be aligned with the pin on the slider when the blade shank hits against the spring pin on the slider. Blade clamp Blade shank Tighten the bolt securely while making sure that the blade will not be extracted even though you try to pull it out. CAUTION : If you tighten the bolt without the pin on the slider fitting properly in the hole in the blade shank, the pin or the blade shank will be damaged. This may cause the blade to be extracted unexpectedIy during operation. Slider y