Fig. 4[3] DISASSEMBLY/ASSEMBLY[3]-1. ChuckDISASSEMBLING1R312Ring 28Rubber ring 30Chuck coverRelease coverChuck ringSpring guideSpring guideCompression spring 46Toolretainer1. Set the machine to 1R312 or the like,and remove Tool holder cap by pryingoff with a slotted screwdriver.2. Insert the dummy shank of 1R363 into Tool holder,and lock it same way as you do for a real bit.Press down Ring 28 under Ring spring 25 by turningM8 Nut of 1R363 clockwise using a socket wrench 13,and remove Ring spring 25 using 1R003 and 1R212.3. Remove Ring 28, Chuck cover, Rubber ring 30,Chuck ring and Release cover from Tool holder.4. Remove a pair of Tool retainer by pressing downSpring guide. Then separate Spring guides andCompression spring 46 from Tool holder.Dummy shank ofSDS-MAX bitTool holder capChuck section can be disassembled as drawn in Fig. 4.Tool holder capR epairP 4/ 19ASSEMBLINGAssemble Chuck section by reversing the disassembly procedure.Refer to Fig. 4.Note: It is difficult to set Tool holder cap in place by hand.Put Tool holder cap on floor, and push Tool holder ofthe machine to the cap while making use of the machineweight.Fig. 5Ring 28Ring spring 251R363Socket wrench 131R0031R212