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ECHNICAL INFORMATION PRODUCT P 1/ 5 Model No. MT921 Description Finishing Sander ONCEPT AND MAIN APPLICATIONS Model MT921 has been developed on the design concept; "easy-to-control" is the key factor to a finishing sander with strong marketability. The main benefits are: Ergonomic grip contoured for easy handling both in single- and double-handed operation Dimensions: mm (")
P 2/ 5 epair CAUTION: Unplug the machine for safety before repair/ maintenance in accordance with the instruction manual! [1] NECESSARY REPAIRING TOOLS Code No. Description Use for Bearing setting pipe 18-10.2 Removing Armature 1R027 Removing Ball bearing 1R269 Bearing extractor [2] Disassembly/ Assembly [2]-1.
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P 3/ 5 epair [2] Disassembly/ Assembly Fig. 9 [2]-1. Armature (cont.) DISASSEMBLING 1R027 9) Remove Armature from Bearing box by striking the armature shaft end. When it is difficult to remove Armature in the above manner, put Bearing box on U-shape base of arbor press, then press down Ball bearing 6200LLB of Armature using 1R027 and arbor press.
P 4/ 5 ircuit diagram Fig. D-1 Color index of lead wires' sheath Black White Orange Purple Field Brush holder A Brush holder B Terminal block (if used) Viewed from Top cover Switch Brush Brush holder A holder B Noise suppressor (if used) Blue color is used for some countries.
P 5/ 5 iring diagram Fig. D-2 Field lead wire Field lead wire Connect Insulated terminals A and B Fix Field lead wires with Brush holders A and B. with Lead wire holders And set each Brush holders carefully in to prevent slacks near place so as not to put on Areas A and B Armature.