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LIST No. LIST No. WR 16SE: E727 xxx. 2014 Sep. 2014 PRODUCT NAME Hitachi Impact Wrench WR 16SE Model CONTENTS REPAIR GUIDE ----------------------------------------------------------------------------------------------------------------- 1 1. Precautions on disassembly and reassembly ------------------------------------------------------------- 1 STANDARD REPAIR TIME (UNIT) SCHEDULE ---------------------------------------------------------------------- 11 International Sales Division...
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1. Precautions on disassembly and reassembly [Bold] numbers in the descriptions below correspond to the numbers in the Parts List and exploded assembly diagram for the Model WR 16SE. Disassembly 1. Removal of the hammer case ass’y (1) Insert a flat-blade screwdriver into a gap between Bumper (A) [1] and the Hammer Case Ass'y [3], and then remove Bumper (A) [1].
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3. Removal of housing (A).(B) set (1) Remove the eight Tapping Screws D4 x 20 [42]. You can now remove housing (B) of Housing (A).(B) Set [29]. (2) Remove the two Tapping Screws D4 x 16 [37] and the Cord Clip [36]. You can now remove Inner Cover (A) [23], Rotor Ass'y [25], Stator IGBT PCB [28], Controller (A) [33], Controller (B) [40], Switch [32], and Cord [39] together.
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5. Disassembly of the stator IGBT PCB, inner cover (A), and rotor (1) Firmly hold Inner Cover (A) [23] so as not to be attracted by the magnetic force of the Rotor Ass'y [25], and then pull out the stator of the Stator IGBT PCB [28] in direction “A” as shown below. (2) Keep Inner Cover (A) [23] away from the fan of the Rotor Ass'y [25], use a hand press or similar tool to press the end of the pinion of the Rotor Ass'y [25], and then remove Inner Cover (A) [23] from the Rotor Ass'y [25].
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Reassembly Reverse the disassembly procedures above to reassemble the impact wrench. However, when reassembling the impact wrench, pay particular attention to the following items. 1. Reassembly of the power supply portion and its vicinity (1) For replacement of the Switch [32], Controller (A) [33], Controller (B) [40], and the Stator IGBT PCB [28], connect these parts correctly with wires according to the wiring diagram.
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Fig. 5 Earth terminal [28] Insert the earth terminal into a gap between the housing rib, screw boss, and Stator IGBT PCB [28]. Screw boss Push the connector cable and internal wire into the wiring groove for internal wire. [32] Push the connector cable and internal wire into a gap between the Switch [32] and housing (A).
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2. Reassembly of the impact mechanism components (1) Mount two Washers (B) [12], Hammer Spring (A) [13], Washer (A) [14], and Spindle (A) [17] in this order on Hammer (A) [8], which contains the twenth-nine Steel Balls D3.97 [9]. (2) Match the peak of the cam groove of Spindle (A) [17] with the steel ball insertion groove of Hammer (A) [8].
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Application of lubricant (1) Apply Nippeco SEP-3A grease to the following: • Pinion tooth flanks of the Rotor Ass’y [25] • Tooth flanks of the Ring Gear [19] • Tooth flanks and inner circumference of the Idle Gear Set (2 pcs.) [18] •...
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Wiring diagram Carefully ensure that wiring is accomplished as illustrated below, because incorrect wiring will result in inadequate or reverse rotation. Fig. 7 • Wiring diagram Stator IGBT PCB [28] Insert the earth terminal here among the housing rib, screw boss, and Stator IGBT PCB [28].