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Hitachi FDS 12DV Manual

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1. REPAIR GUIDE
Without fail, remove Type FEB 12 Battery from the main body of the tool before attempting repair work. Because
the tool is cordless, if the battery is left in and the switch is activated inadvertently, the motor will start rotating
unexpectedly and could cause serious injury.
1-1. Precautions in Disassembly and Reassembly of the Main Body
The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded
assembly diagram.
1-1-1. Disassembly
(1) Removal of the Drill Chuck [8]: (Fig. 7)
Remove the Drill Chuck [8] from the Spindle Gear and Set [14] of the fully assembled driver drill in
accordance with the following procedures.
(a) Set the Shift Knob [16] to the "L" position to shift the gears to the low-speed setting.
(b) Align the white line on the Cap [9] with the drill mark (
(c) Fully open the jaws of the Drill Chuck [8], and remove the M5 x 20 Flat Hd. Screw [7]. (Be sure to
remember that the M5 x 20 Flat Hd. Screw [7] is left-hand threaded, and must be loosened by turning it to
the right [clockwise].)
(d) Insert an M10 hex. bar wrench into the Drill Chuck [8], and strike it gently in a counterclockwise direction
with a wooden or plastic hammer to loosen it. After the drill chuck has been loosened, continue to rotate it
counterclockwise by hand to remove it from the main body.
Loosen
Drill Chuck [8]
(2) Disassembly of housing (B):
Remove the seven D3 x 14 Tapping Screws [4] which fix the main body. Then grasp the lower portions of
housing (A) and housing (B) where the battery is inserted, and gently separate them.
MODEL
Hex. bar wrench
Cap [9]
Drill mark
White line
Fig. 7
−1−
FDS 12DV
).
Shift Knob [16]

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Summary of Contents for Hitachi FDS 12DV

  • Page 1 MODEL FDS 12DV 1. REPAIR GUIDE Without fail, remove Type FEB 12 Battery from the main body of the tool before attempting repair work. Because the tool is cordless, if the battery is left in and the switch is activated inadvertently, the motor will start rotating unexpectedly and could cause serious injury.
  • Page 2 (3) After housing (B) has been removed, the parts inside may either be removed together in an assembled state, or removed individually. First, remove the Shift Arm [15] and Shift Knob [16], being very careful not to allow the Shift Spring [17] to fly out unexpectedly. (4) Removal of the Motor [21] (a) Take off the Cap [9], Spring Holder [10], Spring [11], Thrust Plate [12], and Steel Balls [13], in that order.
  • Page 3 (2) Connecting the Spindle and Gear Set [14] and the electric components assembled as described in Spindle and Gear Set [14] Para. (1) When connecting the Spindle and Gear Set [14] Internal wire (yellow) and the electric components assembled as Motor [21] described in Para.
  • Page 4 (b) When assembling the Cap [9] onto the components assembled as described in Para. (a) above, ensure that the white line on the Cap [9] is properly aligned with relation to the colored lead wires soldered to the Motor [21]. (See Fig. 10) (c) When assembling the Shift Arm [15] onto Shift Arm [15] the Spindle and Gear Set [14], ensure that...
  • Page 5 (g) Mount the components assembled as described in Para. (f) onto the components assembled as described in Para. (e). At this time, ensure that colored leadwires soldered to the Terminal [27] are properly aligned with relation to housing (A) and housing, (B). (See Fig. 16) Terminal [27] Internal wire (white) Internal wire (yellow)
  • Page 6: Standard Repair Time (Unit) Schedules

    2. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow FDS 12DV General Assembly Drill Chuck Housing Spring Holder (A)(B) Set Spring Shift Arm Thrust Plate Shift Knob Steel Ball DC-speed (4 pcs) control switch Spindle and...