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10. REPAIR GUIDE
Be sure to remove the storage batteries from the main body before servicing. Inadvertent triggering of the switch
with the storage battery connected will result in the danger of accidental turning of the motor.
10-1. Precautions in Disassembly and Reassembly
The [Bold] numbers in the description below correspond to the item numbers in the Parts List and exploded
assembly diagram for the Model FDS 9DVA.
10-1-1. Disassembly
(1) Removal of Housing (B) [31]
Remove the seven Tapping Screws (W/Washers) D3 x 16 [26] secured to the main body. Gently open
Housing (A) [31] and Housing (B) [31] while holding their battery loading sections.
(2) After Housing (B) [31] has been removed, all the internal parts, assembled or separate, can be taken out as
they are. Lift the entire contents from Housing (A) [31] while holding the Motor [25] and Cap [4].
(3) Removal of the Drill Chuck [2] (See Fig. 4.)
(a) Turn the Motor [25] counterclockwise (when viewed from the rear) and remove it from the Rear Case [14].
Remove the Shift Knob [36] from the Shift Arm [16]. Take care not to remove the Shift Arm [16] from the
Rear Case [14] in this operation.
(b) Attach the motor spacer (an accessory of the special repair tool J-292, Code No. 316379) to the assembly
of the Drill Chuck [2], Cap [4], Front Case [9] and Rear Case [14] and then mount it in special repair tool
J-292 clamped in the vise as illustrated in Fig. 4. In this operation, check that the pinion press-fitted in the
special repair tool J-292 and Planet Gear (A) [21] are engaged properly.
(c) Turn the Cap [4] clockwise (when viewed from the front) until it can turn no further. In this position, the drill
mark " " on the Cap [4] is positioned on the Shift Arm [16] side. Secure the Slide Ring Gear [17] to
the Front Case [9] side with the Shift Arm [16].
(d) Turn the sleeve of the Drill Chuck [2] counterclockwise (when viewed from the front) to fully open the jaws
of the Drill Chuck [2]. Turn the Special Screw (Left Hand) M5 x 35 [1] clockwise and remove it. (Note that
the Special Screw is left-hand threaded.)
(e) Fit the hexagonal bar wrench M10 into the Drill Chuck [2] as illustrated in Fig. 4 and remove the Drill Chuck
[2] by turning the hexagonal bar wrench counterclockwise.
