Hitachi DV 14DSDL Service Manual page 3

5. Removal of the drill chuck and drive unit
(1) Attach the spindle lock jig (an accessory of special repair tool J-355) to the spindle of Front Case [10],
and then mount it in special repair tool J-355 clamped in the vise as illustrated in Fig. 1.
(2) Turn the sleeve of Drill Chuck 13VLRL-N [2] counterclockwise (as viewed from the front) to fully open
the jaws of Drill Chuck 13VLRL-N [2]. Turn the Flat Hd. Screw (A) (Left Hand) M6 x 25 [1] clockwise
and remove it. (Note that this screw is left-hand threaded.)
(3) Fit the hexagonal bar wrench (M10) into Drill Chuck 13VLRL-N [2] as illustrated in Fig. 1, and then
remove Drill Chuck 13VLRL-N [2] by turning the hexagonal bar wrench counterclockwise.
(4) Remove Dial Holder (B) [6] and the Click Spring [11] from the Front Case [10].
(5) Disassembly of the clutch mechanism
Turn the Nut [7] counterclockwise to remove it from the Front Case [10]. Take out the Spring [8],
Stopper (A) [28], and Stopper Spring [29] in this order.
NOTE: Do not disassemble the Front Case [10].
Fig. 1
Hexagonal bar wrench
Special repair tool (J-355)
6. Disassembly of the armature unit
(1) Remove the Magnet [37] from the Armature and Pinion Set [36].
Note that the Magnet [37] has strong magnetic force. Hold the Motor Spacer [35] securely and pull it
toward the back of the Armature and Pinion Set [36] to remove.
NOTE: When removing the Magnet [37], note that the ball bearing and washer behind the
Armature and Pinion Set [36] may be attracted to the Magnet [37] and come off the
Armature and Pinion Set [36].
(2) Remove the Motor Spacer [35].
Remove the Motor Spacer [35] from the Armature and Pinion Set [36]. If the Motor Spacer [35] is too
tight to remove, push up the head of the armature shaft in the Armature and Pinion Set [36] while
holding the Motor Spacer [35].
7. Disassembly of the power supply unit
Disconnect the two soldered internal wires (red and black) coming from the Brush Block [38], and the
three soldered internal wires (red, black and white) coming from the Controller Terminal Set [46] from
the DC-Speed Control Switch [50]. The power supply unit can now be disassembled.
Spindle
Vise
Drill Chuck 13VLRL-N [2]
Dial Holder (B) [6]
Front Case [10]
-2-