Hitachi DS 12DM, Технические данные и руководство по обслуживанию

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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 danger of accidental turning of the motor.
10-1. Precautions in Disassembly and Reassembly
The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded
assembly diagram for the Model DS 12DVB.
10-1-1. Disassembly
(1) Removal of the Hook Ass'y [43]
Remove the Special Screw M5 [48] with a flat-blade screwdriver or a coin. Remove the Hook Ass'y [43] and
the Hook Spring [47].
(2) Removal of the Carbon Brushes [33]
Remove the Brush Cap [34] first then pry the Carbon Brush [33] off with a flat-blade screwdriver (at the
position of collars). Remove the Brush Caps [34] and the Carbon Brushes [33] at both sides.
(3) Removal of the Drill Chuck [2]
Perform the following steps (a) and (b) with the main unit mounted in the vise for removal of the Drill Chuck
[2]. At this time, it is recommended to sandwich a cloth between the main unit and the vise to prevent the
Housing (A). (B) Set [38] from being scratched.
(a) Fully open the jaws of the Drill Chuck [2] and remove the Special Screw (Left Hand) M6 x 23 [1] by turning
clockwise (be careful that it is a left-handed screw).
(b) Hold the hexagonal portion at the tip of the Drill Chuck [2] with a 19-mm socket wrench as shown in
Fig. 1 then turn it counterclockwise to remove the Drill Chuck [2].
(4) Adjust the Clutch Dial [4] to "1".
(5) Disassembly of the main unit
Remove the eight Tapping Screws (W/Flange) D3 x 16 [35] from the main unit. Holding the battery chamber
of Housing (B) [38], gently remove Housing (B) [38].
Then the inside parts can be removed in an assembled or single state. All the parts can be easily removed by
raising the Clutch Dial [4]. Parts are separated into the drive unit (an assembly of the armature and the gear
unit), power supply unit, Pushing Button [42] and Strap [45].
Socket wrench
Fig. 1
vise
19-mm socket
Cloth
Hexagonal portion