--- 10 ---
(h) Remove the Switch [46] by slightly pushing the two protrusions of the Controller Circuit Holder [34].
Be careful not to apply excessive force to the protrusions to prevent damages to the protrusions.
( i ) Loosen the two Tapping Screws (W/Flange) D4 x 20 [37] and remove the Controller Circuit Holder [34] from
the Housing Ass'y [32].
(5) Disassembly of the armature and the stator
(a) Remove the four Tapping Screws D5 x 40 [1] from the Gear Cover [2] and insert a screwdriver between the
Inner Cover [8] and the Housing Ass'y [32]. Pry the assembly of the Gear Cover [2], Inner Cover [8] and
Armature [10] off with the screwdriver. At this time, be sure to remove the Carbon Brushes [29].
(b) Remove the Fan Guide [11]. Remove the two Hex. Hd. Tapping Screws D4 x 70 [12] from the Stator Ass'y
[13] and tap the end surface of the Housing Ass'y [32] slightly with a wooden hammer. Then, the Stator Ass'y
[13] can be removed. Before removing the Stator Ass'y [13], disconnect the internal wires and remove the
Brush Holders [28] from the Housing Ass'y [32].
8.2 Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse. However, special
attention should be given to the following items.
8.2.1 Reassembly of the spindle section
(1) First, mount the Chuck Cover [21], Felt Packing (A) [23], Felt Packing [24] and the Drill Chuck 10TLRD [25]
and then tighten the Spindle [19] and the Drill Chuck 10TLRD [25] at the proper tightening torque using the
J-309 tool. Next, tighten the Flat Hd. Screw (Left Hand) M5 x 15 [27] (See Fig. 8).
(2) Secure the Ball Bearing [18] to the Gear Cover [2] with the Flat Fillister Hd. Screw M4 x 10 [17]. Hold the
head of the Gear Cover [2] and press down on the end surface of the Drill Chuck 10TLRD [25] with a hand
press to press-fit the spindle section into the above assembly.
Fig. 8
End surface of drill chuck
Flat. Hd. Screw (Left Hand) M5 x 15 [27]
Gear [20]
Felt Packing (A) [23]
Chuck Cover [21]
Felt Packing [24]
Drill Chuck 10TLRD [25]
J-309
Secure with a vise.
Spindle [19]
