Hitachi GP 2S2 Techical Data And Service Manual page 11

4. Disassembly of the Stator (A)
(1) Remove the Armature Ass'y [17], and then pull out both Brush Holder [30] from the Housing [26].
(2) Disconnect the internal wires of the Stator (A) [20] from the Brush Holder [30].
(3) Loosen the set screw on the Slide Switch [35] and disconnect the two internal wires protruding from
the Stator (A) [20].
(4) Remove the Fan Guide [18] from the Housing [26].
(5) Loosen the two Hex. Hd. Tapping Screw D4 x 70 [19] and remove the Stator (A) [20] from the
Housing [26]. If the Stator (A) [20] cannot be easily removed, heat the Housing [26] to about 60°C.
The Stator (A) [20] can then be easily removed.
5. Disassembly of the Slide Knob
(1) Loosen the Tapping Screw (W/Flange) D4 x 16 [41] to pull out the Tail Cover [40].
(2) Hold the Housing [26] and raise the Slide Bar [32] until the Slide Knob [24] moves to the "ON"
position.
(3) Confirm that the Slide Knob [24] has not moved to the "ON-LOCK" position, and then push down on
the Slide Knob [24] until it clicks, while keeping the Slide Bar [32] raised.
(4) Raise the Slide Knob [24] straight up and remove it, while keeping the Slide Bar [32] raised.
6. Disassembly of the Spindle
Loosen the Hex. Socket Set Screw M4 x 4 [16], and remove Bearing Lid (B) [2].
The Spindle [3] can then be taken out.
Reassemble the parts by reversing the disassembly procedure, and note the precautions given below.
(1) To replace the Armature Ass'y [17] and Ball
Bearing 608VVC2PS2L
commutator side, press in the Dust Seal [21]
while carefully noting its direction until the end
face of the Dust Seal [21] strikes the butting
surface of the Armature Ass'y [17]. Make sure
that the Dust Seal [21] cannot turn freely.
(See Fig. 3.)
The Dust Seal [21] is an important component
for improved dust protection of the Ball
Bearing 608VVC2PS2L [22]. Be sure to use a
new one every time you disassemble the Ball
Bearing 608VVC2PS2L [22].
Reassembly
[22] on the
Fig. 3
-8-
Armature shaft
Ball Bearing 608VVC2PS2L [22]
Dust Seal [21]