Reassembly - Hitachi PDA-100G Technical Data And Service Manual

5) Remove the Fan Guide [10] <9> from the Housing Ass'y [37] <36>.
6) Loosen the Tapping Screw D4 x 70 [11] or the Hex. Hd. Tapping Screw D4x70 <10> securing Stator (A)
[12] <11>. Remove Stator (A) [12] <11> from the Housing Ass'y [37] <36>.
(4) Disassembly of the gear
1) Loosen the four Seal Lock Screws (W/SP. Washer) M4 x 12 [25] <24> that secure the Packing Gland [24]
<23> to the Gear Cover Ass'y [4] <3> and remove the Packing Gland [24] <23> from the Gear Cover Ass'y
[4] <3>.
2) Remove the Retaining Ring for D11 Shaft [16] <15> that secures the Gear [19] <18> to the Spindle [27]
<26>.
3) Remove the Wave Washer [17] <16> and the Gear [19] <18> from the Spindle [27] <26>.

8-2. Reassembly

Push the parts together in the reverse order of disassembly, with the precautions given below.
(1) Ensure that the terminals of the stator are not bent or otherwise damaged.
(2) Generously lubricate the teeth of Gear [19] <18> and Pinion [6] <5> with grease. Rub grease onto the teeth
with your fingers so that the grease reaches each tooth bottom. Note that the Gear [19] <18> and the Pinion
[6] <5> may wear faster than normal if under-lubricated.
(3) Be sure to soak the inner diameter of the Felt Packing [23] <22> with machine oil. Otherwise, its dust-sealing
function will fail to work properly, resulting in earlier damage of the Ball Bearing 6201VVCMPS2L [22] <21>.
(4) When replacing the Armature [9] <8> and the Ball Bearing 626VVC2PS2L [14] <13> on the commutator side,
press inward on the Dust Seal [13] <12> while taking care of its direction until the end face of the Dust Seal
[13] <12> contacts against the end surface of the Armature [9] <8> and make sure that Dust Seal [13] <12>
cannot be turned freely by hand. Keep the end face of the armature shaft approximately 0.2 mm (reference)
distance inward of the end face of the Ball Bearing 626VVC2PS2L [14] <13>. (See Fig. 3.)
The Dust Seal [13] <12> is an important element for improved dust protection of the Ball Bearing
626VVC2PS2L [14] <13>. Be sure to replace with a new one each time.
(5) When connecting the Earth Terminal [45] <44> to the internal wire (the middle wire among three) of the Noise
Suppressor [49] <48>, strip the insulation sheath on the internal wire by about 6 mm and press-connect it
together with the Earth Terminal [45] <44> with a clamping tool available on the market.
About 0.2 mm (reference)
Armature shaft
Ball Bearing 626VVC2PS2L [14] <13>
Dust Seal [13] <12>
Fig. 3
Solderless connection
Fig. 4
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