Hitachi G 12SA2, Технические данные и руководство по обслуживанию

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Fig. 11
(2) When replacing the Armature [14] <14> and the Ball
Bearing [19] <19> on the commutator side, press
inward on the Dust Seal [18] <18> while taking care of
its direction until the end face of the Dust Seal [18]
<18> hits against the butting surface of the Armature
[14] <14> and make sure that the Dust Seal [18] <18>
cannot turn freely. (See Fig. 9.)
The Dust Seal [18] <18> is an important element for
improved dust protection of the Ball Bearing [19] <19>.
Be sure to use a new one at every disassembly work of
the Ball Bearing [19] <19>.
Fig. 9
Dust Seal [18] <18>
(3) Apply Three Bond TB 1406 Screw Locking Agent to the following screws.
Three Seal Lock Screws (W/SP. Washer) M4 x 10 [20] <20> which fix Bearing Cover [13] <13> in place.
Three Seal Lock Screws (W/SP. Washer) M4 x 8 [23] <23> which fix Bearing Cover (B) [24] <24> in place.
Four Seal Lock Screws (W/SP. Washer) M5 x 16 [29] <29> which fix Packing Gland [28] <28> in place.
(4) When connecting the Earth Terminal [51] <50> to the internal wire (the middle wire among three) of the Noise
Suppressor [52] <51>, strip the insulation sheath on the internal wire by about 6 mm and press connect it
together with the Earth Terminal [51] <50> with a clamping tool available on the market.
Armature Shaft
Ball Bearing [19] <19>
Solderless connection
(5) Check that the spring end does not hold the pigtail when mounting the carbon brush. Do not catch the pigtail
in the tail cover when mounting the tail cover.
Pigtail
Fig. 10
Spring end
(6) When replacing the Gear Cover Ass'y [4] <4>, lubricate the needle bearing with mixed oil.
Mixed oil: Mixture of Hitachi power tool grease No. 2 (Unilube No. 00) and turbine oil
Mixture ratio ... 1:1 (weight ratio) Volume ... 0.5 cc