8-2.Reassembly - Hitachi G 12SE2 Technical Data And Service Manual

8-2.Reassembly

Put the parts together in the reverse order of disassembly, with the precautions given below.
(1) Generously lubricate the teeth of Gear [20] and Pinion [6] with grease. Rub grease onto the teeth with your
fingers so that the grease reaches each tooth bottom. Note that under-lubricated Gear [20] and Pinion [6]
may wear at a faster rate.
(2) When replacing the Armature [12] and the Ball Bearing
608VVC2PS2L [18] on the commutator side, press inward
on Dust Seal (A) [17] while taking care of its direction until
the end face of Dust Seal (A) [17] hits against the butting
surface of the Armature [12] and make sure that Dust Seal
(A) [17] cannot turn freely. (See Fig. 7.)
Dust Seal (A) [17] is an important element for improved
dust protection of the Ball Bearing 608VVC2PS2L [18].
Be sure to use a new one at every disassembly work of the
Ball Bearing 608VVC2PS2L [18]. Do not forget to insert
the Thrust Washer [16] on the armature side of Dust Seal
(A) [17].
(3) Apply Three Bond TB 1406 Screw Locking Agent to the following screws.
Two Seal Lock Screws (W/Sp. Washer) M4 x 10 [1] which fix Bearing Cover [11] in place.
Three Seal Lock Screws (W/Sp. Washer) M4 x 8 [21] which fix Bearing Cover (B) [22] in place.
Four Seal Lock Screws (W/Sp. Washer) M5 x 16 [26] which fix Packing Gland [25] in place.
(4) 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.
(5) When replacing the Gear Cover Ass'y [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)
Pigtail
Spring end
Fig. 8
Volume ... 0.5 cc
--- 9 ---
Thrust Washer [16]
Armature Shaft
Ball Bearing
608VVC2PS2L [18]
Dust Seal [17]
Fig. 7