Reassembly - Hitachi G 10SR3 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 the Gear [18] and the Pinion [5] with grease. Rub grease onto the teeth with
your fingers so that the grease reaches each tooth bottom. Note that the Gear [18] and the Pinion [5] may
wear at a faster rate if under-lubricated.
(2) Be sure to soak the inner diameter of the Felt Packing [22] with machine oil. Otherwise, its dust-sealing
function will fail to work properly, resulting in an earlier damage of the Ball Bearing 6201VVCMPS2L [21].
(3) When replacing the Armature [8] and the Ball Bearing 626VVC2PS2L [13] on the commutator side, press
inward on the Dust Seal [12] while taking care of its direction until the end face of the Dust Seal [12] hits
against the butting surface of the Armature [8] and make sure that the Dust Seal [12] cannot turn freely. Keep
the end face of the armature shaft approximately 0.2 mm (reference) distance inward of the end face of the
Ball Bearing 626VVC2PS2L [13]. (See Fig. 6.)
The Dust Seal [12] is an important element for improved dust protection of the Ball Bearing 626VVC2PS2L
[13]. Be sure to use a new one upon replacement.
Fit the Rubber Bushing [14] into the housing ball bearing chamber before installing the Armature [8].
(See Fig. 7.)
Dust Seal [12]
About 0.2 mm (reference)
Armature shaft
Ball Bearing
626VVC2PS2L [13]
Fig. 6
--- 9 ---
Housing ball bearing chamber
Rubber Bushing [14]
About 4.5 mm
Fig. 7