Hitachi G 18SR, Technical Data And Service Manual

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(2) Removal of the Dust Seal [37] <45>
1. Insert the hooks of the J-204 bearing puller between the commutator and the Dust Seal [37] <45> from both
sides, and fix the hooks with the wing bolts.
2. Place the J-204 bearing puller on a supporting jig and push down on the armature shaft with a hand press to
remove the Dust Seal [37] <45> together with the Ball Bearing 6000VVCMPS2L [38] <46> . Replace the Dust
Seal [37] <45> with new one because it is damaged by the removal of the Ball Bearing 6000VVCMPS2L [38]
<46> .
(3) Removal of the Stator Ass'y [16] <16>
1. After removing the Armature [13] <13> , disconnect the internal wires connected to the Brush Holders [47]
<55> and the Switch [50] <59> .
2. Loosen the two Hex. Hd. Tapping Screws D5 x 60 [15] <15> and remove the Stator Ass'y [16] <16> from the
Housing [40] <48> . If the Stator Ass'y [16] <16> cannot be easily removed from the Housing [40] <48> ,
disassembly can be facilitated by heating the Housing [40] <48> to a temperature of approximately 60 û C
(140 û F) with an appropriate heating device.
(4) Removal of the Gear [20] <20>
1. Loosen the four Hex. Socket Hd. Bolts (W/Flange) M5 x 16 [28] <28> , and remove the Packing Gland [27]
<27> together with the Spindle [25] <25> and the Gear [20] <20> from the Gear Cover Ass'y [5] <5> in a
single body.
2. Remove the Retaining Ring for D12 Shaft [19] <19> from the Spindle [25] <25> .
3. When it is necessary to remove the Gear [20] <20> from the Spindle [25] <25> , it is highly recommended that
the special repair tools described below are utilized.
Fig. 9
Sleeve
Packing gland
Spindle
Push
Gear
Place the assembly on a sleeve that
matches the dimension of the Packing
Gland [27] <27> and push down on the top
of the Spindle [25] <25> with a hand press
to remove the Gear [20] <20> as shown in
Fig. 9.