Hitachi C 9BA2, Technical And Service Manual

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8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The disassembly and reassembly procedures for the Models C 9SA2 and C 9BA2 are essentially the same. The
[Bold] numbers in the descriptions below correspond to the item numbers in the parts list and exploded assembly
diagram for the Model C 9SA2. During disassembly and reassembly, and at all other times as well, sufficient care
must be exercised in handling to ensure that there is no deviation in the flatness of the bottom surface of the base
and in its perpendicularity with relation to the saw blade.
8-1. Disassembly
(1) Prior to attempting further disassembly, ensure without fail that the TCT Saw Blade 235MM [12] is removed to
prevent damage to its cutting edge, and to avoid possible serious accident.
(2) Removal of the Safety Cover [7]
First, disconnect the Return Spring [8] from the Safety Cover [7] . Then, loosen the two Seal Lock Flat Hd.
Screws M5 x 14 [10] and take off the Bearing Cover [9] . The Safety Cover [7] can then be removed.
Fig. 1
(5) Removal of the Armature [24]
First, remove the Brush Caps [58] and take out the Carbon Brushes (1 Pair) [57] . Then, loosen the Machine
Screws (W/Washers) M5 x 40 (Black) [59] and separate the Housing Ass'y [62] from the Gear Cover [27] .
If the Armature [24] is remained in the Housing Ass'y [62] , gently tap the Housing Ass'y [62] on the edge of the
surface where the Gear Cover [27] is mounted with a wooden or plastic hammer and remove the Armature
[24] . At this time, be very careful not to hit the fan on the Armature [24] . If the Bearing Bushing [31] is
remained in the Housing Ass'y [62] , remove it in the same manner as the case of the Armature [24] . If the
Rubber Bushing [30] is remained in the Housing Ass'y [62] , remove it with tweezers being very careful not to
scratch it.
(6) Removal of the Base Ass'y [45]
Extract the Roll Pin D8 x 50 [26] and disassemble the Base Ass'y [45] from the Gear Cover [27] .
(3) Removal of the Bearing Holder [3] together with the Spindle and
Gear Set [2]
After removing the Safety Cover [7] as described above, loosen the
two Seal Lock Flat Hd. Screws M6 x 14 [4] .
(4) Separation of the Spindle and Gear Set [2] from the Bearing Holder [3]
As illustrated in Fig. 1, support the Bearing Holder [3] with an
appropriate tubular jig, and push down on the end of the spindle to
separate the Spindle and Gear Set [2] from the Bearing Holder [3] .
Jig
Push
56 mm
(2-13/64")
60 mm
(2-23/64")