Repair Guide; Precautions In Disassembly And Reassembly - Hitachi C 6DD Technical Data And Service Manual

9. REPAIR GUIDE

[WARNING]
Without fail, remove the storage battery from the main body of the tool before starting repair or
maintenance work. If the battery is left in and the switch is activated inadvertently, the motor will start
rotating unexpectedly, which could cause serious injury.

9-1. Precautions in Disassembly and Reassembly

Please follow the precautions below for disassembly and reassembly procedures.
The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and the exploded
assembly diagram.
Carefully handle the Base Ass'y [69] to avoid causing any inaccuracy in flatness of the bottom and other parts
during disassembly, reassembly and other handling processes.
9-1-1. Disassembly
Before disassembly, be sure to remove the saw blade to prevent injuries, or damage to the saw blade
itself.
(1) Prior to attempting further disassembly, ensure without fail that the TCT Saw Blade [16] is removed to prevent
damage to its cutting edge, and to avoid possible serious accident.
(2) Removal of the Safety Cover [11]
First, disconnect the Return Spring [12] from the Safety Cover [11]. Then, loosen the two Seal Lock Flat Hd.
Screws M4 x 10 [14] and take off the Bearing Cover [13]. The Safety Cover [11] can then be removed.
(3) Removal of the Bearing Holder [8] together with the Spindle and Gear Set [7]
After removing the Safety Cover [11] as described above, loosen the two Seal Lock Flat Hd. Screws M5 x 14
[25], and take off the Bearing Holder [8] together with the Spindle and Gear Set [7].
(4) Separation of the Spindle and Gear Set [7] from the Bearing Holder [8]
As illustrated in Fig. 1, support the Bearing Holder [8] with an appropriate tubular jig, and push down on the
end of the spindle with a hand press to separate the Spindle and Gear Set [7] from the Bearing Holder [8].
Push
Jig
49 mm
(1-15/16")
Fig. 1
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