Repair Guide; Precautions In Disassembly And Reassembly - Hitachi C 7D Technical 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

The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and the exploded
assembly diagram for the Model C 7D.
9-1-1. Disassembly
Before disassembly, be sure to remove the TCT Saw Blade [17] to prevent damage to the teeth or personal
injury.
(1) Removal of the Safety Cover [12]
First, disconnect the Return Spring [13]. Then, loosen the two Seal Lock Flat Hd. Screws M4 x 10 [15], and
take off the Bearing Cover [14]. The Safety Cover [12] can then be removed.
(2) Removal of the Bearing Holder [9] together with the Spindle and Gear Set [8]
After removing the Safety Cover [12] as described above, loosen the two Seal Lock Flat Hd. Screws M5 x 14
[21], and take off the Bearing Holder [9] together with the Spindle and Gear Set [8].
(3) Separation of the Spindle and Gear Set [8] from the Bearing Holder [9]
As illustrated in Fig. 1, support the Bearing Holder [9] with an appropriate tubular jig, and push down on the
end of the Spindle and Gear Set [8] with a hand press to separate the Spindle and Gear Set [8] from the
Bearing Holder [9].
Push
Jig
49 mm
(1-15/16")
Fig. 1
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