Front Cover; Repaire Guide; Precautions In Disassembly And Reassembly - Hitachi CR 24DV Technical And Service Manual

7-3. Front Cover

[WARNING]
The Model CR 24DV is equipped with the front cover to protect the operator against possible electric
shock, and it is not intended for cutting live lines. The front cover covers both the gear cover and the
upper cover to protect the operator against electric shock in the event that a live line is accidentally cut
and electricity flows from the blade to the metallic enclosure. Customers must be instructed to hold the
handle (made of polycarbonate resin) with one hand and the other hand on the front cover to support the
main body during the cutting operation. Be sure to instruct the customers that the front cover must not
be removed when using the Model CR 24DV.

8. REPAIRE GUIDE

8-1. Precautions in Disassembly and Reassembly

Please follow the precautions below for disassembly and reassembly procedures. The circled numbers in the
following figures and the [Bold] numbers in the descriptions below correspond to the item numbers in the Parts
List. Prior to attempting disassembly or replacement of the saw blade, ensure that the battery is removed.
8-1-1. Disassembly
(1) Removal of the Upper Cover Ass'y [20]
Remove the Saber Saw Blade [501]. Remove the two Hex. Socket Hd. Bolts (W/Flange) M5 x 12 [30] and
pull out the Base [21]. Remove the two Machine Screws (W/SP. Washer) M4 x 12 [22] and the Cover Plate
[23], and pull out the Front Cover [24]. Remove the four Hex. Socket Hd. Bolts (W/SP. Washer) M5 x 16 [19]
from the Upper Cover Ass'y [20]. Pull the Upper Cover Ass'y [20] straight and remove it.
(2) Removal of the Plunger [14] from the Upper Cover Ass'y [20]
Remove the two Seal Lock Hex. Socket Flat Hd. Bolts M5 x 12 [33] from the Connector [38]. If the Seal Lock
Hex. Socket Flat Hd. Bolts M5 x 12 [33] are too tight, heat the Upper Cover Ass'y [20] to 100 --- 150˚C then
loosen the Seal Lock Hex. Socket Flat Hd. Bolts M5 x 12 [33]. Pull the Plunger [14] forward (toward the
blade) and remove from the Upper Cover Ass'y [20].
(3) Removal of the Gear Cover Ass'y [32] and the Housing [52]
Remove the Brush Cap [63] and the Carbon Brush [64]. Remove the Tapping Screw (W/SP. Washer) D5 x 30
[31]. Then the Gear Cover Ass'y [32] (together with the Armature Ass'y [46]), Housing [52] and Fan Guide
[48] can be removed.
(4) Removal of the Gear Cover Ass'y [32] from the Armature Ass'y [46]
Remove the three Machine Screws (W/SP. Washer) M4 x 12 [22]. Then the Gear Cover Ass'y [32] can be
removed from the Armature Ass'y [46].
(5) Disassembly of the Armature Ass'y [46]
Remove the Retaining Ring (E-type) for D10 Shaft [43] from the Armature Ass'y [46] with a flat-blade
screwdriver. Remove the Ball Bearing 6001VVCMPS2L [44] from the pinion side with the bearing puller ass'y
(J-30). Then Bearing Cover (A) [45] can be removed. Remove the Ball Bearing 608VVC2PS2L [47] from the
commutator side with the bearing puller ass'y (J-30).
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