Repair Guide; Precautions On Disassembly And Reassembly - Hitachi CH 36DL Service Manual

1. Precautions on disassembly and reassembly

[Bold] numbers in the descriptions below correspond to item numbers in the Parts List and the exploded
assembly diagram for the Model CH 36DL.
Before conducting any repair, make sure to remove the battery (Type BSL 3620, BSL 3626 or BL 36200)
from the product. Otherwise, the motor will suddenly start to run. This is very dangerous.
1. Removing the bottom cover ass'y
(1) Remove the Bottom Cover Ass'y [38] by removing four Tapping Screws (W/Flange) D5 x 20 (Black)
[40] that secure the Bottom Cover Ass'y [38] to the main unit.
(2) Slide the Cam Rod Holder [39] in the direction of the blade. Then remove the Washer [33] (bottom
cover), Cam Rod [34] (bottom cover), Gear [35], First Gear [37], Cam Rod [34] (housing), and Washer
[33] (housing). Lastly, remove the Cam Rod Holder [39].
2. Removing the blade ass'y
Be sure to attach the Blade Case [48] before removing the Blade Ass'y [47].
(1) Raise the Blade Ass'y [47] imbedded into the housing toward the bottom cover. Then remove the
Cushion [29], Spacer [30], and Blade Ass'y [47]. If the Blade Ass'y [47] is too tightly imbedded and
cannot be removed, loosen the Tapping Screw (W/Flange) D4 x 20 (Black) [26] securing the housing in
place near the Blade Ass'y [47], and then remove the Blade Ass'y [47].
3. Removing the blade and the spacer
Remove two Hex. Socket Hd. Bolts (W/Button) M6 x 25 [31] and two Nylon Nuts M6 [28]. Then remove
the Spacer [30]. Two Hex. Socket Hd. Bolts (W/Button) M6 x 25 [31] on the edge of the blade can be
loosened by inserting a hexagonal wrench through the holes at the top and bottom of the blade.
4. Removing the sub handle ass'y
Remove two Machine Screws (W/Washers) M5 x 30 [10]. Then pull the Sub Handle Ass'y [1] outward to
disengage it from Housing (A).(B) Set [23].
5. Removing housing (B)
(1) Remove twelve Tapping Screws (W/Flange) D4 x 20 (Black) [26] so that housing (B) can be removed with
all internal parts stored in housing (A).
(2) Grip the Motor DC 36 V [16] and lift housing (A) so that the power supply section (Motor DC 36 V [16],
Switch [8], Controller (W/Ferrite Core) [19], and Battery Terminal [22]) can be removed in its entirety.
(3) Remove the Rubber Cushion [25], Trigger [21], and Push Pin [13] while making sure that Spring (B) [20] on
Trigger [21] and Spring (D) [9] on Push Pin [13] are not mislaid.
6. Disassembling the power supply section
(1) When disconnecting the internal wire (black) for the Motor DC 36V [16] from the Switch [8], remove
the solder with a soldering iron. When disconnecting the internal wire (red) from the Connector 50092
[5], cut the Connector 50092 [5] connection with nippers.
(2) The Controller (W/Ferrite Core) [19] is soldered to the Battery Terminal [22] and two Switches [8] with
internal wires.

REPAIR GUIDE

Disassembly
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