Repair Guide; Precautions On Disassembly And Reassembly; Disassembly - Hitachi DH 18DPA Service Manual

WARNING: Be sure to remove the battery from the main body before starting repair or maintenance
work. If the switch is activated inadvertently with the battery still mounted on the main
body, the motor may turn unexpectedly and could cause serious injury.

1. Precautions on disassembly and reassembly

[Bold] numbers in the description below correspond to the item numbers in the parts list and exploded
assembly diagram for the Model DH 18DPA and {Bold} numbers to those for the Model DH 12DD.
1. Disassembly of the tool retainer ass'y
Fully pull the Grip [4]{4} in the arrow direction and remove the Front Cap [2]{2}. Remove the Stopper Ring
[3]{3} with a retaining ring puller while pulling the Grip [4]{4} in the arrow direction. Remove the Grip [4]{4},
Ball Holder [5]{5}, Steel Ball D7.0 [19]{19}, Holder Plate [6]{6}, and Holder Spring [7]{7} from the Cylinder
[20]{20}.
NOTE: Do not reuse the removed Stopper Ring [3]{3} as it is deformed at disassembly. Be sure to
use the new Stopper Ring [3]{3} at reassembly.
Fig. 1 • Disassembly of the tool retainer ass'y
[3]{3}

REPAIR GUIDE

Disassembly

[2]{2}
[4]{4}
[19]{19}
[4]{4}
[7]{7}
[6]{6}
-1-
[3]{3}
[20]{20}
[5]{5}