Hitachi DH 15DV Manual

1. REPAIR GUIDE:
Without fail, remove the EB 12 Battery from the main body before starting maintenance work. Because
the tool is cordless, if the battery is left in and the switch is activated inadvertently, the motor will start
rotation unexpectedly, resulting in serious hazard:
1-1. Precaution and Suggestions for Disassembly and Reassembly of the Main Body:
The circled number in the descriptions below cor-
respond to the item numbers in the Parts List and
exploded assembly diagrams.
1-1-1. Disassembly
(1) Disassembly of the Chuck Section:
As shown in Fig. 1, slide the Grip
direction indicated by the arrow mark, and
remove the Front Cap
3
Holder inside the Grip, Holder Spring
and two Steel Balls
11
from the Cylinder
(2) Disassembly of the Housing:
After removing the chuck section, loosen and remove the nine D4 x 20 Tapping Screws (Black)
and the two D4 x 14 Tapping Screws
26
(A) (B) Set by removing Housing (B) from Housing (A).
(3) Disassembly of the Hammering Mechanism Section:
When the Cylinder
of the Reciprocation Bearing
21
from the Cylinder
through the hole in the tip end of the Cylinder
O-Ring (A) 18 . Pull out the First Gear
Then remove the Collar
the pinion side at the top of the Second Pinion
and Clutch Spring
Ring for D14 Shaft
extract the Change Lever
Ball 42 .
(4) Disassembly of the Cylinder and Second Gear (Slip Mechanism Section):
Extract the Retaining Ring
Extract the Retaining Ring for D20 Shaft
Cylinder 11 with a bearing puller. Be very careful not to lose the four D5.556 Steel Balls
Gear 12 , Spring (A)
18
tract O-Ring (D)
11
from the Cylinder
Spring Hook to pull it out from the outside.] To prevent idle hammering, be sure to replace
18
O-Ring (D) whenever the unit is disassembled.
(5) Disassembly of the Motor, Switch and Terminals:
After Housing (B) has been removed, the Motor Ass'y
52
can be taken out. To disassemble the removed Motor Ass'y
50 52
and , carefully read the following step.
MODEL
2
in the
1 2
. The Grip , Ball
9
can then be removed
.
27
which fix the main body. Then, separate the Housing
11 21
and the Piton are removed from Housing (A) in a single body, the arm
35
will be extracted from the Piston
11
, and with a screwdriver or slender rod push the Second Hammer
37
36 and the Reciprocating Bearing
32 can then be removed from the Second Pinion
44 which fixes the Change Lever
40 from Housing (A). Be very careful not to lose the D3.97 Steel
5 from the Cylinder
13 , and Washer (A)
from deep within the Cylinder
. [O-Ring (D) can be easily removed by using a Bozan Electric Tool H-75
DH 15DV
4
,
26
11
to disconnect the Striker
without the bearing from the Second pinion
35 . Next, remove the Clutch
31 , and remove the O-Ring
40 on the inner side of Housing (A), and
11 . Pull the Oil Seal
7 , and remove the 6904CM Ball Bearing
14 can then be removed from the Cylinder
11
, and remove the Second Hammer
25
, Switch
25
−#1 −
1
Housing (A),(B) Set
Fig. 1
21
. Then extract Piston
19
retained by
31
34 . The Clutch
31 . remove the Retaining
6 off of the Cylinder
8 from the
11 . Ex-
45 50
, and Terminals
45
, Switch , and Terminals
Front Cap
2
Grip
28
16
out
.
33 toward
33
11 .
10 .
16
and