Hitachi DH 36DL, Technical Data And Service Manual, Page: 22 / 54

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Removal of the cylinder and the second hammer
Replacement of the carbon brushes
6. Removal of the armature and the housing
After disassembly of the hammering mechanism section, remove the Machine Screw M4 x 8 [87] from the
Grip Cover [86] and remove the Grip Cover [86] to show the carbon brushes. Hook the Spring [65] on the
edge of the carbon brush tube. Remove the Tapping Screw (W/Flange) D4 x 16 (Black) [58] from the Inner
Cover Ass'y [43] . Then the Inner Cover Ass'y [43] can be removed together with the Armature and Pinion
Ass'y [61] . At this time, be careful not to damage the carbon brushes. The Inner Cover Ass'y [43] and the
Armature and Pinion Ass'y [61] can be removed just by pressing the Pinion [56] slightly with a press
because there is an interference of the O-ring (P-22) [59] . The housing is constructed of two parts. Remove
the Tapping Screw (W/Flange) D4 x 20 (Black) [69] to disassemble the housing.
7. Removal of the carbon brush holder
After disassembly of the housing, remove the Tapping Screw (W/Flange) D4 x 16 (Black) [58] to remove
the carbon brush holder.
8. Replacement of the carbon brushes
Remove the Grip Cover [86] to show the carbon brushes. Pinch the terminal of the Carbon Brush (Auto
Stop Type) (1 Pair) [67] with a pair of long-nose pliers and pull it out of the carbon brush holder. At this time,
melt solder at the terminal. Hook the Spring [65] on the Carbon Brush (Auto Stop Type) (1 Pair) [67] with a
flat-blade screwdriver and remove the Carbon Brush (Auto Stop Type) (1 Pair) [67] .
O-ring (1AP-20) [31]
Hammer Holder [32]
O-ring (B) [33]
Second Hammer [30]
Damper (A) [34]
Tap with a hammer.
Stopper Ring [37]
O-ring (C) [35]
Damper Holder [36]
5-mm diameter hole (2 pcs.)
Punch (C) (J-341)
Stopper ring jig (A) (J-341)
Long-nose pliers
Carbon
Brush (Auto
Stop Type)
(1 Pair)
[67]
Flat-blade
screwdriver
Spring [65]
Terminal
Vise