HITACHI DH 24PE User guide

MODEL DH 24PE

1. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY

[Bold]

The
assembly diagram.

1-1. Disassembly

(1) Disassembly of the Striking Mechanism Section

numbers in the descriptions below correspond to the item numbers in the Parts List and exploded

With a drill bit or screwdriver bit, push in the Second Hammer

*

O-Ring RPM810
Set the Change Lever

*

[7]

, insert a small slotted-head screwdriver into the concave position located on the rear end of the Change

Lever

*

*

*

[13]

, and pull it off. (It is very important to ensure that the Change Lever
between the "Drill"and "Hammer"marks when it is disassembled or assembled.)
Loosen the four Tapping Screws D5 x 35
the Housing

[47]

to be pulled out at the same time, c aus ing dam age to the Carbon Brushes
Remove Spring (B)
Piston

[40]

mounted on it can be removed from the Inner Cover
With a bearing puller (the Special Repair Tool J-30 Bearing Puller Ass'y, Code No. 970804, is
recommended), remove the First Gear
Bearing
the 9 mm diameter end of the Second Shaft

[30]

can then be disconnected fr om the Piston Pin

[40]

[27]

.

[13]

to a position halfway between the "Drill" and"Hammer"marks on the Gear Cover

[8]

, and remove the Gear Cover

[54]

are loosely fitted together. Attempting to pull them out first could cause the Arm ature Ass ' y

[34]

from the end of the Second Shaft

moves to its max imum upper pos ition (inner c over side) . The arm of the Rec iprocating Bearing

[31]

, and t he Second Shaft

[33]

as a unit.

[41]

from the Second Shaft

. At this time, carefully note that the First Gear

[35]

.

[25]

to release the Striker

[13]

is positioned halfway

[7]

. The Inner Cover

[64]

.

[35]

, and turn the Second Shaft

[35]

and the components

[35]

. Then take off the Reciprocating

[41]

must be aligned with and pre ss-fitted onto

[28]

[35]

so that the

from the

[33]

and

Move the Clutch

*

The Clutch Spring

(2) Disassembly of the Chuck Section

As shown in Fig. 10, slide the Grip
indicated by the arrow mark, and rem ove the Front Cap

The Grip

Spring
removed from the Cylinder

[2]

[4]

, Washer (B)

[38]

to the pinion side of the Second Shaft

[37]

and Washer (B)

, Ball Holder

[5]

[36]

[2]

[3]

inside the Grip

and S teel B all

[20]

.

can then be removed from the Second Shaft

in the direction

[18]

can then be

[2]

, Holder

[1]

[35]

, and pull off the O-Ring S-8

.

Fig. 10

[39]

[35]

.

Front Cap

Grip

.

[1]

[2]

−1−

(3) Disassembly of the Cy linder , Second Gear (Slip Mechanis m S ec tion) and related parts

φ

Take the Inner Cover

*

Retaining Ring for D20 Shaft
Snap Ring Pliers [Code No. 970976] is recom m ended.) Then, turn the Gear Cover
press to extrac t the Cylinder
Cylinder
Remove the Retaining Ring for D30 Shaft

[21]

O-Ring
Cylinder
970977] onto the outer circumfer ence of the O-Ring
employed to prevent idle striking, please advise customers to replace it with a new one whenever it is
disassembled.
Extract the Retaining Ring for D37 Hole
a hand press to extract the Ball Bearing
the hand press to extract the Oil Seal
with a new one whenever it is disas s em bled.

[20]

. At this time, be very careful not to los e the three Steel Balls

, Spring (A)

[27]

from the inner part of the Cylinder

[20]

. (For easy extraction of this O-Ring

[33]

off from the Gear Cover

[22]

, and Washer (A)

[6]

. (For easy removal of this retaining ring, use of Special Repair Tool J-200

[20]

from the Gear Cover

[24]

[23]

can then be removed from the Cylinder

[17]

, turn the Gear Cover

[16]

from the Gear Cover

[14]

from the Gear Cover

[7]

, and remove the entire chuck section. Extract the

[7]

upright and use a hand

[7]

. The Sleeve

from the upper part of the Cylinder

[20]

, and the Sec ond Ham mer

[27]

, fit a S pecial Repair Tool J-201 Spring Hook [Code No.

[27]

, and pull it out. see Fig. 13) As the O-Ring

[7]

[7]

[15]

can then be extracted from the

[19]

.

[20]

. The Second Gear

[20]

. Then, extract the

[25]

can be extracted from the

so that its tip portion is upward, and use

[7]

. Next, turn the Gear Cover

. Ensure that t he Oil Seal

[14]

[27]

[7]

and use

is replaced

is

* Use of Special Repair Tools
* Snap Ring Pliers [J - 200]: (See Fig. 11)

Used to remove the Retaining Ring for D20 Shaft

[7]

Cover

* Spring Hook [J-201]: (See Fig. 12)

Used to extract the O-Ring

grip the Striker

[27]

1.2

.

[27]

inserted at the inner part of the Cylinder

[28]

to prevent idle striking. As shown in Fig. 13, fit the Spring Hook [J-201] onto the O-Ring

from its outer circ um fer enc e, and pull it out.

140

45

(1) Snap Ring Pliers (J-200)

[6]

which fixes the Cylinder

217

(2) Spring Hook

Code No. 970977

[20]

at the tip end of the Gear

[20]

which is designed to catch and

Fig. 12

Code No. 970976

Fig. 11

J-201 Spring Hook

O-Ring

Cylinder

−2−

[20]

[27]

Fig. 13