Hitachi DH 24PD2, Technical Data And Service Manual

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(2) Disassembly of the dust collection adapter ass'y

Disassembly of the Hose Ass'y 

[98]

 only

Loosen the knob that fixes the stopper, and push pipe (A) to its maximum stroke position.  This will cause the

Hose Ass'y 

[98]

 connection portion of pipe (A) to come out of the rear end of pipe (B).  In that state, pull on the

Hose Ass'y 

[98]

 to separate it from pipe (A).

Disassembly of the dust collection adapter ass'y (Refer to Fig. 13.)

Disassemble the Rubber Cap 

[94]

 and the Nozzle Seal

[93]

 from the nozzle portion, and remove the screw that

fastens nozzle (A) and nozzle (B).  While pressing the

claw head of nozzle (B) in the direction indicated by

arrow "A" in Fig. 13, insert the tip of a thin flat-blade

screwdriver between the surfaces in front of the claw-

connected portion and pry up gently to disengage the

claw so that nozzle (A) and nozzle (B) can be removed

from pipe (A).  Next, take the stopper off from pipe (A),

and remove the O-ring from the tail cap side so that the

tail cap can be removed from pipe (B).  Pipe (A) can then

be taken out from pipe (B) by enlarging its split section

after removing the retaining wing bolt.

(3) Disassembly of the striking mechanism section

Remove the Striker 

[35]

 chucked with O-ring (C) 

[32]

 by pushing in the Second Hammer 

[27]

 with a drill bit or

a screwdriver.  Turn the Change Lever 

[14]

 135

û

 clockwise from the "rotation only" (    mark) position pressing

the Pushing Button 

[12]

 deeply.  Pry the Change Lever 

[14]

 off in this position.  Remove the Tapping Screw

(W/Flange) D5 x 90 

[9]

 from the Gear Cover 

[10]

 and remove the Gear Cover 

[10]

.

The Inner Cover 

[39]

 and the Housing 

[72] 

are loosely fitted together.  Attempting to pull them out first could

cause the Armature 

[67]

 to be pulled out at the same time, causing damage to the Carbon Brushes 

[76]

.  For

directions on how to remove the Gear Cover

 [10]

, please refer to paragraph (1) "Disassembly of the dust

collection mechanism".

Remove the Spacer 

[42]

 and Spring (B) 

[43] 

from the end of the Second Shaft 

[44]

 and turn the Second Shaft

[44]

 so that the Piston 

[37]

 moves to its maximum upper position (inner cover side).  The arm of the

Reciprocating Bearing 

[48]

 can then be disconnected from the Piston Pin 

[40]

, and the Second Shaft 

[44]

 and

the components mounted on it can be removed from the Inner Cover 

[39]

 as a unit.

With a bearing puller, remove the First Gear 

[49] 

from the Second Shaft 

[44]

.  Then take off the Reciprocating

Bearing 

[48]

.  At this time, carefully note that the First Gear 

[49]

 must be aligned with and press-fitted onto the

9-mm diameter end of the Second Shaft 

[44]

.  The Clutch 

[47]

, Clutch Spring 

[46]

 and Washer (B) 

[45]

 can

then be removed from the Second Shaft 

[44]

.

Hose Ass'y 

[98]

Fig. 13

Retaining wing bolt

Pipe (A)

Nozzle (B)

Connection
surfaces

Nozzle (A)

Pipe (B)

A