--- 17 ---
Remove the hammer assembly from the J-297 base for washer (S) and support the end surface of the Spindle
[18]. With a hand press, push down either of the raised faces of the Hammer [11] to compress the Spring
[14]. In this position, extract the two Steel Balls D5.556 [10] from the cam grooves of the Spindle [18] and
the Hammer [11] with a small flat-blade screwdriver or a similar tool. Then, slowly release the hand press and
lift the Hammer [11] and Washer (S) [15] together to extract them from the Spindle [18]. The Spring [14] can
then be removed.
Steel ball
guide groove
Spindle [18]
Hammer [11]
Raised faces
of hammer
Top of spindle cam
Steel Ball D5.556 [10]
Fig. 5
9-1-2. Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse. However, special
attention should be given to the following items.
(1) Reassembly of Housing (A) assembly
(a) Be sure to follow the wiring diagram (Fig. 6) for proper wiring.
(b) Pay attention to the polarity of the Motor [27] when soldering the Internal Wire (Red) [28] and Internal Wire
(Black) [29] to the Motor [27]. The red-marked side of the Motor [27] is positive.
(c) Mount the Motor [27] into housing (A) so as to pay attention to the position of the Internal Wire (Red) [28]
and the depression for preventing motor body from rotating fit in housing (A).
(Note) Make sure that the Internal Wire (Red) [28] is passed under the motor so that it is not caught
between the motor and housing (A).
(d) Mount the DC-Speed Control Switch [34] to housing (A) so that the projection of the forwarding/reversing
lever at the top of the switch is inserted into the U-shaped groove of the Pushing Button [35]. Secure the
Fin [42] to the FET of the DC-Speed Control Switch [34] with the Machine Screw (W/Sp. Washer) D3 x 4
[41].
(Note) Make sure that the three internal wires from the FET are passed above the DC-Speed Control
Switch [34]. To avoid pinching, be careful not to place the internal wire of the battery terminal on
the terminal plate of the DC-Speed Control Switch [34].
