-5-
2. Mounting the mechanical parts
(1) Mount Washer (S)
[16]
to the Spindle
[18]
. Put the twenty-eight Steel Balls D3.175
[13]
, Washer (J)
[14]
, and Hammer Spring
[15]
in the Hammer
[12]
, and mount it to the Spindle
[18]
.
(2) Align the highest point of the cam groove in the Spindle
[18]
with the steel ball insertion groove in the
Hammer
[12]
. Push down the tabs on the Hammer
[12]
with a hand press or similar tool to compress
the Hammer Spring
[15]
until it contacts the Spindle
[18]
and hold it there.
(3) Insert the two Steel Balls D5.556
[11]
into the steel ball insertion groove. Check that the two Steel Balls
D5.556
[11]
are in the groove, and then loosen the hand press.
(4) Set the hammer assembly onto the J-297 base for washer (S) (special-purpose tool, Code No.
317063), press the hand press down on the edge of the Spindle
[18]
to compress the Hammer Spring
[15]
, and then mount Stopper (A)
[17]
to the Spindle
[18]
. Loosen the hand press to complete the
procedure.
(5) Mount the Idle Gear Set (2 pcs.)
[19]
and two Needle Rollers (A)
[20]
to the Spindle
[18]
and insert
Washer (E)
[21]
to assemble the hammer assembly.
(6) Press-fit the Ball Bearing 6901VV
[22]
into the Inner Cover
[26]
and fit two Dampers (A)
[25]
into the
Inner Cover
[26]
. Then fit the O-ring
[24]
into Ring Gear (A)
[23]
, and fit the retaining rib of Ring Gear
(A)
[23]
into the concave portion of Damper (A)
[25]
.
(7) Check the hammer assembly (whether Washer (E)
[21]
is inserted into the Spindle
[18]
) for proper
engagement of the Idle Gear Set
[19]
with Ring Gear (A)
[23]
, and mount it to the Inner Cover
[26]
.
(8) Insert the Anvil
[10]
into the tip of the Spindle
[18]
of the hammer assembly, and then cover it with the
Hammer Case
[7]
.
NOTE: At that time, make sure that the ribs of the Inner Cover [26] are positioned at 90° relative
to the retaining tabs of the Hammer Case [7].
(9) Press-fit the Wiring Ass’y
[29]
all the way into the Inner Cover
[26]
. Make sure that the Wiring Ass’y
[29]
turns smoothly. If the Wiring Ass’y
[29]
does not turn smoothly, its gears could be improperly
engaged. In such a case, mount the Wiring Ass’y
[29]
properly.
90°
Retaining tabs of the Hammer Case
[7]
• Mounting the mechanical parts
Ribs of the Inner Cover
[26]
