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9. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The circled numbers in the descriptions below correspond to the item numbers in the Parts List and exploded
assembly diagram.
9-1. Disassembly
NOTE: If it is difficult to loosen and remove the fixing bolts, use an appropriate heating device to heat
them to approximately 80
û
(176
û
F).
(1) Disassembly of the Armature Ass'y
[75]
A. Loosen the four Seal Lock Hex. Socket Hd. Bolts M4 x 8
[54]
, remove the Cap Covers
[55]
, Cap Rubbers
[56]
and Brush Caps
[57]
, and take out the Carbon Brushes (Auto Stop Type) (1 Pair)
[58]
. At this time, be very
careful not to lose the disassembled parts.
B. Loosen the four Nylock Hex. Socket Hd. Bolts M8 x 35
[26]
, and remove the Cylinder Case
[22]
. Next, after
loosening the Seal Lock Hex. Socket Hd. Bolt M8 x 16
[34]
, the Connecting Rod Ass'y
[31]
and the Crank
Washer
[33]
can be disassembled. Leave the Striker
[24]
and the Piston
[30]
as they are.
C. Remove the four Seal Lock Hex. Socket Hd. Bolts M5 x 16
[63]
and three Tapping Screws (W/Flange) D4 x 25
(Black)
[96]
. Remove Handle (A)
[85]
, Handle (B)
[87]
, four Nylock Bolts (W/Flange) M5 x 12
[105]
and Back
Cover
[82]
. Remove the six Seal Lock Hex. Socket Hd. Bolts M6 x 45
[60]
, Gear Cover
[38]
and Counter
Gear
[65]
. Insert a flat-blade screwdriver or a similar tool into the air vent of the Inner Cover
[42]
and raise the
Inner Cover
[42]
. Then the Inner Cover
[42]
, Armature Ass'y
[75]
and Crank Shaft
[47]
can be removed as a
single unit. At this time, be very careful not to damage the Fan
[74]
.
D. As illustrated in Fig. 4, support the Inner Cover
[42]
with an appropriate tubular jig, and push down on the end
surface of the armature shaft with a hand press to separate the Armature Ass'y
[75]
from the Inner Cover
[42]
.
Fig. 4
(2) Disassembly of the Crank Shaft
[47]
section:
First, remove the four Seal Lock Hex. Socket Hd. Bolts M5 x 16
[46]
which fix the Bearing Cover
[45]
.
Then, as illustrated in Fig. 5, support the lower surface of the Inner Cover
[42]
with an appropriate tubular jig,
align an appropriate steel rod with the end surface of the Crank Shaft
[47]
, and press down on the steel rod
with a hand press. The Ball Bearing 6205DDCMPS2L
[44]
, Distance Ring (B)
[41]
, Final Gear
[40]
, two
Woodruff Keys 4 x 16
[71]
, and Crank Shaft
[47]
can then be disassembled from the Inner Cover
[42]
.
Tubular jig
Crank Shaft
[47]
Inner cover
[42]
Armature Ass'y
[75]
Press the end surface of the
armature with a hand press.
