13/ 20
Fig. 52
Fig. 53
3-14. Removing/Disassembling/Assembling Engine Block (cont.)
1) Separate Crank case from Cylinder by removing four M5x20
Hex socket head bolts.
If cannot be separated because of the adhesive, remove by hitting
the both ends of Crankshaft alternately with plastic or wooden
hammer. Be careful not to let Crankshaft tilt too much at this time.
Cylinder can be damaged. (Fig. 51)
Now you can replace Oil seals on the ends of Crankshaft and two
Piston rings on Piston.
2) Remove Ball bearing 6001 using Bearing Extractor (No. 1R269). (Fig. 52)
Note: When press-fitting Ball bearing 6001, insert Drill Chuck Remover 11 (No. 1R048) between Crankshaft (R)
and (L) in order not to deform the bearing. (Fig. 53)
3) Pull off Piston clip from Piston pin while turning in the loosening
direction using pliers. (Fig. 54)
DISASSEMBLING
Fig. 51
Crankshaft
Bearing Extractor (No. 1R269)
Drill Chuck Remover 11
(No. 1R048)
Ball bearing 6001
1R028
1R048
1R034
Fig. 53
4) Push Piston pin out of Piston by pushing from the opposite side
using T-type Hex Wrench 4-130 (No. 1R171) or the like. (Fig. 55)
5) Now Needle gauge 8 can be extracted from Connecting rod for
replacement. When replacing Piston, replace two Piston clip at a time.
Fig. 55
Piston clip
Piston clip
1R171
Piston pin
