Makita EK7650H Technical Information page 16

R
epair
[4] DISASSEMBLY/ASSEMBLY
[4]-8. Engine (cont.)
DISASSEMBLING
Important: When Intake/ Exhaust valves have to be replaced, remove Cylinder head complete.
(Refer to previous page.)
(5) Loosen eleven Hexalobular socket head bolts on the bottom of Crank case (Fig. 58), then remove Crank case from
Cylinder block. As Liquid gasket makes Cylinder block stick on Crank case, insert and twist a slotted screwdriver
between the clearance. (Fig. 59)
Scrape away Liquid gasket on the mating surface.
(6) Pull out the assembled part of Crank shaft and Piston from Cylinder block. (Fig. 60)
(7) Remove one of Ring spring 12 with a thin slotted screwdriver, then push Piston pin from the opposite with care
so as not to damage the other Ring spring 12. (Fig. 61)
The following parts mentioned in Fig. 62 can be replaced individually. When the rest parts have to be replaced,
Crankshaft complete is required.
Fig. 58
M5x16
Hexalobular
socket head
bolt (3 pcs.)
Crank case viewed
from the bottom
side
Fig. 60
Fig. 61
Piston pin
Insert a thin slotted screwdriver
from the depression on the rib
around Piston pin hole.
M6x30 Hexalobular
socket head bolt (8 pcs.)
Cylinder block
Ring spring 12
Piston
Fig. 59
Crank case viewed from the bottom side
Slotted
screwdriver
Fig. 62
Top ring
Second ring
Oil ring
Piston
Piston pin
Ring spring 12
Woodruff key 4
Oil seal 17
P 16/ 19
Slotted
screwdriver
Cylinder block
Ring spring 12
Oil seal L
Flat washer 41
Crankshaft
complete*
*The components cannot be
supplied individually.