Makita EK7650H Technical Information page 7

R
epair
[4] DISASSEMBLY/ASSEMBLY
[4]-3. Clutch, Ratchet
DISASSEMBLING
(1) Remove Cutting device. Refer to the clause of [4]-1.
(2) Loosen three M5x12 Hexalobular socket head bolts, then remove
Clutch cover together with Starter assembly. (Fig. 16)
(3) Loosen three M5x16 Hexalobular socket head bolts with 1R290
and Cordless impact driver, and remove Ratchet complete. (Fig. 17)
(4) Remove M10-17 Hex lock nut by turning it counterclockwise by
using Cordless impact driver with Socket bit.
(5) Turn the hexagonal portion of Clutch holder clockwise by using
Cordless impact driver with Socket bit.
Clutch complete is removed.
Note: Clutch holder has a left hand thread.
(6) Remove Clutch drum assembly by hand. No tools are required.
Remove Retaining ring R-35 from Clutch drum with 1R005.
Press down Ball bearing 6003LLU in Clutch drum.
Fig. 17
Ratchet complete
M5x16 Hexalobular
socket head bolt (3 pcs.)
ASSEMBLING
(1) Put Spacer 17 and Clutch drum assembly to Crankshaft, then put
the other Spacer 17 on Clutch drum assembly. (Fig. 20)
(2) Remove Spark plug and assemble 1R372 carefully to Cylinder
block by hand to prevents Crankshaft from being rotated. (Fig. 21)
(3) Turn Flywheel slowly and carefully by hand until the top of
1R372 contacts Piston.
Note: Do not damage Piston.
(4) Turn the hexagonal portion of Clutch holder counterclockwise
with 1R223, 1R224 and 17mm flat width Socket in order to
tighten Clutch complete to the fastening torque 38N.m. (Fig. 20)
Note: • Do not use Cordless impact driver.
• Do not turn the hexagonal portion with 1R372 taken
apart from Piston.
(5) Assemble M10-17 Hex lock nut to Crankshaft by reversing
the disassembling procedure shown in Fig. 18.
(6) Set Ratchet complete and three M5x16 Hexalobular socket head
bolts in place by reversing the disassembling procedure shown in
Fig. 17.
(7) Assemble the rest in accordance with the clause of [4]-1.
Fig. 18
M10-17
Hex lock
nut
17mm flats width
Socket bit
Fig. 16
Clutch cover
Starter
assembly
M5x12 Hexalobular socket
head bolt (3 pcs.)
Fig. 19
Hexagonal
portion (M16-24)
of Clutch holder
Fig. 20
Crankshaft
Spacer 17
Clutch drum
assembly
Spacer 17
Clutch complete
24mm flats width Socket
(Square drive: 12.7mm)
1R224 1R223
Fig. 21
Cylinder block
1R372
Piston
P 7/ 19
U-shaped notch
of Reel
24mm flats width
Socket bit