Makita HR4501C Technical Information page 14

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -6. Crank section, Cylinder, Piston (cont.)
DISASSEMBLY
3) Disassemble Cylinder 34 as illustrated in Fig. 40.
Fig. 40
Set Repairing jigs as follows.
1R213
1R040
3A) Cylinder 34 can be disassembled without 1R213. Refer to Fig. 40A.
Fig. 40A
Screwdriver
4) Disassemble Piston in the order of Figs. 41 to 43.
Fig. 41
Connecting rod
Crank shaft
Ring 38
Set Connecting rod to the
dead point on Cylinder
installation side by turning
Crank shaft.
1R350
1R040
1R350
Cylinder 34
Screwdriver
Fig. 42
Connecting rod
Ring 38
Disconnect Connecting rod
from Crank shaft.
Turn Handle clockwise. Cylinder 34 gripped with
1R213's claw is pulled out from Crank housing complete.
Ring 38 is left in Crank housing
complete after removal of Cylinder 34.
Cylinder 34 can be removed by levering
up with a pair of screwdriver.
Wooden piece to protect the edge of Crank housing
complete
Fig. 43
Connecting rod
Piston
Pull out Connecting rod from Crank shaft.
O ring 27
P 14/ 23
Ring 38 Crank shaft
Remove O ring 27
from Piston for
replacement.
Piston