Makita AN250HC Technical Information page 5

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epair
[4] DISASSEMBLY/ASSEMBLY
[4]-2. Driver, Cylinder section (Cylinder stay, Valve seat)
DISASSEMBLING
(1) Driver and Cylinder section can be removed as illustrated in Fig. 6.
Fig. 6
Disassemble Top cap section and Top cap gasket as
illustrated in Fig. 3.
O-ring 6 is prone to be lost. Therefore, remove O-ring 6
before the next step.
Top cap gasket
(2) Remove Cylinder stay and Valve seat from Cylinder as illustrated in Fig. 7.
Fig.7
Remove Cylinder stay with slotted screwdriver,
inserted into the gap between Cylinder stay and Cylinder.
Valve seat
Cylinder stay
Cylinder
(3) O rings of Cylinder section can be replaced as illustrated in Fig. 8.
Fig. 8
O-ring 26
Driver
ASSEMBLING
Take the disassembling step in reverse. Refer to Figs. 8, 7 and 6.
O-ring 6
slotted screwdriver
Cylinder stay
O ring 67
Head valve guide
Strike Housing set with plastic hammer.
Cylinder section can be removed.
Head valve guide
Valve seat
Cylinder stay
Cylinder
Disassemble Valve seat from Cylinder stay
with slotted screwdriver.
Valve seat
P 5/14
Driver
O-ring 26
O ring 67
O ring 53
O-ring 39
slotted screwdriver
Cylinder
O-ring 39
O ring 53