Cylinder Head Assembly - Segway VILLIAN SSV Series Service Manual

CYLINDER HEAD, CYLINDER, PISTON CYLINDER HEAD, CYLINDER, PISTON
G G
F F
E E
D D
C C
A A
K K
J J
I I
Bolt tightening sequence
4 4
3 3

Cylinder head assembly

B B
H H
L L
M M
The valve spring is marked with a mark or the end with a
larger pitch is facing upwards.
2 2
6 6
5 5
1 1
WARNING
!
When disassembling and assembling the cylinder head
or operating the valve spring, you need to wear goggles.
◆ Install a new valve oil seal 【C】 on the valve guide,
and press the valve oil seal into place with a special
tool.
◆ Apply engine oil to the valve stem, and insert the
exhaust valve 【A】 and intake valve 【B】 into the
corresponding valve guides.
◆ Install the valve spring seat 【D】, valve spring
【E】, lock clip seat 【F】, and lock clip 【G】 in
sequence.
◆ Use special tools to compress the spring until there
is enough space to install the valve lock clip.
◆ Clamp a pair of valve lock clamps into the valve lock
clamp groove.
◆ Repeat the above steps to install the remaining
valves in place.
CAUTION CAUTION
!
◆ To install the valve lifter, refer to the chapters of
"Valve Clearance Adjustment" and "Selection of
Lifter".
◆ Align the positioning pins on the cylinder block and
place the cylinder head gasket 【I】. The gasket
should be clean and free of grease.
◆ Align the position of the positioning pin, and place
the cylinder head 【J】. Install new cylinder head
bolts 【L】 and tighten them in order.
◆ Install the bolts 【K】 and 【M】 at both ends and
tighten them according to the torque.
Cylinder head bolt 【L】
fi rst step: 12N·m(1.2 kgf·m, 8.8 ft·lb)
Second step：35N·m(3.57 kgf·m, 25.8 ft·lb)
Step 3: Rotate 180°
◆ Bolt 【K】 and 【M】 tightening torque:
Bolt【K】,【M】
9.8 N·m (1.0 kgf·m, 87 in·lb)
3-5-34