SMC Networks ATV50 - Cylinder Head;Valves - Precautions in Operation; Cylinder Head;Valves Troubleshooting; Low Compression;High Compression; Excessive Smoke

6-
0
G
e
●
C
P
pi
s
P
pi
s
T
o
C
y
Ex
Sp
6-
0
Lo
w



Hi
g

Ex
c


Ex
c



Ov
e




0
2. Prec
a
e
neral I
n
This chap
t
piston/pis
C
ylinde
r
P
iston &
s
ton
r
ing
C
P
iston &
s
ton ping
Clearanc
e
o
rque V
a
y
linder head
haust pipe
s
ark plug
0
3. Troub
w
Compr
e
Cylinder
Cylinder
Cylinder
o
g
h compr
e
Excessiv
e
c
essive n
o
Piston a
n
Excessiv
e
c
ess smo
k
Cylinder
o
Imprope
r
Piston or
e
rheating
Excessiv
e
Engine c
o
Oil suppl
y
Wrong ig
a
utions i
n
formati
o
t
er is cont
a
ton ring/pi
s
C
C
learance
b
and
Clearanc
e
pi
Clearanc
e
e
between
p
a
lue
Nut
s
tud bolt
leshoot
i
e
ssion
head gas
k
head war
p
o
r piston r
i
e
ssion
e
carbon
b
o
ise
n
d cylinder
e
carbon
b
k
e
o
r piston r
i
r
installatio
cylinder
w
e
carbon
b
o
oling sys
t
y
is out of
nition timi
n
SM
C
n Opera
o
n
a
ined main
s
ton pin a
n
Item
ID of Cylin
d
Cylind
e
Circular
d
C
ylinder hea
d
b
etween pis
t
ring groove
e
of the mo
u
ston ring
OD of
p
e
between
p
OD of pis
p
iston pin h
o
i
ng
k
et leaking
p
ed or cra
c
i
ngs worn
b
uild-up o
n
worn out
b
uild up
i
ngs worn
n of pisto
n
w
all scored
b
uild-up o
n
t
em (fan,
c
order.
n
g
C
AT
V
5
0
tion
tenance a
n
n
d clip.
d
er bore
e
ricity
d
egree
d
Warpage
t
on ring
fi
r
u
th of
f
p
iston
p
iston and c
y
ton pin
le and pisto
or damag
e
c
ked
out
n
piston he
a
out
n
rings
or scratc
h
n
the pisto
n
c
ylinder air
0
/10
0
S
n
d service
r
st ring
second
ring
first ring
second
ring
c
ylinde
r
o
n pin
1.4kgf-m
/
0.9kgf-m
/
2.0kgf-m
/
e
d
ad or in c
o
h
ed
n
or comb
u
shroud…
S
ervice
M
for cylind
e
Standar
d
40.0
0
0.0
3
0.0
3
0.1
0.1
39.9
5
0.0
3
9.99
6
0.0
0
/
14Nm
/
9Nm
/
20Nm
o
mbustion
u
stion cha
m
etc.) work
s
M
anua
l
Chapt
e
r head, C
y
d
value (m
0
0-40.015
----
----
----
3
－0.05
3
－0.05
5-0.35
5-0.35
5
8-39.972
3
4-0.047
6
-10.000
0
8-0.015
chambe
r
m
be
r
s
badly.
er 6 Cylin
d
y
linde
r
, an
d
m)
U
s
valu
4
0
0
0
0
-
5
d
er Head/
V
d
reed valv
e
s
age
e (mm)
0.10
0
.05
0
.03
0
.03
0.1
0.1
0.6
0.6
---
0
.10
----
----
5
1 -
V
alves
e