Yanmar YSE8 - Croas-Sectional Views of Piston Rings

Chec}
poinl
Rernedy
p$Ion pm
cylinder
gauge.
YSE8 YSEI2
42.
S
+0.l0
18d
+0.1
I
R€new ifwear
exceeds the ml\inum allowable
YSES
YSEI2
Piston
pin r04200
.23100
103438
-23100
using a
cylinder
8au8e.
Renew if wear
exceeds th€ maximurn allowable
YSES
YSE I:
diam,
421
+0.1I
466
+o.12
YSE8 YSE12
Crankpin
104200
-23340
103338
-23300
t
Croas-sectional
views
of
piston
rings:
i-:j.
No.
1 ring
: Barrel-faced t!?e
that
fits exactly
in liner allow-
(chrode-plated)
ing minidru!tr
g!!s
escape.
No.
2
ring
:
Tapered
tj.pe that also
serves
to
scrape oil down.
No.
3 ring
*
lE
ou ""*.
Reaasembly
1) Reaasembly
of
piston
dngs
1.1
Clean
piston
Iing
grooves before ring
placement,
preferably
with ar old ring
Oroken),
Beveled tlpe
that
prevents oil from
coming
up as
well as scrape
it
down.
29