MAINTENANCE
AND
ADJUSTMENT
-~
....
<
(,
/
.'
Chec
king pis
ton
ring
gap
Unit
:
mm
(in.)
Standard
Servi
ce-
It
em
li
mIt
0
.3
- 0.5 1,$
Pi>!on
ri
ng
gap
(0.0118 - 0.0197)
(0,05
9)
(4) Piston ring clearance in gro
ove
58
The
c!eJ.
r.B.nce
between 8 piston
ring
and its groove
is
spcl:ified for each. TIlls clearance is
depende
nt
on
the condition of the ring or tile groove,
or
both
.
If
tile reading t.aken exceeds
the
repair
lunit,
replace Ihe rin!i end,
if
the replile
ement
ring still
provides
an
txce$SlVe
reading.. it means that the
sroove
is
worn
so
muth
as
to
require
piston
replae.ement.
JlIII
Checking piston
ri
ng
clearance
Unit
: mm !inJ
Item
Standard
Repair
limit
No. 1
0,04
-0
.08
0,2
Piston
ring
(0,00 16
-0
,003
1)
(0,0079)
clearance
No
,2
0,025 - 0,060 0.15
in
the
(0
,00 I a - 0.00236)
(0,0059)
groove
0.025 - 0.060 I 0,
15
No
. 3
(0.00
10
- 0.00236) (0,0059)
(
5)
Pin clearance in
pislon
Replace the
piston
Or
pist
on
pin
if
the
pin clear-
3nce,
as.
c
om
put
ed
fr
om
djam
e
{e
r readings ta
ktn
on pin hole
an
d pin.
exce
e
ds
th
e service limit.
Unit:
mm
On
.l
Irem
Standa
rd
Repair
I
li
mit
I
+0
28
- 0.
006
,
PISton
pin diameter
,
+0
(1
.1
02
-0
.00024)
Pin
clearance
in
the
0-0.016
O.
OS
plston
(0
- 0.0006)
(0.002)
Conne<:ting
rods
(I)
Pill clearance in smaU
end
Replace lIle piston pin
or
bushlllg if
Ul<
pin
clear
·
ance
in
the bushing, ilS computed from diameter
readings. taken
on
pin
and
bushing, exceeds
the
service
Iimi
t.
"-
'-.
1'Ji'ii'i
Miking
piston
pin
[NOTE)
To remove the bushing from and install
it
in
the small e
nd
, the :speci
al
too
l
must
be used.
Before installing the bushing., be
sure
to
haye
the
o
il
holes aligned,
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