B-l
*
Lower hone into bore
and after
centering
adjust
so
that
stones are
in
contaet with falls.
Diesel
fuel oil or
kerosene can
be
applied
to
the stones
as a
cutting-ceoling
agetrt
B-2*With
the lower
edge of each stone
positioned
even with the lowest edge
of the
bore,
start drill
and boning
proctss. Move
hone
up and
down while reboring to
prevent
formadon of
cutting
ridges.
Checlc
size
frequently.
B-3
-
When bore
is within .0025 of desired
size,
remove
coar$e
stones
and replace with
burnishiag
stor3s.
Continue with burnishing stones until within
.0005
of
desired size
then use
ffnish stones
and
plish
to
ffnal size.
B{-After reboring,
carefully clean cylinder wall with
soap
and water, then
after dryirg thoroughly,
apply
Iight coat of SAE l0 oil to
prevent
rust.
foo
CROs5-HATCH
PATTTNTI
AFTER HONING
IfASIJRI
EORE
AT ITO
POINIS
9OO
APART
TOR
OIII OF ROUIID
CBECX
-b]6-
Figure 26
-
Meosuring Cylinder Bore
tigure 27
-
Honing
Cylinder
Wolls
CRANKSHAFT
1.
Keyways
-
C,ears
-
If
keyways for
fywheel are badly vlorn or chipped, replacement of
the
crankshaft may
be aecessary. Broken or badly
worn
gear
teeth will also necessitate
replacement of shaft.
2,
Cranlpir
-
Inspect cran\rin for
score
marks or
metallic
piekup.
Slight
seore
marks
can be eleaned with
crocus cloth soaked
in oil..If wear
limits,
as stated
in
Clearance
Section,
are
exceeded
by more
than
.002",
it
will be necessary
to
either replace
crankshaft
or
regrind
the
crankpin
to .010 undersize.
CONNECTING ROD
I.
Check bearing
area
(big
end)
for
excessive wear, score marks, running and side
clearance. Replae
rod
and
cap if worn
beyond limits
stated.
2, Connecting rods with bearing area .01ff'undersize are
available for
use
with
reground crarikpin.
PISION
-
PISION
RINGS
Service ring replacement
sets
are
available
in the
standard
size
plus
.AIf,, .O?fiu and
.030"
oversize sets.
Cyl-
inder
bore must
be deglazed before service dng
sets
are
used. Chrome
plated
rings, when used, should be
installed
in the
top
groove.
t.
If the cyliader block
does
not
need reboring
and if the
old
piston
is
within
wear
limits and free
of
score or
scuff marks,
it
may
be reused.
Never reuse old rings,
however.
31
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