Filter
Top Products
Tractors,
Lawn
and
Garden
-
110
and
112
Engine
20
SM-2059-(Apr-67)
Cylinder
Head
and
Valves
-
Tecumseh
30-5
INSPECTING
BREATHER
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Fig
.
IO-Cleaning
Breather
Filter
The
breather
is
a
sealed
assembly.
Do
not
immers
e
assembly
in
cleaning
solvent.
Carefully
wipe
outsides
of
assembly
with
a
clean
cloth.
After
wiping,
remove
breather
tube
and
clean
tube
thoroughly
in
cleaning
solvent.
Discard
as-
sembly
if
inside
of
breather
assembly
is
full
of
sludge
or
if
assembly
is
distorted.
Replace
complete
assembly
when
vacuum
test
indicates
faulty
breather.
Be
sure
drain
holes
in
breather
assembly
are
not
clogged.
TESTING
VALVE
SPRINGS
Fig.
11-
Valve
Spring
Squarcness
Check
valve
spring
for
squareness,
using
a
steel
square
and
a
surface
plate
,
Figure
11.
Stand
the
spring
and
square
on
end
on
the
surface
plate.
Slide
the
spring
up
to
the
square.
Revolve
the
spring
slowly and
observe
the space be
tw
een
Litho
in
U.S.A.
the
top
coil
of
the
spring
and
the
square.
See
"Specifications,"
page
30-11,
for
out
of
square
limits.
'"
sus
Fig.
12-Valve
Spring
Tension
Check
valve
spring
for
proper
pressure,
Fig-
ure
12.
Refer
to
"Specifications,"
page
30-11,
for
free
length
of
the
spring
and
the
pressure
in
pounds
that
the
spring
should
exert
when
it
is
compressed
to
a
measured
length.
INSPECTING
VALVES
Remove
carbon
from
valve
head,
face,
and
stem
with
a
power-operated
wire
brush.
Be
sure
carbon
is
removed
and
not
merely
burnished
.
Any
carbon
left
OIl
the
stem
will
affect
accurate
alignment
in
the
valve
refacer
collet.
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Fi
g.
73-Faulty
Valves
Check
valve
faces,
heads
and
stems,
Figure
13,
for
de
fects.
Also
look
for
bent
valve
stems
and
excessive
corrosion
causing
pits
on
valve