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ROUTINE
MAINTENANCE.
1.
DRY TYPE
dIR
FILTER
(Where firted)
It
is
essential
to periodically
clean
the element
by removing
and shaking
the felt
pad,
also
dry
if
necr:ssary.
Carefully
replace
the
ilement.
14.
OIL BATH
ÅIR.
FILTEId
(trVhere
fitted)
It
is
essential
to
fi1l
and
maintain oil to
the indicated level
on
the
filter
bowl
using
clean engine
lubricating
oil.
Occasionallv remove
the
filter
and wash
the
element
in
petrol or paraffin,
allorv
to
drain,
clean
out the
filter
bowl
and replenish
with
fresh
lubricating
oil.
2.
FLYWI{EEL FAN
CASING
Never
operate
the
engine
rvith any part of the fan
casing
removed,
as
this will allow the
engine
lo
overheat and
the piston to
score.
This part
is
absolutclv
necessary
to
rlircct the
alr
florv so
tliat
the
engine
may
be
properly
cooled.
3.
COVER
FOR. ENGINO.
An
engine.which is
exposed
to th,.
u,eather
must
always be covered
up
when
not in
use.
4.
OVER.LO,{I}ING
TEI}T }.INGINE.
Do not overload a cold engine. r\lways allorv
it
to
run light for
a
minute or
two.
5.
CLEANLINESS OF SPARKING
PLUG.
Keep the sparking plug
clean
and
a gap
o{
.025".
6.
DECARBONISING.
Decarbonise
every
400
working
hours.
(See
paragraph (a),
Page
l0).
7.
LUBRICATION OF
ENGINE.
It
is important
to
use good
lubricating oil,
and
the
most suitable
oils
for
these engines
are'-
SUMMER_CASTROL
XL
WINTER
-CASTROLITE
The
oil circulation is
maintained
by
splash
from a dipper on the
con-
necting
rod,
and works
with
a
minimum of
attention.
One
point
of
vital
irnportance is
to
see
that the
engine
never runs
with the oil
level
in the
sump below
the bottom end
of the dipstick,
otherwise
serious
damage
may
be caused
to
the
engirre. In
the
case
of
an
engine
working
at
an
excessive
angle due
to
uneven
or
sloping ground,
it
is
most
important to
keep
the oil
sump
topped
right
up,
so
that
there
is
no
danger
of
the
dipper
missing
the
oil
and
starving
the
engine.
It
is
important that
the
engine
base
is standing
level
when checking
or
re-filling
oil.
Check
the oil
level
with
the
filler
cap unscrewed, remove cap and wipe
dipstick, rest the cap on
top of the oil Iiller
boss
to
obtain
correct
reading.
All
parts are lubricated, including tappets and
valves;
these
are
sealed
in
a dust-light
cover.
After
every
50
hours' running, but more frequently under due§
condltions, and
preferably when
the
engine
is hot,
drain the
oil,
flush
out tlie oil
sump
with
flushing
oil
(paraffin should
not
be
used),
then refill
with
fresh
lubricating oil after
a small
quantity of
fresh
oil
has been
run
through,
to
make
sure
there
are no traces
of
the flushing
oil left in the
sump.
8.
TAPPET ADJUSTMENT.
For method of adjustment
see
paragraph
(a), Page
12 (Valve
Gear).
9.
IF
COMPRESSION
IS
POOR.
(o)
Check
tappet
clearances.
(å)
Check
cylinder
head
nuts, and
tighten
if
necessary.
(c)
Examine valve
seatings.
(d)
Inspect piston
and
piston
rings.
10. TO
INSPECT PISTON
AND
RINGS.
See
that
rings move freely
in
their
grooves
and
are
not
cracked,
worn
or
broken,
that all ring
grooves
are clean, also
see
that the oil
drain
holes
in
the
bottom ring
grooves are clear.
When replacing
see
that
the piston
and
rings
are replaced
as
they
were
fitted
before removal.
1I.
MAGNETOS.
fyp"
e.
576F..2.
(Ref.
Pages
16 and
1Z).
Type
CJ.9B6.
(Ref.
Pages 18
to 2l).
Prrcn
8
Prcn
I
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