A
THE ENGINE
Section
A.6
FUEL INJECTION
PUMP
DRIVING GEAR
LUBRICATOR AND LUBRICATOR FILTER
GAUZE
The
fuel injection pump driviog gear is pressure-
lubricated through a lubricator and lubricator filter
gauze, both
of
which are screwed into tappings
in
the
main feed passage from the oil pump on the left-hand
side
of
the engine.
At every alternate engine oil change
tht' lubricator and
the filter gauze should be withdrawn and cleaned in
petrol. A stiff brush should be used to remove the
particles
of
'sludge' from the filter gauze, and the lubri-
cator should
be
blown clean with compressed air.
A.12
When reassembling, ensure that the copper joint
washers are in good condition and
wiII
make an oil-tight
joint.
Section
A.7
OIL
PRESSURE RELEASE VALVE
The non-adjustable oil pressure release valve
is
situated
at
the rear, on the left-hand side
of
the crankcase, and
is
held in position by a large hexagon nut sealed by a
fibre washer. The release valve spring maintains a valve
cup against a seating machined in the cylinder block.
During major overhauls
or
in the event
of
low oil
pressure, when it
is
known that
all
other components
of
the engine are in good condition, the release valve should
be removed, using tool 18G69, and examined to ensure
that the cup
is
seating correctly and that the spring has
not lost its tension.
If
the valve cup
is
scored
or
shows
signs
of
wear it should be renewed.
The release valve spring should be checked by measur-
ing its free length; it should be renewed
if
it
is
below
the specification given
in
the 'GENERAL DATA' section.
The valve seating can
be
checked by applying engineer's
blue to the conical face
of
the valve and testing for
continuous marking. Should the seating
be
damaged,
the valve cup
mu~t
be
lapped in, using' valve grinding-in
tool 18G69.
~~~i
'J!
A474ttAW
Fig.
A.2
Location
of
the
fuel injection pump
driving
?ear
lubricator and the lubricator filter
on
the
left-.
md
side
of
the crankcase
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