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Perkins 4.99 - Fuel Pump Timing Checks; Fuel Pump Timing Angle Check; Alternative Timing Check Method

Perkins 4.99
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6.
Fit
timing
tool
to
engine
in fuel
pump
position
ensuring
firstly
that
splined
shaft
with
master
spline
is
fully
located
in
pump
drive
shaft
and
then
that
register
of
tool
is
seated in
fuel
pump
locating
aperture
(see
Fig.
N.13).
Lock
splined
shaft
in tool.
If
pointer
is
180"
from
timing
mark,
engine
is pro-
bably
on
wrong
stroke
in wh ich case,
remove
tool
and
set
engine
on
correct
stroke.
7.
Slide
slotted
pointer
forward
so
that
slot
is
half
way
over
mounting
flange.
AIR CLEANERS AND FUEL
SYSTEM-N.7
To check Marking Angle
of
Fuel Injection Pump
1. Release
screw
(5, Fig. N.12) and
remove
splined
shaft
(6).
2.
Ensure
that
slotted
pointer
(2)
is
positioned
with
slot
to
rear
of
tool
and
chamfered
side
of
slot
out-
wards.
At
this
stage,
slotted
end
of
pointer
should
be
kept
well
back
towards
body
of \001.
Ensure
that
flat
in
washer
fitted
behind
pointer
securing
screw
(3)
is
located
over
side
of
pointer.
~
3.
Connect
NO.1
outlet
of
r:;ump
body
to
an
atomiser
N13
8.
Turn
timing
tool
by
hand
in
opposite
direction
to
pump
rotation
(shown
on
pump
nameplate)
to
take
up
backlash
and
check
that
timing
mark
on
mount-
ing
flange
is
central
in
slot
of
pointer
(see
Fig.
N.14) .
9. If
timing
mark
is
not
central,
position
of fuel
pump
drive
gear
should
be
altered
as
detailed
on Page
J.3 so
that
the
mark
is
central
in
slot
with
backlash
taken
up.
10. When
engine
timing
is
correct,
remove
tool.
11. Refit
fuel
pump
in
engine
with
timing
marks
in line.
N14
test
rig
and
pump
up
to
a
maximum
pressure
of
30 atm (31
kgflcm2)
or
440
Ibflin
2
4.
Release
bracket
screw
(4)
and
set
bracket
so
that
chamfered
edge
is in
line
with
relevant
marking
angle
as
given
on
Page
B.12.
5.
Position
timing
tool
on
pump
drive
shaft
with
master
splines
engaged
and
tool
locating
on
spigot
(see
Fig.
N.15).
6.
Turn
pump
in
normal
direction
of
rotation
as
shown
on
nameplate
until
pump
locks.
7.
In
this
position,
slide
pointer
forward
until
it
is
halfway
over
pump
flange
and
check
that
tool
timing
mark
is
central
to
slot
in
pointer.
Alternative
Method
where
No Tool is
Available
A
further
check
is
possible
and
utilises
the
internal
timing
marks
within
the
pump
body.
To be
able
to
see
these
marks
necessitates
the
removal
of
the
inspection
cover.
On
the
fuel
pump
rotor
inside
the
fuel
pump
are
a
number
of
scribed
lines.
each
one
bearing
an indi-
vidual
letter.
A
timing
circlip,
one
end
of
which
has
a
straight
edge
is --positioned
inside
the
pump
body
and
has
to
be
preset
so
that
when
the
appropriate
scribed
line
on
the
fuel
pump
rotor
aligns
with
the
straight
end

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