6. Manually operate fuel transfer pump (Figure 28)
until fuel, free of air, flows from open end of
No.
1
injection line into container (Figure 26)-
WORK TRANSFER PUMP
PRIMING LEVER UNTIL
FUEL FLOWS INTO
CONTAINER
ALWAYS RETURN
PRIMER LEVER TO
LOWEST POSITION
AUJU
Rev
FIGURE
28.
OPERATING TRANSFER PUMP MANUALLY
7
Continue operating transfer pump while assistant
rotates flywheel slowly in clockwise direction.
Stop flywheel rotation at exact point that fuel
stops flowing from No.
I
injection line (one drop
in 2 to
5
seconds is allowed). This point is the
injection pump plunger port closing, regardless
of flywheel position.
Timing is correct
if
port closing occurs when PC
mark on flywheel aligns with timing pointer (Fig-
ure27).
If
the marks do not line up, timing is either
early or late and the timing button must be
changed.
If Step
7
indicates port closing is incorrect (lateor
early) proceed as follows (See Examples):
A.
Mark flywheel in
0.1
inch (2.54 mm) gradua-
tions (about five marks each direction) from
PC mark for calculating required change in
button thickness, Figure 29.
POINTER
?OINTER
EXAMPLE
1
EXAMPLE
2
FLYWHEEL
FRONT SIDE
FIGURE
29.
TIMING
MARKS
8.
9.
10.
B.
C.
D.
Measure distance
in
tenths (or mm) from PC
mark on flywheel to point of actual port clos-
ing found in Step
7.
Multiply distance measured times
.003
inch
(-076 mm) to determine the difference in
thickness required for new button.
One degree of crankshaft rotation equals the 0.1-inch
graduation or .OO&inch button thickness for timing.
Example
1.
The port closing time is /ate by 0.3-inch
(7.6 mm) measurement (3
x
.003"
=
.009"
[3
x
.076
=
.229 mm]).
Since
0.1
inch (2.54 mm) equals .003 inch (.076 mm)
in
button thickness, the installed button is too
thin
by -009
inch (0.229 mm). This means a button
.009
inch (0.229
mm) thickerthan the one installed is required
to
time port
closing
so
PC
mark on flywheel alignsat the timing point-
er when fuel flow stops.
Example
2.
If
PC
timing is too ear/y by 0.4-inch
(10.2 mm), multiply
4
x
.003
=
.012 inch (4
x
.076 mm
=
0.305 mm). In this case, a button .012 inch (0.305 mm)
thinner than the one installed is required.
After determining which timing button is
required, remove injection pump and install
the correct button.
Install new injection pump with No.
1
injection
line connected to injection nozzle.
On early model (Figure 25) injection pumps,
remove capscrew and install valve spring and
capscrew with gasket. Torque capscrew to
75
to
89 ft.-lb. (102 to 120 Nm).
On late model (Figure 24) injection pumps
remove delivery valve capnut and holder to install
spring. Before installing delivery valve spring
push delivery valve back onto its seat using your
little finger. Install spring and valve holder.
If the spring is not seated prop-
erly the valve holder can be
tightened on/y about one-fourth of the way down.
When the spring
is
properly seated the valve
holder can be tightened about three-fourfhs of
the way down by hand. Make cerfain that the
spring is seated properly in the valve holder and
on the delivery valve before torquing.
Torque valve holder to
70
to 75 ft.-lb. (95 to 102
Nm). Loosen valve holder and retorque to
65
to 70
ft.-lb.
(88
to 95 Nm). Install and torque capnut
with gasket to
50
to
55
it.-lb.
(70
to
75
Nm).
Loosen capnut and retorque to
60
to
65
ft.-lb.
(81
to
88
Nm).
33
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by any means, is strictly prohibited.
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