injection pump. This can be done on the unit by turning
(3) Timing Method 2. Flow Timing the Pump.
engine switch to RUN. Rotate flywheel about l-inch
counterclockwise so that P.C. mark (fig. 7-78) is below
timing pointer hole.
(e) Rotate blower flywheel clockwise until
When removing tappets which contain timing
fuel flows from Number 1 cylinder fuel line. Continue
buttons, do not allow the portion of the injec-
rotating slowly clockwise until fuel stops flowing. The
tion pump which has the face gear to be lifted
point at which fuel stops flowing from Number 1 cylinder
from its position.
fuel delivery line is the injection pump port closing point.
Stop rotation of engine at exactly the port closing point (1
(a) Install a Number 11 or standard timing
to 2 drops in 5-10 seconds).
button in injection pump. Install pump on engine
(f) Check timing pointer in the timing port
(b) Remove delivery valve cap nut and
pointer coincides with the P.C. mark stamped on flywheel,
the injection pump button thickness is correct. If the P.C.
wrench must be used on delivery valve holder to keep
mark on the flywheel is below the pointer, injection pump
from damaging this part. Lift out delivery valve spring
is closing early, and will require a thinner button. If the
only, and leave it out, replacing delivery valve holder and
P.C. mark on flywheel is above the pointer, injection pump
delivery valve cap nut and gasket.
is closing late and will require a t bicker button. Each mark
on flywheel indicates a difference of 0.006-inch button
thickness or two steps in button code number. (Example:
Number 1 cylinder (closest to blower wheel) is on com-
The P.C. mark on flywheel is above pointer. The pointer
pression stroke, which follows closing of intake valve.
indicates 1 marks difference. A button 0.009-inch
thicker or three steps difference in button number code is
(d) Set control unit lever on injection pump
indicated. Since Number 11 button is installed, a letter C
to wide open or up position (compress stop solenoid
button is needed.)
plunger spring or remove stop solenoid assembly).
Connect Number 1 cylinder fuel line to Number 1 pump
(g) Remove injection pump and insert
outlet so that fuel line projects from the engine, hanging
proper timing button, taking the same precautions not to
lift the assembly containing face gear when removing
line. Connect lines from fuel supply to transfer pumps,
transfer pumps to filter, and filter to injection pump.
Operate fuel transfer pumps to obtain fuel pressure at
(h) Repeat injection pump installation.