Fuel Injection Pump - Ford 4000 Series Shop Manual

Paragraph 151
VALVE
SEAT
SCRAPER NOZZLE
Fig. 129-Use scraper to clean carbon from valve
seat In nozzle body.
Fig. 130-Pressure chamber carbon remover is
used to clean annular groove as well as clean
carbon from pressure chamber In nozzle.
Fig. 131-A back flush attachment Is Installed on
nozzle tester to clean nozzle by reverse flow of
fluid; note proper Installation of nozzle In the
adapter unit.
end first into the adapter and secure
with knurled nut. Rotate the needle in
nozzle while operating tester lever.
After nozzle is back flushed, the seat
can be polished by using a small
amount of tallow (J8537-28) on the end
of a polishing stick (J8537-21) and ro-
tating stick in nozzle as shown in Fig.
132.
If the leak-back test time was
greater than 40 seconds (refer to para-
graph 148), or if needle is sticking in
bore of nozzle, correction can be made
by lapping the needle and nozzle as-
sembly. This is accomplished by using
a polishing compound (Bacharach No.
66-0655 is suggested) as follows: Place
small diameter of nozzle in a chuck of a
drill having a maximum speed of less
than 450 RPM. Apply a small amount
Fig. 132-Polishing needle valve seat with tallow
and polishing stick.
Fig. 133-Chuck small diameter of nozzle In slow
speed electric drill to lap needle to nozzle If leak
back time Is excessive or needle sticks in nozzle.
Hold pin end of needle with vise grip pliers.
Fig. 134-Be sure dowel pins In nozzle holder
body enter mating holes in nozzle.
of polishing compound on barrel of
needle taking care not to allow any
compound on tip or beveled seat por-
tion, and insert needle in rotating
nozzle body. Refer to Fig. 133. Note: It
is usually necessary to hold upper pin
end of needle with vise-grip pliers to
keep the needle from turning with the
nozzle. Work the needle in and out a
few times taking care not to put any
pressure against seat, then withdraw
the needle, remove nozzle from chuck
and thoroughly clean the nozzle and
needle assembly using back flush
adapter and tester pump.
Prior to reassembly, rinse all parts in
clean fuel oil or calibrating fluid and
assemble while still wet. The injector
inlet adapter (Simms only) normally
FORD
NOZZLE
HOLDER
BODY
NOZZLE
NOZZLE RETAINING
NUT
SHIM
WASHER
(2701 E -9K548)
Fig. 135-Cross- sectional view showing shim
washer Installed between nozzle and nozzle re-
taining nut.
does not need to be removed. However,
if the adapter is removed, use a new
copper sealing washer when rein-
stalling . Position the nozzle and needle
valve on injector body and be sure
dowel pins in body are correctly located
in nozzle as shown in Fig. 134. Install
the %a-inch shim washer (see Fig. 135)
and nozzle retaining nut and tighten
nut to a torque of 50 Ft.-Lbs. Note:
Place injector in holding fixture
(J8537-11) and tighten nut with socket
(J8537-14). Install the spindle, spring,
upper spring disc and spring adjusting
screw . Connect the injector to tester
and adjust opening pressure as in para-
graph 145. Use a new copper washer
and install cap nut. Recheck nozzle
opening pressure to be sure that in-
stalling nut did not change adjustment.
Retest injector as outlined in para-
graphs 146 through 148; renew nozzle
and needle if still faulty. If the injectors
are to be stored after overhaul, it is
recommended that they be thoroughly
flushed with calibrating fluid prior to
storage.
FUEL INJECTION PUMP
Models 2000, 3000 and
4000 With C. A.V. Pump
151. PUMP TIMING. Refer to Fig.
136. The C.A.V. fuel injection pump is
correctly timed when installed with
scribe line on pump body aligned with
the "0" mark on engine front plate.
NOTE : Some mechanics may prefer to
set Injection pump timing to obtain max-
imum engine horsepower on a dynamom-
eter. If following this procedure, do not
loosen pump mounting bolts when engine
is running. Stop engine to make change In
timing , then restart and recheck horse-
power output on dynamometer.
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