Diesel Fuel System - Ford 4000 Series Shop Manual

Paragraphs 120-128
Fig. 116-Use alignment pins when Installing
gasket, secondary diaphragm assembly and
cover.
over the pins with gasket ears over the
primary cover ( 38) mounting screws.
Mount the secondary diaphragm as-
sembly on pins with button against
valve lever . Place cover ( 8) on pins so
that it will be right side up when
mounted on tractor and install three
retaining screws. Remove the align-
ment pins and install the other three
screws. Refer to Fig. 117 and tighten
cover retaining screws while pulling up
on diaphragm screw (9-Fig. 110) with
pliers. Reinstall primer coil assembly
and connect to 12-volt battery to check
Fig. 117-Pull up on diaphragm with pliers while
tightening cover retaining screws.
primer operation. Apply air pressure to
converter inlet and check for leakage
at vapor outlet with soap bubble. Ac-
tuate primer either manually or elec-
trically to check for fuel flow out of
vapor outlet; volume will not be great
but escaping air should be audible.
Reinstall converter by reversing re-
moval procedure. Be sure to bleed any
trapped air from the converter by loos-
ening top water hose.
DIESEL FUEL SYSTEM
The diesel fuel system consists of three
basic components : the fuel filters, injec-
tion pump and Injection nozzles. When
servicing any unit associated with the fuel
system , the maintenance of absolute
cleanliness is of utmost Importance. Of
equal Importance is the avoidance of
nicks or burrs on any of the working parts.
Probably the most important precaution
that service personnel can Impart to
owners of diesel powered tractors is to
urge them to use an approved fuel that is
absolutely clean and free from foreign
material . Extra precaution should be
taken to make certain that no water enters
the fuel storage tanks.
TROUBLESHOOTING
All Diesel Models
120. If the engine will not start, or
does not run properly after starting,
refer to the following paragraphs for
possible causes of trouble.
121. FUEL NOT REACHING
INJECTION PUMP. If no fuel will
run from line when disconnected from
pump, check the following:
Be sure fuel supply valve is open.
Check the filters for being clogged
(Including filter screen in fuel
supply valve).
Bleed the fuel filters.
Check lines and connectors for
damage.
122. FUEL REACHING NOZ-
ZLES BUT ENGINE WILL NOT
START. If, when lines are discon-
nected at fuel nozzles and engine is
cranked, fuel will flow from connec-
tions, but engine will not start, check
the following:
Check cranking speed.
Check throttle control rod adjust-
ment.
Check pump timing.
Check fuel lines and connections for
pressure leakage.
Check engine compression.
123. ENGINE HARD TO START.
If the engine is hard to start, check the
following:
Check cranking speed.
Bleed the fuel filters.
FORD
Check for clogged fuel filters.
Check for water in fuel or improper
fuel.
Check for air leaks on suction side of
transfer pump.
Check engine compression.
124. ENGINE STARTS; THEN
STOPS. If the engine will start, but
then stops, check the following:
Check for clogged or restricted fuel
lines or fuel filters.
Check for water in fuel.
Check for restrictions in air intake.
Check engine for overheating.
Check for air leaks in lines on suc-
tion side of transfer pump.
125. ENGINE SURGES, MIS-
FIRES OR POOR GOVERNOR
REGULATION. Make the following
checks:
Bleed the fuel system.
Check for clogged filters or lines or
restricted fuel lines.
Check for water in fuel..
Check pump timing.
Cheek injector lines and connections
for leakage.
Check for faulty or sticking injector
nozzles.
Check for faulty or sticking engine
valves.
NOTE: On models with O . A.V. fuel Injec-
tion pump, refer also to paragraph 152.
126. LOSS OF POWER. If engine
does not develop full power or speed,
check the following:
Check throttle control rod adjust-
ment.
Check maximum no-load speed ad-
justment,
Check for clogged or restricted fuel
lines or clogged fuel filters.
Check for air leaks in auction line of
transfer pump.
Check pump timing.
Check engine compression.
Check for improper engine valve gap
adjustment or faulty valves,
127. EXCESSIVE BLACK
SMOKE AT EXHAUST. If th'e engine
emits excessive black smoke from ex-
haust, check the following.
Check for restricted air intake such
as clogged air cleaner.
Check pump timing.
Check for faulty injectors.
Check engine compression.
FILTERS AND BLEEDING
Model 3000 With Simms Fuel
Injection Pump
128. MAINTENANCE. On models
produced prior to 12-68, the fuel filter
head is fitted with two renewable type
elements as shown in Fig. 118. On
models produced after 11-68, only one
filter assembly is used. Water drain
plug (cap) should be removed each 50
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