Table 14-1.
Fuel Injection Pump Troubleshooting Chart (Cont)
MALFUNCTION
PROBABLE CAUSE
CORRECTIVE ACTION
DURING OPERATION (Cont)
e.
Maximum fuel setting at
e.
Adjust per paragraph 14-45.
low limit or too low.
2. Fuel reaching nozzles
f.
Throttle arm travel not
f.
Check installation and adjust throttle linkage.
but engine will not
sufficient.
(para 14-45)
start. (Cont)
g.
Rotor badly scored.
g.
Replace hydraulic head and rotor assembly.
(para 14-45)
3. Engine starts hard.
a.
Transfer pump blades
a.
Replace. (para 14-45)
worn or broken.
b.
Delivery valve retainer
b.
Inspect delivery valve stop seat for erosion,
screw loose and leaking
tighten retainer screw, or replace head
or incorrectly installed,
and rotor assembly as needed. (para 14-45)
c.
Plungers sticking.
c.
Disassemble and inspect for burrs, corrosion
or varnishes.
(para 14-45)
d.
Metering valve sticking
d.
Check for governor linkage binding, foreign
or closed.
matter, burrs, etc. (para 14-45)
e.
Pump timed incorrectly
e.
Correct timing.
(para 14-49)
to engine.
f.
Excessive fuel leakage
f.
Replace rotor and hydraulic head assembly.
past plungers (worn or
(para 14-45)
badly scored).
g.
Transfer pump faulty,
g.
Remove and inspect parts. (para 14-45)
pressure too 10W.
h.
Cam, shoes or rollers
h.
Remove and replace. (para 14-45)
worn.
i.
Automatic advance
i.
Remove, inspect, correct and reassemble,
fault y or not operating.
(para 14-45)
j.
Governor linkage out of
j.
Adjust governor. (para 14-44)
adjustment.
k.
Governor not operating;
k.
Disassemble, inspect parts, replace if
parts or linkage worn,
necessary and reassemble. para 14-45)
sticking or binding, or
incorrectly assembled.
1.
Maximum fuel setting at
l.
Adjust pump per paragraph 14-48.
low limit or too low.
m. Shut-off device interfering
m. Check and adjust governor linkage dimensions.
with governor linkage.
(para 14-45)
n. Rotor badly scored.
n.
Replace hydraulic head and rotor assembly.
(para 14-45)
4. Engine starts and
a.
Failure of electrical
a.
Remove, inspect and adjust parts. Replace
stops.
shut-off .
parts as necessary.
(para 14-46)
14-33