Table 14-1. Fuel Injection Pump Troubleshooting Chart (Cont)
MALFUNCTION
PROBABLE CAUSE
CORRECTIVE ACTION
DURING OPERATION (Cont)
5.
Erratic engine
o.
End plate regulating
o.
Remove piston and sleeve and inspect for
operation- surge,
piston sticking.
burrs, corrosion or varnishes. Replace
misfiring, poor
if necessary. (para 14-45)
governor regula-
tion. (Cont)
p.
Variable speed droop
p.
Replace if necessary. (para 14-47)
device incorrectly
adjusted or faulty.
6.
Engine does not
a.
One or more connector
a.
Replace. (para 14-45)
develop full
screws obstructed.
power or speed.
b.
Transfer pump blades
b.
Replace. (para 14-45)
worn or broken.
c.
Delivery valve retainer
c.
Inspect delivery valve stop seat for erosion,
screw loose and
tighten retainer screw, or replace head
leaking or incorrectly
and rotor assembly as needed. (para 14-45)
installed.
d.
Plungers sticking.
d. Disassemble and inspect for burrs, corrosion
or varnishes.
(para 14-45)
e.
Metering valve sticking
e.
Check for governor linkage binding, foreign
or closed.
matter, burrs, etc. (para 14-45)
f.
Pump timed incorrectly
f.
Correct timing.
(para 14-44)
to engine.
g.
Excessive fuel leakage
g.
Replace rotor and hydraulic head assembly.
past plungers (worn
(para 14-45)
or badly scored).
h.
Transfer pump faulty,
h.
Remove and inspect parts.
(para 14-45)
pressure too low.
i.
Cam, shoes or rollers
i.
Remove and replace. (para 14-45)
worn.
j.
Automatic advance fault y
j.
Remove, inspect, correct and reassemble.
or not operating.
(para 14-45)
k.
Governor linkage out of
k.
Adjust governor. (para 14-45)
adjustment.
1.
Governor not operating;
1.
Disassemble, inspect parts, replace if
parts or linkage worn,
necessary and reassemble. (para 14-45)
sticking or binding, or
incorrectly assem-
bled.
m.
Maximum fuel setting
m.
Reset to pump specification. (para 14-48)
at low limit or too
low.
n. Wrong governor spring.
n.
Remove and replace with proper spring as in
pump specification. (para 14-45)
14-35
