Table 14-1. Fuel Injection Pump Troubleshooting Chart (Cont)
MALFUNCTION
PROBABLE CAUSE
CORRECTIVE ACTION
DURING OPERATION (Cont)
4.
Engine starts and
b.
Transfer pump blades
b.
Replace. (para 14-45)
stops. (Cont)
worn or broken.
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.
Cam, roller, or shoes
e.
Remove, check for size and burrs and
sticking.
reassemble.
(para 14-45)
5.
Erratic engine
a.
Transfer pump blades
a.
Replace. (para 14-45)
operation- surge,
worn or broken.
misfiring, poor
governor regula-
b.
Delivery valve retainer
b. Inspect delivery valve stop seat for erosion,
tion.
screw loose and
tighten retainer screw, or replace head and
leaking or incorrectly
rotor assembly as needed. (para 14-45)
installed.
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.
Governor spring worn
e.
Remove and replace. (para 14-45)
or broken.
f.
Cam, roller, or shoes
f.
Remove, check for size and burrs and
sticking.
reassemble.
(para 14-45)
g.
Pump timed incorrectly
g. Correct timing. (para 14-49)
to engine.
h.
Transfer pump faulty,
h.
Remove and inspect parts. (para 14-45)
pressure too low.
i.
Automatic advance
i.
Remove, inspect, correct and reassemble.
faulty or not operating.
(para 14-45)
j.
Governor linkage out of
j.
Adjust governor. (para 14-45)
adjustment.
k.
Governor not operating;
k.
Disassemble, inspect parts, replace if
parts or linkage worn,
necessary and repair. (para 14-45)
sticking or binding.
1.
Wrong governor spring.
1.
Remove and replace with proper spring.
(para 14-45)
m.
Pump housing not full of
m.
Operate engine for approximately 5 minutes
fuel.
until pump fills with fuel.
n.
Governor sleeve binding
n.
Remove, inspect for burrs, dirt, etc.
on drive shaft.
Correct and reassemble. (para 14-45)
14-34