Chapter 3 Fuel Injection Equipment
11. Troubleshooting
4LHA Serit
Malfunctions
3.
The injection
timing
is too
retarded and the
engine is
overheating or
the exhaust
contains smoke
4.
The nozzle or
the nozzle
holder is not
functioning
properly
The
engine
cannot
reach
its
maximum
speed
The
engine's
maximum
speed
is too
high
Idling
is
unstable
Causes
1. The governor spring is too weak
or is improperly adjusted
2.
The control lever is not reaching
the maximum-speed position
3.
The nozzle's injection operation is
poor
1. The governor spring is too strong
or is improperly adjusted
2.
The governor flyweights or
governor sleeve movement is not
smooth
1. The injection quantities are not
uniform (the delivery valve is not
operating properly)
2.
The governor's idling adjustment
is
improperly adjusted
3.
The plunger is worn
4.
The plunger spring is broken
5.
The rubber damper is worn.
6. The governor lever shaft pin is
worn excessively
7. The feed pump blades are not
operating properly
8. The regulating valve is stuck in
the open position
9.
The fuel
filter
element is clogged
and
therefore fuel oil delivery is
poor
10.
The nozzle or the nozzle holder
is
not functioning properly
Remedies
Readjust
Inspect, and then repair or replace
Readjust
or replace
Readjust
Repair
or replace
Readjust
or replace
Repair
or replace
Inspect or replace
Readjust
Replace
the distributor assembly
Replace
Replace
Replace
Repair
or replace
Replace
Clean
or replace
Inspect and then repair or replace
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