Table 4-3. Troubleshooting — continued.
Trouble
Possible cause
Remedy
Engine runs unsteadily
1.
Inadequate fuel supply.
Renew fuel filter and eva-
and power output is low.
cuate air. Tighten fuel line
connections.
2.
Valve clearance out of
Readjust valve clearances.
adjustment, valve spring
Have valve spring renewed.
broken.
3.
Nozzle needles stick.
Have them checked by a
specialist.
Dense exhaust.
1.
Level of motor oil too
Drain to upper mark on dip-
high.
stick.
2.
Level of oil in oil bath
Pour off oil to reduce level
air cleaner too high.
to the mark.
3.
Inefficient compression
Have compression rings and
due to seized or bro-
pistons checked by a specia-
ken compression rings,
list.
Readjust valve clear-
or incorrect valve
ances.
clearances.
Engine overheats.
1.
Cooling fins on cyl-
Clean cooling fins, on cylin-
inders and cylinder
der head in particular.
heads very dirty.
2.
Injectors defective.
Have them checked by a
specialist.
3.
Injection pump delivery
Have it readjusted by a spec-
out of adjustment.
ialist.
4.
Insufficient air inducted
Clear air intake.
to cooling air blower.
Engine oil pressure
Leaks in lubrication system.
Stop engine immediately.
too low.
Check unions on lubricating
pump and oil pressure gauge
for tightness and retighten
screws. Otherwise call in a
specialist.
Battery discharges bet-
1.
Build-up of acid on top
Clean battery with soda solu-
ween uses.
of battery (white-gray-
tion; rinse with clear water.
ish substance) .
2.
Infrequent use (units
Periodically recharge battery
with conventional
(approximately every 3
4-32
