DETROIT DIESEL 53
Trouble Shooting (Engine)
15.2
SUGGESTED REMEDY
1. High exhaust back pressure or a restricted air inlet
Replace faulty injectors if this condition still persists
causes insufficient air for combustion and will result in
after timing the injectors and performing the engine
incompletely burned fuel.
tune-up.
Avoid lugging the engine as this will cause incomplete
High exhaust back pressure is caused by faulty exhaust
piping or muffler obstruction and is measured at the
exhaust manifold outlet with a manometer. Replace
3. Check for use of an improper grade of fuel. Refer
faulty parts.
to Fuel Oil Specifications in Section 13.3.
Restricted air inlet to the engine cylinders is caused by
4. Check for internal lubricating oil leaks and refer to
clogged cylinder liner ports, air cleaner or blower air
the High Lubricating Oil Consumption chart.
inlet screen. Clean these items. Check the emergency
stop to make sure that it is completely open and
5. Check for faulty injectors and replace as necessary.
readjust it if necessary.
Check for low compression and consult the Hard
2. Check for improperly timed injectors and
Starting chart.
improperly positioned injector rack control levers.
Time the fuel injectors and perform the appropriate
The use of low cetane fuel will cause this condition.
governor tune-up.
Refer to Fuel Oil Specifications in Section 13.3.
SEC. 15.2 Page 5
November, 1973
