VI. Component Failure Analysis
U L-Series Diesel 37
Fuel System
Nozzle component failure (continued)
Description:
Corrosive abrasion of the pintal nozzle
edge caused by direct contact with blow-by
of the combustion gases in the combustion
chamber.
Description:
Nozzle seat damage caused by metal
contaminants in the fuel that pressed onto
the seat area. The condition can cause leaks
or distorted spray patterns from improper
nozzle seating.
Description:
Pintal valve abrasion caused by sulfuric
acid. This condition will cause the nozzle
to stop functioning.
Description:
Foreign material build-up on the nozzle
seat surface. This condition will cause an
injector leak.
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