86
6 Maintenance
Cleaning the after cooler
n
ote
Cleaning of the after cooler is not a rou-
tine maintenance job.
If the performance of the engine decreas-
es this can be caused by a dirty heat ex-
changer in the after cooler.
The heat exchanger must then be
cleaned.
Possible causes of fouling of the tubes of
the after cooler are:
Small rubber particles from a damaged
-
raw water pump impeller.
Growth of algae or seaweed.
-
-
A possible cause of fouling of the fins of
the after cooler is:
Deposition dust and oil particles.
-
C
aution
The heat exchanger element in the after
cooler is very vulnerable!
n
ote
Only engines with a charge air cooler (after
cooler).
Summary of Contents for DT4.70
Page 1: ...Operation manual DT4 70 DTA4 85 ...
Page 2: ...ii ...
Page 141: ...139 ...
Page 142: ...140 ...