Service procedures - lubrication system Group 22
84
Oil cooler, leakage test
(Oil cooler removed)
Special tools: 999 6662, 999 6845
1
Flush the coolant side of the oil cooler with water- soluble de-
greasing fluid. Wash the oil side of the cooler with degreas-
ing solvent.
2
In order to discover any small leakages, the oil cooler must
be the same temperature as the room. To achieve this, flush
the oil cooler with water which has the same temperature as
the room until the cooler reaches the required temperature.
Drain off all water in the cooler.
3
Fit leak detection tool 999 6845 and check that it seals cor-
rectly.
Lower the oil cooler into the bath which contains water
that has the same temperature as the room. The leakage
test is to be carried out at 15, 100 and 250 kPa (2.2, 14,5
and 36.3 psi). Begin at 15 kPa and then continue with 100
and 250 kPa. The test period for test pressure each
should last for at least one minute. Air bubbles emerging
from the water connections indicate internal leakage in
the oil cooler. Air bubbles around the oil cooler indicate
external leakage.
4
Connect leak detection equipment 999 6662 to 999 6845.
5
Lift up the oil cooler and remove the leak detection equip-
ment.
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