Service procedures - intake and exhaust systems Group 22
124
Charge air cooler, checking for
leakage, TAD-engines
Special tools: 999 6662, 885231, 885232
Check the pressure tester before use.
1
Connect the pressure tester to the workshop air supply and
set the pressure gauge to 100 kPa (14.5 psi) with the reduc-
tion valve.
Note: To lock the reduction valve knob, move the lock ring
axially.
2
Shut off the valve. The pressure gauge dial pointer must not
drop during 2 minutes, otherwise the gauge cannot be relied
upon.
3
Disconnect the charge air hoses from the charge air cooler.
4
Fit connection tool 885231 and sealing tool 884232 together
with new hoses (if needed) on the charge air cooler. Un-
screw the pressure tester reduction valve.
Connect the pressure tester to the charge air cooler.
5
Open the shut-off valve knob and set the gauge to a pres-
sure of 70 kPa (10.2 psi) with the reduction valve.
6
Close the shut-off valve. During one minute pressure may
not drop more than 20 kPa (2.9 psi) otherwise the charge air
cooler cannot be approved.
7
In the event of leakage, repeat the check several times. Also
check the pressure tester hoses and connections.
8
Remove the testing equipment.
9
Connect the charge air hoses.
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