Volvo D12 - Page 42

Group 25 Intake and Exhaust System Service Procedures
3
W2000735
Fig. 51: Removing charge air hoses
Remove the air hoses from the charge
air cooler. Install connecting washer
9998288, sealing washer 9998289 and
new O-rings.
9998288
9998289
4
W2000736
Fig. 52: Connecting pressure gauge
Remove the pressure gauge reduction
valve and check that the gauge read-
ing is “0.” Connect the pressure gauge
to the charge air cooler.
5
Open the shut-off valve and set the
pressure gauge to 100 kPa (14.5 psi),
using the reduction valve.
6
Close the shut-off valve. For the
charge air cooler to be serviceable, the
pressure reading must not drop more
than 50 kPa (7 psi) during 30 seconds.
7
If a leak is found, repeat the test a few
times. Also check pressure gauge
hoses and connections.
40