Volvo Penta TD520GE Workshop Manual page 110

Repairing components
Oil cooler, leakage check
(22312)
Special tools:
Pressure-testing equipment ......................... 999 6662
Clamp for cooler .......................................... 999 6685
Plug M26x1.5 .................................... part no. 942352
Spacer 30 mm (eg. socket 10 mm)
NOTE! During the check, the oil cooler should be as dry as possible within, since remaining water may have a
sealing effect on a possible crack. Also, water may not seep into the oil cooler during the check.
NOTE! Avoid starting or stopping the ventilation system or letting air in or out of the premises during the check.
This would change the air pressure in the premises, which may be misinterpreted as leakage.
NOTE! The oil cooler should, during the check, have the same temperature as the surroundings. It may not be
repaired.
120
5. Fit a new aluminium washer on the hollow Allen
key screw. Use thread-sealing compound
(1161053-2) for the threads.
6. Tighten the hollow screw in two steps.
Initial torque: .......................... 80 Nm (66.6 lbf ft)
Final torque: ....................... 160 Nm (118.4 lbf ft)
7. Fit a new O-ring on the Allen key plug and oil
lightly.
8. Tighten the plug to: ................. 80 Nm (66.6 lbf ft)
9. Fit the oil cooler with a new gasket.
1. Place a clamp (2) on the oil cooler (3), as shown
in the picture. Make sure that it is properly tighte-
ned.
2. Plug the other connection (1).
3. Connect the pressure-testing equipment.
4. Place the oil cooler in a tub of water.
5. Set the air pressure to 100 kPa (14.5 psi).
Check if there are air bubbles coming from the oil
cooler.
6. Increase the pressure to 500 kPa (72.5 psi).
Hold the pressure for 1 minute.
The pressure may not drop.
NOTE! If the pressure drops during the check, there
is a leakage and the oil cooler must be replaced.
Group 22