1. Mount the oil cooler adapter plate for the leakage testing special tool (1742628) (C) onto the engine oil cooler (1).
2. Use the oil cooler attachment bolts (2) and tighten them to the specified torque for the oil cooler (1).
Use the included O-rings (F) to seal the connection between the oil cooler (1) and the oil cooler adapter plate (C).
3. Install the hose nipples (A) in the oil cooler adapter plate and tighten them to the specified torque.
Use the included O-rings (B) to seal the connection between the hose nipples (A) and the oil cooler adapter plate (C).
4. Install the plugs (D) in the oil cooler adapter plate and tighten them to the specified torque.
Use the included O-rings (E) to seal the connection between the plugs (D) and the oil cooler adapter plate (C).
5. Connect air hoses to the hose nipples (A) and submerge the assembly in a bucket of water as shown.
Make sure that no water leaks into the oil cooler, this contaminates the internal oil cooler circuits.
6. Supply compressed air (maximum 5 bar [72.5 psi]) to the engine oil cooler.
7. Check the oil cooler for leakage.
– Make sure not to detect false leaks at the connection of the hose nipples (A) to the oil cooler adapter plate (C).
– Internal leakage: Air bubbles appear from the submerged air hose of the oil cooler
External leakage: Air bubbles appear from the engine oil cooler (1).
8. Depressurize the engine oil cooler and remove it from the bucket of water.
9. Swap the air hoses on the hose nipples (A) and repeat steps 4-7 for the other circuit.
10. Depressurize the engine oil cooler, remove it from the bucket of water and dismount the oil cooler adapter plate (C).
11. Replace the engine oil cooler (1) if a leak is detected.
– If no leakage is detected, check other possible causes, for example the gearbox cooler.
– Internal leakage of the engine oil cooler almost certainly causes contamination of the cooling system with engine oil.
– If internal leakage is detected, clean the cooling system according to the procedure described in ‘Clean cooling system (Cooling system)’.
Oil cooler adapter plate for leakage testing
