Checking the oil level and oil grade

Checking the oil level 

Check the oil level in the coupling (Active on Demand Coupling).

If the oil level is low, check for leaks at:

• the seal for the input shaft
• the seal joint between the coupling (Active on Demand Coupling) and the rear axle
• the seal joint between the control module and the housing.

Check the quality of the oil 

Also check the quality of the oil by feeling and smelling it.

If the oil is dark and smells burnt, the AOC (Active on Demand Coupling) unit must be replaced.

If there is filings/shavings and particles in the oil, the AOC (Active on Demand Coupling) unit must be replaced.

Other information 

• To remove the coupling (Active on Demand Coupling), see Clutch (AOC), replacing .

Fig 2: Filling And Checking Oil In Active On Demand Coupling

Courtesy of VOLVO CARS OF NORTH AMERICA.