Oil Pump Active on Demand Coupling (AOC), Replacing

Oil pump active on demand coupling (AOC), replacing

Note! As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information is always correct.

Preparatory work

Remove:
- the rear section of the exhaust system and the propeller shaft from the flange for the Active on Demand Coupling. See Final drive, replacing, B5254T2, AW50/51 AWD Final Drive, Replacing
- the flange from the Active on Demand Coupling AOC, Pinion seal coupling (AOC), replacing, B5254T2, AW50/51 AWD Pinion Seal Coupling (AOC), Replacing.

Removal

Removing the oil pump

Note! Thoroughly clean around the oil pump before beginning removal.




Position a container underneath the Active on Demand Coupling.
Disconnect the connector for the oil pump. Remove the tie strap.
Remove the bracket and the connector for the control module.
Remove the 2 screws for the oil pump. Pull the pump straight out of the coupling.

Note! Later versions of the oil pump have the socket for the cable harness on the side of the oil pump housing. The cable harness is shorter. This version supersedes all previous versions, including as a replacement part.

Installation

Installing the oil pump




Check that the seat for the oil pump is clean. There must not be any lint from paper or cloths.




Check that the new O-rings are in position. Lubricate the O-rings using oil for the Active on Demand Coupling, P/N 116 1641 (1 litre container).




Install the oil pump. Press the pump in as far as possible. Lightly tighten the 2 M5 screws alternately. Tighten. Tightening Torque

Connect the connector.

Finishing
Fill the AOC (Active on Demand Coupling) with oil. Check the oil level. See Clutch (AOC), replacing, B5254T2, AW50/51 AWD Clutch (AOC), Replacing.
Install the propeller shaft and the exhaust system. See Final drive, replacing, B5254T2, AW50/51 AWD Final Drive, Replacing.