Ducati Diavel Workshop Manual page 75

Maintenance operations
Tighten the bleed valve (5) to a torque of 23 Nm ±10% (Sect. 3 - 3,
Repeat the operation described above until the old fluid flows completely.
Then, with the bleed valve definitely closed to the specified torque actuate repeatedly the lever until a pressure is
detected in the brake system.
Warning
After eliminating the old fluid from the tank, during the refilling operation always keep the oil level above the MIN mark to
prevent the formation of air bubbles inside the circuit.
Changing the rear brake circuit fluid
Operations
Remove the exhaust
Remove the rear wheel
Undo the two fixing screws (9) of the rear brake calliper (10) to the calliper holder bracket and remove the brake calliper
(10).
Remove the ties (A) and the hose clip (B) by loosening the screw (C).
Attach a length of transparent plastic tubing to the bleed valve (8) and insert the other end of the tubing in a container
placed on the floor.
Section reference
8 - 8, Removal of the exhaust
system
7 - 2, Removing of the rear wheel
Frame torque settings) then release the lever.