MWM Acteon Workshop Manual page 152

Lubrication System
Visually check the drive gear of the oil pump, the inner
part of the carcass and the rotor, for damages or
excessive waste.
Check the clearance between oil pump rotors.
Clearance between rotors:
Check the radial clearance between the outer rotor
and the pump carcass.
Radial clearance:
Check rotors axial clearance.
Axial clearance:
0.05 - 0.10 mm
0.06 - 0.10 mm
0.025 - 0.075 mm
9.612.0.006.7160 - 05/04