50 A.0500.301/314.C – IM-TW/10.00 GB (0401)
0450
0250
0801
0800
0020
0030
4.7.9 Assembly of rotors and pump cover
4.7.9.1 Assembly of rotors
1. Place the rotors (0020) on the shafts.
2. Place O-rings (0800) on the retainers (0250) and fasten the retainers.
See chapter 4.5 Tightening torque for nuts and screws.
3. Block the rotors against each other by putting a block of soft material between the
rotors.
4. Tighten the retainers clockwise with the specified torque, using the retainer tool.
See chapter 4.5 Tightening torque for nuts and screws.
5. Check all clearances.
4.7.9.2 Assembly of pump cover
1. Put the O-ring (0801) into the groove in the pump cover.
2. Place the pump cover on the rotor case. Be sure that O-ring (0801) stays in the
groove and is not squeezed between pump cover and rotor case.
3. Secure the pump cover with cap nuts (0450).
Retainer tool
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