Ricoh C231 Service Manual page 377

DRUM
[G]
C238R016.WMF
4. Check that the piston motion is smooth.
5. If the motion is stiff, loosen the pump screws [G] and adjust the pump position.
6. After tightening, repeat step 4 and step 3.
[H]
[C]
C238R017.WMF
7. Re-tighten the two screws [H].
8. Check that the piston motion is smooth.
9. Reinstall the E-ring [C].
SM 3-25 C231/C237/C238