Ricoh B230 Service Manual page 174

Avoid touching these spring terminals [D].
6. Pass the harness of the toner pump unit behind the hook [E], while pressing at
[F].
7. Secure the toner supply tube with the holder [G], lifting up the edge of the holder
"very gently".
Be careful when you lift the edge of the holder, because the holder is easily
broken.
8. Insert the toner pump unit [H] into the rear frame of the machine (
B230/B237 3-46
x 2).
SM