Ricoh G133 Service Manual page 172

Fusing
3. Make sure that the spring [D] is correctly hooked on the pressure lever [E] before
installing the upper frame. (The picture above on the right side shows an example of
how to do it wrong.)
4. Follow the correct order when installing the upper frame.
a) Secure the stepped screws [A] at the rear side first (at this time, do not fully tighten
these screws).
b) Secure the stepped screw [B] and stud screw [C] at the front side tightly.
G133 3-74 SM