Ricoh BR-C1a Basic Service Training page 255

 The white dotted lines in the photo mark the sponge seals.
 Work carefully around the edges of these sponge seals to
avoid damaging them when removing and installing the
blade.
 These seals are not service parts and they cannot be
replaced.
Slide 255
No additional notes
Replacement and Adjustment
Servicing the Drum Cleaning Unit - 1
255
BR-C1 Training