Ricoh Pro C901 Technical Bulletin page 298

Reissued:07-Aug-12
Model:
Aries-P1.5/C1.5
CAUSE
The plastic piece incorporated with the sintered gear (GEAR: DEVELOPMENT ROLLER
Z29) shrinks and breaks over time, resulting in a backlash which disables consistent
revolution of the development roller. (See figures 1 & 2 below.)
Figure 1: Gears installed in the drum drive unit
JOINT (Development Roller
Drive)
SHAFT:AUGER:COLLECT:JOINT
JOINT (Auger Drive)
GEAR:IDLER:Z31:ASS'Y
STEPPER
MOTOR:MM56:O/C
Figure 2: Cross-section of GEAR: DEVELOPMENT ROLLER Z29
Plastic around the gear breaks
Broken Area
The bearing is pressure fit
T
echnical
GEAR:DEVELOPMENT ROLLER:Z29:
Gear is created by Sintering
Blue area is plastic created by monolithic molding
Parallel Pin: Prevents the gear from rotating
The plastic physically contacts the bearing
B
ulletin
Date:
21-Mar-12
GEAR:DEVELOPMENT
ROLLER:Z29
GEAR:IDLER:Z66:LOWER:ASS'Y
GEAR:IDLER:Z57:DEVELOPMENT:ASS'Y
GEAR:IDLER:Z66:LOWER:ASS'Y
COVER
PAGE: 2/8
No.:
RM077067a