Ricoh pro c901 - Page 298

Technical Bulletin PAGE: 2/8
Reissued:07-Aug-12
Model: Aries-P1.5/C1.5 Date: 21-Mar-12 No.: RM077067a
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
Figure 2: Cross-section of GEAR: DEVELOPMENT ROLLER Z29
STEPPER
MOTOR:MM56:O/C
GEAR:IDLER:Z57:DEVELOPMENT:ASS'Y
JOINT (Development Roller
Drive)
COVER
SHAFT:AUGER:COLLECT:JOINT
JOINT (Auger Drive)
GEAR:IDLER:Z31:ASS'Y
GEAR:DEVELOPMENT
ROLLER:Z29
GEAR:IDLER:Z66:LOWER:ASS'Y
GEAR:IDLER:Z66:LOWER:ASS'Y
Parallel Pin: Preven
t
sthe
g
ear fro
m
rota
t
in
g
The bearing is pressure fit
The plastic physically contacts the bearing
Plastic around the
g
ear breaks
Br
o
k
e
n Ar
ea
GEAR:DEVELOPMENT ROLLER:Z29:
Gear is created by Sintering
Blue area is plastic created by monolithic molding