Service manual

Service Manual 7-3
Cleaning and Maintenance 7
The two clutches used in the printer look slightly different but function and
are serviced in the same manner. Refer to the Section 8 topics “Paper-pick
roller, clutch, and paper-empty flag” on page 8-9 and “Lower aligning roller,
clutch, and paper-pass sensorþ1þflag” on page 8-11 for the procedures on
removing the clutches.
n White plastic gear train: This gear train from the paper-feed motor to the
paper-feed module requires only a small amount of white grease for noise
reduction purposes. Apply it sparingly so that the grease does not fling off of
the gears when they turn. You need only to apply a dab of grease to a single
gear and the grease will migrate throughout the entire gear train.
n White (nylon) plastic bearings and cams: No lubrication required.
Inspecting
Rollers: Replace the rollers when you see any of the following defects:
n Flat spots.
n Out of roundness.
n Cracked rubber.
n Loss of traction (tackiness) causing consistent pick or feed failures.
Figure 7-1. Lubricating the clutches
8699-22
Spring end
fits into slot
of clutch sheeve
Spring end
fits into center
hole of clutch boss
E-ring
Washer
Clutch
boss
Clutch
spring
Clutch
sleeve
Gear
Roller
shaft