Service manual

Ribbon Pulley (60 tooth)
Preparations
The exterior cover must be removed prior to proceeding. (980428-101)
Tools:
11/32 Allen driver
50 980428-131 Rev. 1 Prelim.
Removal
1. Loosen the ribbon belt by rotating the belt
tension idler counter-clockwise. Lift the
ribbon belt off the ribbon pulley.
2. Rotate ribbon pulley to view set screw from
the top of the center panel. Loosen set
screw.
3. Remove ribbon pulley from shaft.
Ribbon
Pulley
(60 Tooth)
Ribbon
Drive Belt
(324 tooth)
Platen
Pulley
Clutch
Belt
Tension
Idler
Power Supply
Location
Rewind
Pulley
Installation
1. Slide a nylon washer and then the ribbon
pulley onto the tube shaft. The pulley's set
screw faces the center panel.
2. Hold ribbon take-up tube against shaft
support housing and center panel. Use a
.005 inch shim to space pulley from shaft
support housing. Tighten set screw to 11
inch-pounds torque. Use a thread lock
(Loctite) on the set screw.
3. Place the belt on rewind pulley behind the
power supply.
4. Place the belt over the belt tension idler and
around the outside gear of the pulley clutch.
Rotate the tension idler counter-clockwise
to provide slack. Pull the belt over the
ribbon pulley. Release the tension idler.