Specifications

6–9
Replacement Procedures and Parts
(Shuttle) Cam and Flywheel (FD–38890–01)
1. Unplug the printer power cord from the AC receptacle to insure that
there are no hazardous voltages present while servicing this equipment. It
is also recommended that an anti–static wrist strap(29–26246–01) be
worn, especially while servicing logic components.
2. Remove the paper supply from the print station and tractors.
3. Remove the lower paper guide (Figure 6–7, page 6–40, item #16), four
(4) 1/4” screws, this will allow access to the shuttle motor, when
tightening of the shuttle belt becomes necessary during the re–assembly
steps.
4. Loosen the four (4) shuttle motor mounting nuts, to aid in the removal of
the flywheel assembly.
5. Remove the counterweight assembly:
a. Remove the cam cover (Figure 6–7, page 6–40, item #4), and the
cam cover plate (item #12), to gain access to the counterweight
assembly.
b. Remove the front two (2) allen screws (Figure 6–13, page 6–52,,
item #21), from the counterweight base plate, and just loosen the rear
screw.
c. Remove one (1) allen screw (Figure 6–13, page 6–52, item #3), from
the counter–weight assembly. (Right side of printer deck)
d. To remove the counterweight, slide the assembly forward, toward the
front of the printer. Exercise care while removing the counterweight
assembly, so as not to lose the counterweight spring guide shims.
6. Remove the two (2) allen screws (Figure 6–14, page 6–54, item #11),
which secure the flywheel assembly to the printer deck. The flywheel
can now be lifted up and away from the deck casting.
7. When re–installing the flywheel, the shuttle motor belt should first be fed
onto the shuttle motor sprocket, then onto the flywheel. Exercise care
when handling the flywheel, so as not to damage the MPU (magnetic
pickup unit). Replace the two (2) allen screws, which hold the flywheel
in place, and tighten to the recommended torque specifications.
(Appendix D)