Repair Comet Executive Gas
7-40
10. Pull the bottom end of the ribbon under
the return ribbon guide assembly. Bring it
up to meet the other end and connect the
ends of the ribbon with a new pin.
11. Repeat Steps 6 to 10 to replace additional
ribbons. Stagger the positions of the lacing
clips to give the atwork a smooth ow.
NOTE: If the remaining ribbons
are being replaced, refer to
Replacing Worn Ribbons on
page 7-38.
12. Remove the wire/string/guide tape holding
the return ribbon guide assembly in the
high position.
13. Verify the return ribbon tension spring
is functioning correctly; refer to Return
Ribbon Tension Spring Replacement
on page 7-37.
14. Reinstall the protective backplate at the
rear of the unit. This piece should be
handled by two maintenance personnel.
Return Ribbon Drive Roll Friction
Material Replacement
If the friction material on the return ribbon
drive roll is worn smooth, or if the return ribbons
slip in place when tension is adjusted properly,
the friction material must be replaced.
Required Tools
Allen wrench: 5/32”
Caulk Gun
Chain puller
Clean cloth
Hammer
Masking tape
Nail
Pliers
Protective covering
Putty knife: serrated
Screwdriver
Steel brush
Utility knife
Wire/string/guide tape
Wooden wedges
Wrenches:
7-16”
11/16”
1-3/8” or Crescent
Perform only when the unit is OFF
with power disconnected and COOL.
1. Verify the correct replacement parts and
supplies are available, including the size
of the friction material and the cement for
the return ribbon drive roll. See Rolls and
Ribbons on page PL-6.
2. Turn power OFF at the main disconnect
switch.
3. Release tension on the return ribbons. Se-
cure the return ribbon guide assembly in a
high position by tying o from above with
wire or string or guide tape (Figure 7-34).
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