Instruction manual

198
Chapter 5 Section I: Replacement Procedures
Shuttle Frame Assembly
Removal
1. Prepare the printer for maintenance (page 106).
2. Remove the shuttle cover assembly (page 160).
3. Disconnect the MPU cable connector P03 and shuttle motor cable
connector P02 (page 224, items 5 and 6).
CAUTION To prevent electrostatic damage to electronic components, always wear
a properly grounded static wrist strap when you handle the shuttle
frame assembly.
4. Disconnect the hammer drive and hammer logic cable connectors from
the terminator board on the shuttle frame assembly. (See page 220.)
5. Loosen the side 5/32 inch socket head clamp screws on each end of the
shuttle and pull the clamps back and off the guide shaft. Do not remove
the clamps. Hand tighten the clamp screws to hold the clamps back.
6. Loosen the center 5/32 inch socket head screw enough to release the
shuttle frame assembly from the base casting.
7. Unlock and slide the tractors outward as far as they will go on the tractor
support shaft.
8. Open the forms thickness lever all the way.
9. Grasping the support legs cast on both sides of the shuttle motor, lift the
shuttle frame assembly out of the base casting. Lift it slowly and carefully:
the shuttle frame assembly is heavy.
Installation
1. Install the hammer bank / ribbon mask cover assembly if it was removed
(page 157).
CAUTION To prevent electrostatic damage to electronic components, wear a
properly grounded static wrist strap when you handle the shuttle frame
assembly.
DO NOT remove the grease from the shaft of the replacement shuttle
frame assembly. The shuttle shaft is aluminum, and the clamped ends of
the shaft must be greased to prevent galling.
2. Open the forms thickness lever and move the tractors as far left and right
as possible.
3. Holding the shuttle frame assembly by the support legs cast on both sides
of the shuttle motor, set it into the base casting (page 220). Use both
hands: the shuttle frame assembly is heavy.
4. Align the center 5/32 inch socket head screw in the base casting and
hand turn the screw until only two or three threads have started.
5. Pull the shuttle frame assembly toward the front of the printer and hold it
in this position while you do step 6.