Service manual

PN 4237242C
4.20-2
SERVICE AND REPAIR PROCEDURES
TRAVERSE MOTOR
4. Disconnect the traverse motor. The traverse motor connector is to the right
(Figure 4.20-1) and is labeled as “J5" and “TRAV MOTOR.”
5. Disconnect the following cables, making sure that these cables are free and can be
removed from the instrument:
r J15, J16 and J17 (sensor cables from the Solenoid Interconnect card)
r J1 flex cable (from the Flex Connect card).
6. Disconnect the ribbon tubing that attaches the Traverse Assembly to the fluidics system
(Figure 4.20-1):
r The small aspirate tubing connects to the aspirate syringe manifold.
r The middle tubing connects to port #2 of LV8.
r The large bore, outside tubing connects to the normally open port of LV16.
7. Remove the five fasteners attaching the Traverse Assembly to the lower chassis. There are
three Phillips-head screws, two on the extreme right edge of the traverse mounting
bracket and one Phillips-flathead screw just above the right corner of the tensioner
bracket. The last two fasteners are 1/4 in. nuts located about 4 in. from each end of the
traverse mounting bracket.
8. With the Traverse Assembly on the bench, remove the traverse motor from the traverse
mounting bracket by removing the four retaining screws (Figure 4.20-1).
Installation
Before installing the replacement motor, make sure that it has a wear plate and a rubber seal.
The wear plate is attached to the motor with black RTV compound and the rubber seal is
installed concave end toward the wear plate and lubricated with DOW CORNING 33 Lubricant.
1. Attach the traverse motor to the traverse mounting bracket with the four retaining
screws (Figure 4.20-1).
2. Hang the Traverse Assembly onto the two mounting posts, threading the connector
cables through the lower chassis at the same time.
3. Attach and tighten the three Phillips-head screws (Figure 4.20-1).
4. Attach and tighten the two 1/4-in. nuts onto the mounting posts (Figure 4.20-1).
5. Connect the ribbon tubing to the fluidics system (Figure 4.20-1):
r The small aspirate tubing attaches to the long special fitting at the front of the
aspirate syringe manifold.
r The middle tubing attaches to the #2 port of LV8.
r The larger bore outside tubing attaches to the normally open port of LV16.