194 • Maintenance
EAGLE 2 Operator’s Manual
3. Unscrew the three case screws until they disengage from the top case. They are
captive screws so they will not fall off of the bottom case.
4. Turn the EAGLE 2 right side up and carefully lift the top case away from the bottom
case. Be careful not to lift it so far that it pulls on the main PCB with the cable that
connects the top case to the main PCB.
5. Lay the top case down next to the bottom case to allow access to the flow system.
6. Locate the TC sensor. It has a five wire cable with a connector that mates to a TC sub
PCB that is installed on the main PCB and is normally located in a single sensor flow
chamber next to the pump. Figure 39 on page 185 shows a TC sensor in a typical
location.
7. Unscrew and remove the two screws that hold down the TC sensor bracket.
8. Grasp the TC sensor connector and gently pull it up until it either disengages from the
TC sensor or the TC sensor comes out of the flow chamber with the connector.
9. If the sensor came out with the connector, remove the sensor from the connector.
10. If the sensor stayed in the flow chamber, grasp the sensor and pull it out of the flow
chamber.
11. Plug the replacement sensor into the sensor connector on the TC sensor cable.
12. Insert the TC sensor into the TC sensor chamber in the flow chamber.
13. Line up the holes in the TC sensor retaining bracket with the two standoffs on either
side of the TC sensor chamber.
14. Install the two sensor retaining screws tightening them a little at a time alternately to
push the sensor into its chamber evenly.
15. Confirm that the main PCB is seated in its slots and that its bottom edge is resting on
the bottom of the bottom case. If the main PCB is not seated properly, it may be
damaged when the top case is reinstalled.
16. Make sure that the top case gasket is fully seated in its groove and carefully put the
top case back on the bottom case. If you have any difficulty mating the top and
bottom cases, inspect the placement of the main PCB and the placement of the top
case gasket.
17. Turn the EAGLE 2 upside down and tighten the three case screws to secure the top
case to the bottom case.
18. Calibrate the TC channel as described in “TC Calibration” on page 187.
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