PISTON & ROD GP 9Y8219 - Caterpillar

and 3E-8768 Switches
(R) ON (top or left)(S) NONE (center)(T) OFF (bottom or right)(1) Actuator orientation tabsFigure 7 - Schematic of 3E-8766 and 3E-8768 Switches When the switch contacts 2 and 3 are closed, the backlight connected to switch terminals A and B turns on.Figure 8 - 3E-8772 Switch
(R) ON (top or left)(S) OFF (center)(T) ON (bottom or right)(1) Actuator orientation tabsFigure 9 - Schematic of 3E-8772 Switch When the contacts 1 and 2 of the switch are closed, the backlight connected to switch terminals A and B turns on.When the contacts 5 and 6 of the switch are closed, the backlight connected to switch terminals C and D turns on.Wire Size Requirements
The size of the wire that is used to connect all electrical components must be adequate size for the maximum current in the circuit. All positive battery connections and all negative battery connections to the Customer Connector for the ECM should use 14 AWG wire.The circuit from the Negative Battery Bus Bar to the bridge displays should be made with a minimum of 12 AWG wire. The circuit from the Negative Battery Bus Bar to the bridge displays must be a dedicated circuit that has no other connected components.The CAT Data Link and the ATA Data Link should be wired with 143-5018 Cable (Twisted Pair). The J1939 (CAN) data link should be wired with 153-2707 Cable (Shielded Twisted Pair). All other electronic system circuits should use 16 AWG wire.OEM Wiring Harness
Figure 10 - Correct Wiring Harness Routing at the Connector
(A) 25mm (1 inch) perpendicular length of wire(1) No gap between wire and sealThe routing of the OEM wiring harness should be designed so that the curvature of the wire from the connector meets the standards that are shown in Figure 10 - "Correct Wiring Harness Routing at the Connector".Special attention should be given to the routing of wiring that is near the following components:* Valve corner* Wiring harness connector* Components mounted on the engine* Customer Connector* Display connectorsFigure 11 - Incorrect Wiring Harness Routing at the Connector
(2) Gap between the wire and the sealFigure 11 - "Incorrect Wiring Harness Routing at the Connector" shows the incorrect routing of the wiring harness. When the curvature of the wire is too close to the connector, the seal is stretched away from the wire within the connector. This stretching of the seal provides an opening of the entry of moisture.The wire should exit from the connector perpendicular to the connector. The perpendicular length of the wire should be 25 mm (1 inch) before any curvature exists in the wire.The radius of a bend in the bundle of wires of the wiring harness should be greater than twice the diameter of the bundle of wires.Twisted pair wiring should be used for the ATA Data Link and the CAT Data Link. Twisted pair wiring should have a minimum of one twist per 25 mm (1 inch) of the wiring harness. The twisted pair wires should not be twisted closer than 25 mm