Usage:
With the installation complete as described in this chapter, perform the following check out procedure before beginning the start-up adjustments in Chapter 5.
1. Visual inspection
A. Check the linkage or coupling between the actuator and fuel metering device for looseness or binding.
B. Check for correct wiring in accordance with the Plant Wiring Diagram, Figure 4-1.
C. Check for broken terminals and loose terminal screws.
D. Check the speed sensor for visible damage. If the sensor is a magnetic pickup, check the clearance between the gear and the sensor, and adjust if necessary. Clearance should be between 0.25 and 1.25 mm (0.010 and 0.050 inch) at the closest point. Make sure the gear runout does not exceed the pickup clearance.
2. Check for grounds
Check for grounds by measuring the resistance from all control terminals to chassis. All terminals except terminals 24, 13, and 2 should measure infinite resistance (the resistance of terminals 24 and 13 depends on whether a floating or grounded power source is used). If a resistance less than infinite is obtained, remove the connections from each terminal one at a time until the resistance is infinite. Check the line that was removed last to locate the fault.
3. Stroking the actuator
The actuator may be stroked electronically using the failsafe override in Menu 6 and the start fuel limiter in Menu 4.
Figure 4-8. Plant Wiring Diagram