Service Manual

Multi Pro 5800Page 6 − 90Electrical System
Spray System Valve Actuators
The Multi Pro 5800 spray system uses a number of
valves to control the spray product flow (see the Spray
System chapters in this manual). Each valve has a
12VDC actuator (motor) that can be tested individually.
The boom section valves and agitation valve actuators
are controlled using a three (3) wire circuit. A constant
supply of power is applied to terminals A (+) and B (−),
energizing the actuator to close the valve. Applying
power to terminal (C) reverses the direction of actuator
operation, opening the valve.
Testing
1. Park machine on a level surface, stop engine and en-
gage parking brake. Remove key from ignition switch.
IMPORTANT: Make sure to neutralize and remove
chemicals from pump and hoses before loosening
and removing spray system components. Wear pro-
tective clothing, chemical resistant gloves, and eye
protection during repair.
2. Locate valve actuator to be tested (Fig. 131). Care-
fully unplug machine wire harness connector from valve
actuator, remove the retaining fork and remove the actu-
ator from the valve assembly.
3. Connect 12VDC to terminal A (+ red wire) and con-
nect terminal B to ground (− black wire) The actuator
should rotate in a clockwise direction, stop, and a red
LED should illuminate.
4. Connect 12VDC to terminal A (+ red wire) and termi-
nal C (open white wire), then connect terminal B to
ground (− black wire). The actuator should rotate in a
counterclockwise direction, stop, and a green LED
should illuminate.
5. If actuator dose not operate smoothly in both direc-
tions, replace the actuator.
1. Agitation valve
2. Wire harness connector
3. Boom spray valves (3)
4. Valve actuator
5. Fork
6. Valve closed (red LED)
7. Valve open (green LED)
8. 3 Wire connector
Figure 131
7
6
8
ABC
1
3
4
5
2
6. If the actuator tests correctly, test the valve operation
by manually rotating the valve shaft with a screwdriver.
Repair or replace the valve if necessary (see Spray
Valve Service in the Spray System chapters in this man-
ual).
7. If the actuator and valve test correctly and a circuit
problem still exists, check wire harness (see Electrical
Schematic and Wire Harness Drawings in Appendix A
− Foldout Drawings in this manual).
8. Install the valve actuator and connect it to the ma-
chine wire harness after testing is completed.