Servo Valve Test
Measure the resistance between terminals. Resistance should be 25-30 ohms. Check to make sure valve opens or closes by blowing air through port on actuator side. See Fig 1.
Test with and without 12 volts applied between terminals.
SERVO VALVE AIR FLOW
| Check Ports | Air Flow | |
|---|---|---|
| Normal Condition | ||
| 1-2 | Yes | |
| 1-3 | Yes | |
| 2-3 | Yes | |
| 12 Volts DC Applied Between Terminals | ||
| 1-2 | Yes | |
| 1-3 | No | |
| 2-3 | No | |