DeZurik M3 Manuale - Pagina 10

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DeZURIK

M-Series Manual Actuator

Troubleshooting

Symptom

Actuator closes to wrong position.

Actuator opens to wrong position.

Actuator won't close.

Wrenching square turns, but

actuator doesn't turn.

Actuator turns, but valve doesn't.

Rotation direction of wrenching

square is incorrect.

D10287

Possible Cause

Closed position stop is set

incorrectly.

Open position stop is set

incorrectly.

Obstruction in valve is

preventing closure.

Pin in wrenching square is

sheared.

Valve shaft key in yoke is

sheared.

Yoke-to-shaft key is 90° off.

Page 10

Corrective Action

Adjust closed position stop.

Adjust open position stop.

Remove obstruction.

Replace pin.

Replace key.

Disengage actuator yoke from

valve shaft, turn 90° and

re-engage.

February 2017