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Baker Hughes
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Switching from Auto Operation to Manual Operation Mode
1. Remove the pneumatic pressure to de-energize actuator.
2. Align the helical groove on the Piston Rod (2) with a groove in the Adapter (54) by rotating the Handwheel (63).
3. Rotate the Gear Box Cover (38) in the clockwise direction while holding down the AUTO button until the MANU
button releases. If the MANU button does not release, slightly rotate the handwheel until the MANU button releases.
During assembly or maintenance, and under operation in some conditions, the operators
or technicians must be alert and aware of all possible pinch points or areas where there are
moving or sliding components.
Ensure that the MANU button is fully released and the Gearbox Cover (38) is firmly locked at the
manual position (no rotation). Sudden valve movement can occur in manual mode if the Piston
Rod (2) power screw is disengaged.
Figure 5 - Auto/Manu Buttons and Piston Screw
AUTO button
MANU button
Figure 4 - Adapter and Piston Rod
Adapter
Piston Rod
Helical Groove
