M Motor Actuators
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Y20EBD Valve Linkage for M100 Motor Actuators 19
4. Refer to the technical bulletin provided with the motor actuator and
adjust the actuator travel to drive the stem down and compress the
spring in the housing (turn power off when adjusting M100A slide
stops).
Upper
Visual
Guide
Lower
Visual
Guide
Actuator
Drive
Flat
Washers
Figure 19: Upper Visual Guide Indicating Full Down Travel
5. As shown in Figure 19, when the edge of the upper flat washer is
opposite the notch in the upper visual guide, the travel is properly
adjusted. This represents 0.1 inch (2.54 mm) compression of the
spring with the valve seated.
Drive Down to Open Valves
1. Power the actuator to position the actuator 15° from zero. This is
equivalent to 0.1 inch (2.54 mm) of stem travel.
2. Manually move the rack and spring housing assembly, connected to
the valve stem, to the full up position.
3. Insert the pinion gear into the gear housing with the square hole over
the actuator shaft.
4. Replace the gear cover and tighten the gear cover screws.
5. Allow the actuator to return to zero position.
Upper
Visual
Guide
Lower
Visual
Guide
Actuator
Drive
Flat
Washers
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