Instruction Manual
D101322X012
1051 and 1052 Size 33 Actuators
June 2017
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10. Make sure that the travel indicator pointer matches the ball or disc position. Remove and install in the proper
position if necessary.
11. Install the cover plate or switch mounting plate (key 59) with cap screws (key 60).
12. Refer to the table of contents for accessory installation procedures.
H Mounting Adaptation
Unless otherwise specified, key numbers referenced in the following procedures are shown in figure 9 for the 1051
actuator and in figure 10 for the 1052 actuator. Unique parts used for the H mounting adaptation are shown in figure
11 for single stub shaft construction and in figure 14 for dual stub shaft construction.
1. To change mounting style or position, the actuator must be separated from the valve body (or other operated
equipment). Remove the cap screws used to attach the actuator to the valve body (or other operated equipment)
and remove the actuator.
2. Determine the desired mounting position. Note that stub shafts are available in standard and reverse constructions
so that proper alignment with the operated equipment can be achieved (see figure 12). Refer to figure 2 for
available mounting styles and positions.
3. If it is necessary to install or change stub shaft(s), the actuator lever (key 27) must be removed. Perform all
applicable operations in the Disassembly portion of the Changing or Replacing Actuator Lever
procedure. Install the
stub shafts for the construction desired (refer to figures 11 and 14) and reassemble the actuator.
4. Determine whether the operated equipment will be mounted on the housing cover assembly (key 33) side or on
the actuator housing boss side of the actuator. Depending on the desired mounting style and position, it may be
necessary to move the operated equipment and travel indicator components to opposite sides of the actuator. If
so, remove the travel indicator components, the operated equipment, and the mounting bracket if used. Install the
operated equipment or mounting bracket in the desired position (on the housing cover assembly or on the actuator
housing boss). See table 2 for recommended torque for the mounting cap screws. Install the travel indicator
components on the side of the actuator opposite the operated equipment. Refer to figure 14 for travel indicator
components used with wrench‐operated extensions and manual actuators.
5. Before coupling the operated equipment to the actuator stub shaft, position the equipment as follows:
For push‐down‐to‐activate (open) action,
the equipment should be in the fully deactivated (closed) position.
For push‐down‐to‐deactivate (close) action,
the equipment should be in the fully activated (open) position.
6. Install the required shaft coupling and the operated equipment.
CAUTION
When adjusting the travel stops to limit rotation, be certain that the rotation produced does not exceed the safe limit of the
operated equipment. Undertravel or overtravel may result in poor performance and/or damage to the equipment.
WARNING
To avoid personal injury and equipment damage from moving parts, keep fingers and tools clear while stroking the
actuator with the cover removed.
8. Stroke the actuator and adjust the down travel stop so that the operated equipment is in the desired position.