3660 and 3661 Positioners
Instruction Manual
Form 5265
March 2006
11
ACTUATOR
STEM
VALVE
STEM
FEEDBACK LEVER
ARM ASSEMBLY
FEEDBACK
PLATE
PILOT SHAFT
IF AFTER MOUNTING POSITIONER, THE FEEDBACK LEVER ARM
ASSEMBLY WILL BE ON THE LEFT SIDE OF THE POSITIONER, INSTALL THE
FEEDBACK PLATE SO THE LIP IS UP. INSTALL THE FEEDBACK LEVER ARM
ASSEMBLY, PRELOADED, SO THE PILOT SHAFT IS ABOVE THE PLATE.
IF AFTER MOUNTING POSITIONER, THE FEEDBACK LEVER ARM ASSEMBLY
WILL BE ON THE RIGHT SIDE OF THE POSITIONER, INSTALL THE FEEDBACK
PLATE SO THE LIP IS DOWN. INSTALL THE FEEDBACK LEVER ARM ASSEMBLY,
PRELOADED, SO THE PILOT SHAFT IS BELOW THE PLATE.
1
1
A7223 / IL
Figure 6. Feedback Plate Installation for
Baumann
t
Actuators
1. Determine the positioner mounting configuration
from figure 2. The actuator size, actuator travel, and
positioner action must be known.
2. Attach the feedback plate to the actuator stem
connector by locating the feedback plate between
the actuator stem and valve stem nuts (figure 6) as
follows:
D
If after the positioner is mounted the feedback
lever assembly will be on the left side of the
positioner, install the feedback plate so the lip is up.
D
If after the positioner is mounted the feedback
lever assembly will be on the right side of the
positioner, install the feedback plate so the lip is
down.
3. Unscrew the two machine screws (key 24), and
remove the positioner cover (key 21).
4. As shown in figure 5, a thin knockout section is
cast across the mounting hole in the housing. Check
to make certain this knockout section has been
removed. If the knockout section has not been
removed, use a punch to knock it out.
5. For air to extend actuators, the feedback lever
assembly must be installed into the positioner and
preloaded before attaching the positioner to the
actuator.
6. Attach the positioner to the actuator using a
sealing washer and hex head screw (keys 71
and 72).
7. Install the feedback lever assembly and range
spring.
Mounting on the Type 657 and 667
Actuators
During the following mounting procedures, refer to
figures 7, 24, and 25 for key number locations.
Figure 7 shows keys 61 through 63, 69 and 70, 73
through 78, and 82 through 93. Other key numbers
are shown in either figure 24 for the Type 3660
positioner or figure 25 for the Type 3661 positioner.
1. Determine the positioner mounting configuration
from figure 2. The actuator size, actuator travel, and
positioner action must be known.
Note
The actuator bench set spring load
must be released before removing the
stem connector cap screws. Refer to
the appropriate actuator instruction
manual for this procedure. After
installing the positioner and mounting
hardware, reset the actuator bench set.
2. Attach the connector bracket (key 87) to the
actuator stem connector using washers and cap
screws (keys 70 and 69), but do not tighten the
screws. Refer to figures 7 and 8 for the proper
orientation of the connector bracket with respect to
the actuator stem connector. The face of the stem
connector should be perpendicular to the legs of the
actuator yoke.
3. Refer to figure 8 for the feedback arm (key 88)
location with respect to the connector bracket (key
87). Position the feedback arm so that the pilot shaft
(key 19A) will operate correctly in the slot of the
feedback arm. For actuator travels between 19 and
30 mm (0.75 and 1.18 inches), position the feedback
arm so that the long portion of the feedback arm slot,
when fastened to the connector bracket, is closest to
the positioner (see figure 8). For travels greater than
30 mm (1.18 inches) reverse the feedback arm so
the slot in the feedback arm is opposite the
