Mounting On Baumannt Actuators - Fisher 3660 Instruction Manual

3660 and 3661 Positioners
September 2015
other. If necessary, correct alignment by loosening the hex nuts (key 66) and moving the positioner on the
actuator leg as required.
f. Tighten the two hex nuts (key 66) to secure the positioner to the actuator leg.
g. Install the feedback lever assembly and range spring.
Mounting on Baumann Actuators
During the following mounting procedures, refer to figures 2, 5, 6, 24, and 25. Key numbers are shown in either figure
24 for the 3660 positioner or figure 25 for the 3661 positioner.
Figure 5. Actuator Center‐Bolt Mounting
A4949‐1
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.
12
THIN SECTION
Figure 6. Feedback Plate Installation for Baumann
Actuators
ACTUATOR
STEM
VALVE
STEM
1 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.
A7223
Instruction Manual
D101402X012
PILOT SHAFT
FEEDBACK LEVER
ARM ASSEMBLY
1
FEEDBACK
PLATE