Type 4000
3
Figure 2. Type 4000 Positioner Feedback Lever
Arm Assembly (Key 1B)
POSITIONER SPINDLE
(NOT PART OF THE FEEDBACK
LEVER ASSEMBLY)
PIN
BOLT
NUT
FLATHEAD
SCREW
FEEDBACK LEVER ARM
18B2837-A
A7194 / IL
Drain the process media from both
sides of the valve.
Vent actuator loading pressure and
relieve any actuator spring precompres-
sion.
Use lock-out procedures to be sure
that the above measures stay in effect
while you work on the equipment.
Positioner Mounting
Mount the positioner on the actuator and make supply
and instrument connections. Refer to figure 14 for key
number locations. The feedback lever arm assembly
includes the lever arm, pin, nut, bolt, and flathead
screw as shown in figure 2. Depending upon how
much of the positioner is assembled, start the proce-
dure as follows:
If the positioner (key 1A) with feedback lever as-
sembly (key 1B) is already installed on the adapter
housing (key 1C), start with step 7.
If the feedback lever assembly (key 1B) is as-
sembled to the positioner (key 1A) but the positioner is
not installed on the adapter housing (key 1C), start with
step 1.
If the positioner (key 1A), adapter housing (key 1C),
and feedback lever arm assembly (key 1B) are not as-
sembled, start with step 4.
1. If the positioner (key 1A) comes already assembled
with the feedback lever arm assembly (key 1B), but
the positioner is not installed on the adapter housing
(key 1C), remove the feedback lever arm assembly
(key 1B) from the positioner spindle by removing the
flathead screw that holds the lever to the spindle.
Figure 3. Assembling the Type 4000 Positioner to the
Adapter Housing
ADAPTER HOUSING
(KEY 1C)
POSITIONER
(KEY 1A)
MOUNTING
SCREWS
W7369 / IL
Note
Mounting the positioner (key 1A) may be
easier with the adapter housing (key 1C)
removed from the actuator.
2. To remove the adapter housing (key 1C) from the
actuator, remove the two bolts shown in figure 5 and
remove the adapter housing from the actuator. Be
careful not to lose the O-ring (key 167) that goes be-
tween the adapter housing and the actuator.
3. At this point the positioner (key 1A), adapter hous-
ing (key 1C), and feedback lever arm assembly (key
1B) should all be unassembled from each other.
4. Assemble the positioner (key 1A) to the adapter
housing (key 1C) as shown in figure 3. Be sure the
O-rings are in place between the adapter housing and
the positioner, then secure the positioner to the adapt-
er housing with the four screws.
5. Attach the feedback lever arm assembly (key 1B)
to the positioner spindle with the flathead screw as
shown in figure 2.
6. At this point the positioner (key 1A), adapter hous-
ing (key 1C), and the feedback lever arm assembly
(key 1B) should be assembled together.
7. Adjust the pin on the feedback lever arm assembly
for the appropriate actuator travel. For actuators with
3/4-inch (19.1 mm) travel or less, use the 30 degree
markings. For actuator travels greater than 3/4-inch
(19.1 mm), use the 60 degree markings.
Note
The next two steps may be performed in
either order to aid in mounting the posi-
tioner to the actuator depending upon
actuator size:
