Instruction Manual
D100331X012
1066 and 1066SR F & G Actuators
October 2012
10
WARNING
For 1066SR Only: Avoid personal injury from the sudden release of spring pre-compression by carefully following step 5
below.
5. 1066SR Only: Loosen the cap screw (key 19) a few turns, but do not fully disengage the cap screw threads from the
piston rod at this time. Be sure the piston (key 3) disengages from the end of the piston rod (key 5) as the cap screw
is being unscrewed. If the cap screw is completely removed without removing spring pre-compression, the piston
can be suddenly forced off the piston rod possibly causing personal injury or damage.
If you are unsure of the amount of the spring pre-compression resting on the cap screw, provide an alternate method
of containing spring compression before completely removing the cap screw (key 19, figure 7).
6. Remove the cap screw (key 19). Remove the sealing washer (key 11), piston (key 3), and spring (key 7, for 1066SR).
For size 20 actuators, a flat washer (key 23) will also be removed with these parts.
7. Remove the machine screws (key 24), the travel indicator (key 22), and the spacer (key 26).
CAUTION
When removing the actuator from the valve, do not use a hammer or similar tool to drive the actuator lever off the valve
shaft. This could damage the valve internal parts.
If necessary, use a wheel puller to remove the actuator bearing (key 4) from the valve shaft. It is acceptable to tap the wheel
puller screw
lightly
to loosen the actuator bearing.
8. Remove the actuator from the valve by removing the actuator mounting screws (see figures 5 and 6).
9. Remove the cap screws (key 20), and remove the mounting yoke (key 25) from the actuator.
10. Remove the bearing (key 4) and washer (key 43), and then remove the hub (key 6) from the housing (key 1).
11. Lift the piston rod (key 5) with attached lever and bearing assembly (key 10) out of the actuator housing.
12. Remove one of the two E-rings (key 14) and then remove the pin (key 9). Separate the lever and bearing assembly
from the piston rod.
13. Clean and inspect all parts, and if necessary obtain replacement parts needed for reassembly. Carefully inspect the
hub (key 6), lever, and bearing assembly for excessive wear. If necessary, replace the parts.
Assembly
Refer to figures 4 and 5 when assembling the actuator, and mounting it on the valve. Make sure the yoke (key 25) is
located on the correct side of the actuator to match your application. During reassembly do not apply loading pressure
to the actuator before it is fully assembled. Refer to figure 3.
WARNING
Refer to the two WARNINGS at the beginning of the Maintenance section.
Key number locations are shown in figures 6 and 7, unless otherwise noted.
1. Reconnect the lever and bearing assembly to the piston rod with the pin. Secure the pin with an E-ring on each end.
