Disassembly - Fisher 1061 Instruction Manual

Instruction Manual
D100324X012
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
from both sides of the valve. Drain the process media from both sides of the valve.
D Vent the power actuator loading pressure.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the
pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when
loosening the packing box pipe plug.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Key numbers are shown in figures 8, 9 and 11.

Disassembly

The following procedure describes how to completely disassemble the actuator. When inspecting and replacing parts,
perform only those steps necessary to accomplish the repair.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the
process media from both sides of the valve. Use lock‐out procedures to be sure that the above measures stay in
effect while you work on the equipment. Refer to instructions in the appropriate valve instruction manual.
2. Remove the positioner, if one is used. If necessary, refer to the positioner instruction manual for removal
instructions.
3. Unscrew the cap screws and washers (keys 35 and 76), and remove the cover (key 34). If an optional manual
handwheel actuator is used, it will be removed with the cover. Refer to the separate handwheel actuator instruction
manual for instructions.
4. Remove the retaining ring (key 31). If necessary, remove the travel indicator (key 38), by removing the screws (key
29) from the hub (key 30).
5. Inspect, and if necessary, replace the cover bushing (key 32). Remove the travel indicator scale (key 36) by
removing the self‐tapping screws (key 37). Press the bushing out of the cover (key 34).
6. Remove the cap screw and hex nut (keys 13 and 14) for size 30, 40, 60, and 68 actuators; the hex nut and washer
(keys 85 and 84) for size 80 and 100 actuators; or the cap screw and heavy hex nut for size 130 (key 13 and 85).
7. Note the lever/valve shaft orientation. Loosen cap screw (key 29). For size 80, 100 and 130 actuators, rotate set
screw (key 82) clockwise slightly to spread the split portion of the lever (key 28).
CAUTION
When removing the actuator from the valve, do not use a hammer or similar tool to drive the lever (key 28) off the valve
shaft. Driving the lever could damage internal valve parts. On some valves, driving the lever off the shaft could move the
valve disk or ball and bearings away from the centered position, causing subsequent damage to valve parts as the valve is
operated.
If necessary, use a wheel puller to remove the lever from the valve shaft. It is permissible to tap the wheel puller screw
lightly to loosen the lever, but hitting the screw with excessive force could damage valve parts or disrupt the centered
position of the valve disk or ball and bearings.
1061 F & G Actuator
June 2017
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