Emerson Fisher 3025 Instruction Manual page 10

3025 Actuator
May 2011
7. Remove the yoke cap screws (key 77), then lift the actuator off the yoke.
8. Remove the lifting lug cap screws (key 44), the lifting lug (key 40), the gasket (key 71) and the spacer if used (key
67). If required remove the cap (key 43) and the travel stop (key 41).
9. Unscrew the cap screws (key 36) and remove the flange (key 34) and gasket (key 72).
10. Unbend the ring retaining (key 59) and slide towards the casing. Remove the 2 ring halves (key 61) and then the
ring retaining.
WARNING
To avoid personal injury from the precompressed spring force thrusting the diaphragm casing away from the actuator,
relieve the spring compression (step 11 below) and carefully remove casing cap screws and nuts (keys 45 and 46) (step 12
below)
11. Relieve the spring compression by unscrewing alternately and slowly the four cap screws (key 32).
12. Remove all the diaphragm casing cap screws and nuts (keys 45 and 46). If required remove the vent (key 49).
13. Lift off the diaphragm casing (key 3).
14. Remove the spring seat (key 29) and actuator spring (key 30).
15. Lift off the stem and diaphragm plate assembly.
16. Unscrew the set screw (key 57) and remove the travel stop (key 52). Loosen the nut (key 10). Remove the ring
retaining (key 11), the wave washers (key 12), the tube (key 51), the diaphragm plate (key 26), the diaphragm (key
47), the O-ring (key 6), the travel stop (key 14), the ring retaining (key 60) and the 2 ring halves.
17. From the diaphragm casing (key 1) remove the retaining ring (key 8), the wiper ring and the seal retainer (keys 4
and 5) and the O-ring (key 6).
18. If required, remove the casing bushings (keys 7 and 33), the pins (key 28) from the diaphragm plate and spring
seat, thread the travel stop if used
(key 66) out of the stem. If required, remove the travel scale, the screws and nuts (keys 74, 75 and 76).
Size P462 Actuator Assembly
1. If removed, coat the bushings (keys 7 and 33) with lithium grease (key 201) and slide them into the diaphragm
casings.
2. Place the wiper ring (key 4) into the seal retainer (key 5). Apply lithium grease (key 201) to the O-ring (key 6), the
wiper ring and seal retainer assembly and install them into the diaphragm casing (key 1). Then place the retaining
ring (key 8).
3. If removed, insert the pins (key 28) into the spring seat (key 29) and diaphragm plate (key 26).
4. Coat the threads of the stem (key 9) with anti-seize lubricant (key 202).
5. Place the two ring halves (key 61) and the retaining ring (key 60). Slide the travel stop (key 14), the O-ring (key 6),
the diaphragm (key 47), the diaphragm plate (key 26), the tube (key 51), the wave washers (key 12) and the
retaining ring (key 11).
6. Coat the internal thread of the 2 nut halves (key 10) with anti-seize lubricant (key 202) and tighten them until the
wave washers are completely compressed.
7. Slide the travel stop (key 52) and tighten the set screw (key 57).
8. Place this stem assembly into the diaphragm casing (key 1). Take care when pushing the actuator stem through the
diaphragm casing so that the threads do not damage the bushing, O-ring or wiper ring.
9. Place the actuator spring (key 30). Apply anti-seize lubricant (key 202) into the four cap screw beds of the spring
seat. Place the spring seat (key 29) so that the cap screw beds will be aligned with the internal threads of the
diaphragm casing (key 3).
10
Instruction Manual
D251402X012