Flowserve SMB Series Electric Actuators - Manual (Page 100)

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
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move the stem upward—usually the open direction. The Stem Nut will lower as the Handwheel
turns, until it bottoms out on the shoulder in the Drive Sleeve and the stem starts to move up.
2. Replace the Bearing Cartridge (piece #168), the Bearing Cone (piece #169), and the Bearing
Cup (piece #170). Ensure the O-Ring (piece #175) and the Quad Ring (piece #176) are properly
installed. Ensure the Bearing Cartridge engages the splines on the top of the Stem Nut—the
Bearing Cartridge will not rotate if engaged improperly.
3. Replace the Spring Cartridge (piece #173) as an assembly with Thrust Washer (piece #178)
installed in the bottom and the Belleville Spring (piece #179) arranged as shown in Figure 8.6.
Also include the Spring Cartridge Cover (piece #180) and the O-Ring (piece #181).
4. Replace the Thrust Washer (piece #178) on the top of the Spring Cartridge.
5. Replace the Spring Housing (piece #163) with a 1 ⁄
32
" gasket.
6. Remove the Cover Plate (piece #188). Realign deflection indicator.
7. Pull the Pointer and the Pointer Shaft outward and move to “O” deflection.
8. Push the Pointer and the Pointer Shaft back in and replace the Cover Plate (piece #188).