Flowserve SMB Series Electric Actuators - Manual (Page 40)

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
40
To reinstall the Stem Nut onto the Keyed Shaft:
1. Lower the Stem Nut into the Drive Sleeve, aligning the splines, until the Stem Nut is seated.
2. Install the Key.
3. Install the Locknut.
4. Stake in two (2) places, 180° apart.
To reinstall the Stem Nut onto a Threaded Shaft:
1. Rotate the Stem Nut on the shaft until the Stem Nut splines engage the Drive Sleeve splines.
2. Rotate the Handwheel to open the valve until the Stem Nut is seated.
3. Install the Locknut.
4. Stake the top threads in two (2) places, 180° apart.
7.1.2 SMB-000 Disassembly
Piece numbers refer to Figures 7.1-7.2.
1. Verify power to actuator is OFF.
2. Remove or swing open the Limit Switch Compartment Cover (piece #3).
3. Disconnect the leads from the Geared Limit Switch (piece #95) and the Torque Switch (piece
#93). Verify the leads are marked for reconnecting to the terminals.
4. Remove the two screws each on the Geared Limit Switch and the Torque Switch. Remove the
Geared Limit Switch and the Torque Switch.
5. Remove the motor leads from the Motor Terminal (piece #91) inside the limit switch compart-
ment. Remove the Motor Assembly (piece #92) and guide the motor leads through the conduit
opening.
NOTE: The Motor Pinion (piece #20) is keyed to the motor shaft and held there with a set screw to
retain the Motor Pinion in its proper position.
6. Verify actuator is in motor operation in order to unload tripper level (piece #15) assembly.
7. Remove Declutch Lever.
8. Remove Spring Cartridge Cap Cover (piece #43).
9. Remove Spring Cartridge Cap (piece #2).
10. Pull the Worm (piece #24) and Torque Spring Assembly directly out.
11. Remove Tripper Lever (piece #15) assembly.
NOTE: A hex head cap screw (piece #120) locates and secures the Tripper Lever (piece #15) on the
Declutch Shaft (piece #40) (end of shaft should be flush with tripper lever).
12. Remove Housing Cap (piece #6) and Handwheel Assembly (piece #5).
13. Remove Drive Sleeve Assembly completely including pieces #8, 10, 11, 17, 23, 30, 33, 34,
50, 67, and 69. Press off the lower drive sleeve Roller Bearing Cone (piece #67). Slide off all
remaining pieces.
14. Remove Flexloc Nut (piece #77). Remove Worm Shaft Gear (Piece #22).