Flowserve SMB Series Electric Actuators - Manual (Page 59)

59
SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
flowserve.com
10. Temporarily replace the Handwheel (piece #5) and rotate in the close direction to cause the Worm
(piece #53) to screw out of engagement with Worm Gear (piece #16) and to cause Torque Spring
assembly (piece #29, 44, 45, 48, 56) to emerge from the Housing (piece #2). Remove Worm and
Torque Spring assembly completely.
NOTE: The cartridge may be further disassembled. See separate disassembly instructions below.
11. Remove Housing Cover (piece #3).
12. Remove Drive Sleeve Assembly completely from the actuator Housing (piece #2). The drive
sleeve assembly consists of Locking Nut (piece #30), Stem Nut (piece #20), Drive Sleeve (piece
#11), Upper Thrust Bearings (piece #77 , 78), Worm Gear (piece #16), Worm Gear Spacer (piece
#28), and Lower Roller Bearing Cone (piece #75). Press off the Lower Roller Bearing Cone (piece
#75) to further dismantle the drive sleeve assembly.
13. Remove Retaining Ring (piece #89), Split Ring Retainer (piece #27), and Split Ring (piece #47).
Pull the Worm Shaft Clutch Gear (piece #41) from the Worm Shaft (piece #43).
14. Remove Clutch Gear Spacer (piece #46)—only on SMB-0 and SMB-1.
15. Spread Clutch Trippers (piece #32) with a tool to shift the actuator into motor operation.
a CAUTION: Do not use hands. Spring forces could cause personal injury.
16. Remove bolts holding Clutch Housing (piece #1) to Housing (piece #2). Withdraw Clutch
Housing together with the Trippers (piece #32), and Declutch Fork (piece #12). Worm Shaft
Clutch (piece #50) will slide off Worm Shaft (piece #43).
17. Slide Fork Return Spring (piece #58) off of Worm Shaft toward motor end. Slide Declutch Link
(piece #9) off splined Declutch Shaft (piece #24). Remove Retaining Ring (piece #73).
18. Remove Elastic Stop Nut (piece #84) and remove Handwheel Gear (piece #7), which is keyed to
the Handwheel Shaft
(piece #25).
19. Remove bolts holding Worm Shaft Bearing Cap Assembly (piece #8) and slide cap off the
Worm Shaft. Retaining Ring (piece #92), Handwheel Pinion Spring (piece #57), Spring Ring
(piece #17), and Handwheel Clutch Pinion (piece #42) are part of the Worm Shaft Bearing Cup
Assembly.
20. Remove the Bearing (piece #81) and Worm Shaft (piece #43) assembly from the Housing (piece
#2).
21. Tap on the motor end of the handwheel shaft, which will free Bearing (piece #80) from Housing
to remove handwheel shaft. Handwheel Shaft (piece #25) will break free from Bearing (piece
#79). Remove Handwheel Shaft (piece #25) from Housing.
7.3.3 Worm and Torque Spring Disassembly
1. Withdraw Declutch Shaft (piece #24) from handwheel end of Housing.
2. Remove Elastic Stop Nut (piece #85), noting the number of turns to remove it.
3. Remove Thrust Washers (piece #48), Torque Limit Sleeve (piece #29), and Belleville Springs
(piece #56).
NOTE: Note the orientation of the Belleville Springs for reassembly later.