SMB/SB Installation and Maintenance Manual 140-11000 • July 2003 7-29
Flow Control Division
Limitorque Actuation Systems
SMB-5 Thrust Unit Only
1. Remove Thrust Adapter Housing (piece #125) assembly from the Housing (piece #1).
NOTE: If disassembly of the thrust adapter assembly is not required, continue to Step 2.
a. Remove the Seal Retainer Plate (piece #129) and the Oil Seal (piece #132).
b. Loosen the set screw and remove the Thrust Bearing Cartridge (piece #128) from the Thrust Adapter Housing (piece #125).
c. Remove the Upper Bearing Roller Assembly (piece #131).
d. Lift the Thrust Drive Sleeve (piece #126) out of the Thrust Adapter Housing (piece #125).
e. Remove the Lower Bearing Roller Assembly (piece #131).
2. Using lifting eye bolts, remove Housing Cover (piece #3).
3. Remove the Torque Drive Sleeve (piece #11) and the Worm Gear (piece #17) in this order.
4. Remove Motor (piece #115) and Motor Adapter (piece #5).
NOTE: Record the thickness of gaskets for reassembly.
5. Remove the Intermediate Pinion and Shaft (piece #15) and Motor Drive Intermediate Gear (piece #41) as an integral assembly.
NOTE: Record the location and the thickness of gearing shims in the housing.
6. Remove the Output Worm Shaft Gear (piece #42) and the Bearing Spacer (piece #64).
7. Punchmark Worm Shaft End Cap (piece #7) before removing the cap.
8. Remove the Worm Shaft End Cap (piece #7).
NOTE: Record the gasket thickness for Declutch Housing Cover (piece #4) for reassembly.
9. Remove declutch assembly as follows:
a. Clean grease from assembly as much as possible.
b. Scribe an alignment mark on all parts and shaft for use during reassembly.
c. Remove the Declutch Lever Stop (piece #28), Tripper Spring (piece #67), Clutch Tripper #1 and #2 (piece #33 and #34), and
Roll Pin (piece #110).
d. Loosen set screws on Declutch Lever (piece #9) and Collar (piece #103).
e. Remove the Declutch Lever (piece #9), Declutch Cap (piece #59), and slide the Declutch Shaft (piece #30) out through the
bottom of the Declutch Housing (piece #2), while removing the Declutch Fork (piece #14) and other Declutch Shaft Mounted
Components (piece #66, #70, #69, and #103) from the Declutch Shaft (piece #30).
10. Remove the Handwheel Shaft and Pinion (piece #40), noting how many and which spacers go on either side of the Declutch
Fork (piece #14).
11. Remove the Solid Drive Shaft (piece #43) and the Flexible Jaw Clutch assembly (pieces #50, #73, #74, #75, #76, #97, and #98)
as an integral assembly, Gear Clutch Spacer (piece #47), Sliding Clutch Gear (piece #51), and Clutch Compression Spring
(piece #68).
12. Remove Splined Insert (piece #54) using jack screws, Spirolox Ring (piece #107), and Handwheel Gear (piece #6).
13. Remove Gear Mounting Bracket (piece #8) using jackscrews, Bearing (piece #93), and Bearing Adapter (piece #65).
14. Pull Hollow Drive Shaft (piece #55) toward declutch end and remove Spirolox Ring (piece #106).
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