SMB/SB Installation and Maintenance Manual 140-11000 • July 20037-32
Flow Control Division
Limitorque Actuation Systems
26. Install Declutch Shaft Assembly through the bottom of the Declutch Housing (piece #2).
a. The Declutch Shaft Assembly consists of Declutch Shaft (piece #30), Torsion Spring (piece #57), Declutch Cap (piece #59),
Drum (piece #27), Declutch Arm (piece #66), Declutch Shaft Washers (piece #70, 3 pieces), Declutch Fork (piece #14), Declutch
Shaft Spacer (piece #69), Collar (piece #103), and Gasket (piece #81).
27. Align scribe marks.
NOTE: Declutch shaft must be installed with keyseat facing right side of declutch housing when viewed from the declutch end of the actuator.
28. Fasten Declutch Cap (piece #59). Observe punch marks.
29. Insert Roll Pin (piece #110) through the Declutch Arm (piece #66) and Declutch Shaft (piece #30).
30. Ensuring that the declutch shaft bottoms against the declutch cap, push the Collar (piece #103) against the top of the housing
and tighten the collar set screw.
NOTE: Ensure that the Oil Seal (piece #105) is properly installed.
31. Install the Declutch Lever (piece #9) and tighten the set screw.
32. Rotate the Declutch Lever clockwise, hold in position, and install the Declutch Lever Stop (piece #28).
33. Install Clutch Trippers (piece #33 and #34) and the Tripper Spring (piece #67).
34. Install the Declutch Housing Cover (piece #4) and Gasket (piece #82).
NOTE: Ensure that Handwheel Oil Seal (piece #108) is in place.
35. Install Worm Shaft End Cap (piece #7) and Gasket (piece #83).
CAUTION: Ensure that the same number of gaskets are installed as were removed during disassembly. Thickness of gaskets must
be sufficient to prevent the end cap from bearing on the drive shaft.
36. Install the Worm Gear (piece #17).
37. Install Torque Drive Sleeve (piece #11) and Drive Sleeve Thrust Bearing (pieces #139, #140).
38. Apply fresh, clean lubricant in the actuator Housing to 1 1/2" from top.
39. Install the Housing Cover Gasket (piece #79) and the Housing Cover (piece #3).
SMB-5 (Thrust Unit Only)
NOTE: If the thrust Adapter Housing (piece #125) assembly was not disassembled, continue to Step 6.
NOTE: Thrust bearing races should be pressed on the Thrust Drive Sleeve (piece #126), in the Thrust Adapter Housing (piece #125),
and the Thrust Bearing Cartridge (piece #128) prior to beginning reassembly procedure.
1. Install the Lower Thrust Bearing (piece #131) in the Thrust Adapter Housing (piece #125).
2. Install the short end of the Thrust Drive Sleeve (piece #126) into the Thrust Adapter Housing (piece #125).
3. Install the Upper Thrust Bearing (piece #131) on the Thrust Drive Sleeve (piece #126).
4. Install the Thrust Bearing Cartridge (piece #128), thread in tight or until drag is felt on Thrust Drive Sleeve, and tighten
set screw.
5. Install Oil Seal (piece #132) and Seal Retainer Plate (piece #129).
6. Lift the actuator or turn upside down and install Thrust Adapter Housing (piece #125).
NOTE: Ensure that the Thrust Drive Sleeve O-Ring (piece #134) is in place.
7. Install Stem Nut (piece #127).
8. Install Drive Sleeve Locknut (piece #130) and crimp or stake the top threads in two places.
CAUTION: The SMB-5 drive sleeve locknut has left-hand threads and must be rotated counterclockwise to install.
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