SMB/SB Installation and Maintenance Manual 140-11000 • July 20037-30
Flow Control Division
Limitorque Actuation Systems
a WARNING: Declutch Housing is under torque spring load.
15. Remove Declutch Housing (piece #2) by loosening the two cap screws evenly and in turn to allow gradual release of the
torque spring preload.
16. Push Hollow Drive Shaft (piece #55) toward the Motor (piece #115) end, loosen set screw, and remove Bearing Locknut
(piece #99).
NOTE: Hold hollow drive shaft using adjustable spanner on splines.
a. Remove Bearing (piece #95) by pushing Hollow Drive Shaft (piece #55) toward declutch end.
b. Remove Geared Limit Threaded Collar (piece #32) and key.
c. Remove Hollow Drive Shaft (piece #55) from declutch end of the Housing (piece #1).
17. Loosen set screw in Cartridge Stem Locking Nut (piece #48) and temporarily replace Declutch Housing (piece #2) with two
screws to compress the torque spring.
a WARNING: Declutch Housing is under spring load.
18. Remove Cartridge Stem Locking Nut (piece #48).
19. Remove Declutch Housing (piece #2) by loosening the two cap screws evenly and in turn to allow gradual release of the
torque spring preload.
20. Pull Bearing Cartridge Stem (piece #45) out partially and remove the Thrust Washers (piece #46), Torque Limit Sleeve
(piece #62), and Belleville Springs (piece #58).
21. Remove bearing cartridge/worm assembly from the Housing (piece #1).
a. Loosen two set screws on Bearing Cartridge Cap (piece #44) and unscrew Bearing Cartridge Stem (piece #45).
22. Slide Bearing Cartridge Cap (piece #44) off toward Worm (piece #56) threads.
23. Loosen set screw and remove Bearing Locknut (piece #100).
24. Press off two Bearing Cone and Cups (pieces #90 and #91).
NOTE: Cups and cones are sets. They must remain together, in sets.
7.4.2 SMB-5 and SMB-5T Reassembly
Piece numbers refer to Figures 7.13, 7.14, and 7.15.
NOTE: Clean the housing and all parts before reassembly. During reassembly ensure that same thickness gaskets and shims are
installed as were removed during disassembly.
SMB-5T (Torque Actuator)
1. Press two Bearing Cone and Cups (piece #90 and 91) onto Worm (piece #56), ensuring that bearing races are matched. Ensure
the Bearing Spacer (piece #92) is installed.
2. Install Bearing Locknut (piece #100) and tighten set screw.
3. Apply heat to the Bearing Cartridge Cap (piece #44) and install onto the Bearing Cone and Cup (piece #90, #91) from the Worm
(piece #56) end. Ensure that the Bearing Cartridge Cap seats on the Bearing .
4. Thread the Bearing Cartridge Stem (piece #45) tightly into the Bearing Cartridge Cap and tighten two set screws.
5. Install Bearing Cartridge/Worm Assembly in Housing (piece #1).
6. Replace the Belleville Spring Assembly components in the following order: Thrust Washer (piece #46), the six Belleville
Springs (piece #58) (stacked as shown), Torque Limit Sleeve (piece #62), and the second Thrust Washer (piece #46).
NOTE: Ensure that the non-beveled flat side of thrust washer is against the springs. Springs stack this way: ( )( )( ).
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