Flowserve SMB Series Electric Actuators - Manual (Page 60)

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
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4. Locate screw in threaded area of the Bearing Cartridge Stem (piece #45) and remove. Remove
Bearing Cartridge Stem.
5. Remove the Worm (piece #53) and the Ball Bearing (piece #82).
6. Locate set screw in Bearing Locknut (piece #83). Remove set screw and Bearing Locknut.
Remove the Ball Bearing (piece #82).
7.3.4 SMB-0, 1, 2, 3 and 4 Reassembly
a CAUTION: Read gasket instructions before replacing gaskets.
To reassemble, follow the disassembly procedure in the reverse order, noting the following:
• Step #24 of Disassembly procedure—stack Belleville Springs (piece #56), Thrust Washers (piece
#48), and Spacers in the exact order as they were removed.
• Step #23 of Disassembly procedure—reinstall Elastic Stop Nut (piece #85) with the same number
of turns as was used to remove.
• Step #17 of Disassembly procedure—align Declutch Link (piece #9) with Declutch Lever (piece
#10) to assure correct lever positioning.
• Step #16 of Disassembly procedure—install the Worm Shaft Clutch (piece #50) with smaller set of
lugs first to engage with lugs on Handwheel Clutch Pinion (piece #42).
• Step #10 of Disassembly procedure—rotate Worm Shaft Clutch (piece #50) to engage splines on
Worm Shaft (piece #43) to replace Worm (piece #53). Replace Declutch Lever (piece #10) and
Handwheel (piece #5) temporarily. Rotate handwheel in opposite direction used to remove Worm
to place actuator in manual operation and to thread the Worm into engagement with the Worm
Gear (piece #16).
• Step #9 of Disassembly procedure—before replacing Spring Cartridge Cap (piece #4), align
Torsion Spring (piece #54), which holds the Declutch Lever in its normal position. Remove
Declutch Lever (piece #10) and replace Spring Cartridge Cap (piece #4), and Spring Cartridge Plate
with Gasket (piece #71, 72). Do not bolt tightly. Depress Declutch Lever into manual operation
and, while holding down Declutch Lever, secure Spring Cartridge Cap (piece #4).
• Step #5 of Disassembly procedure—ensure the Motor Pinion (piece #40) is a tight fit on the motor
shaft (preferably a light press fit).
NOTE: The SMB-0 Motor Pinion (piece #40) is installed with the set screw lockwire between the
gear teeth and the motor flange. On the SMB-1 through 4, the gear teeth are between the set screw/
lockwire and flange.
7.3.5 Gasket Instructions
All gaskets except the housing cover gasket are 1 ⁄
32
" thick ASTM F104 synthetic fiber. The housing
gaskets vary in thickness. To determine the correct size, proceed as follows:
1. Clean Housing Cover (piece #3) and main Housing (piece #2) gasket surface.
2. Install unit Drive Sleeve assembly, including the Bearings (piece #11, 20, 30, 16, 28, 74, 75-78).
3. Install Housing Cover and measure the gap between the Housing Cover and the main Housing.
4. Take measurement and add 10%. Use the closest nominal gasket thickness or combination
available.