Flowserve L120-190 through L120-2000 - Manual (Page 28)

Limitorque ® L120-190 through L120-2000 FCD LMENIM1203-00 – 10/11
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12. Lift complete drive sleeve assembly from actuator housing. The drive sleeve assembly consists
of Lock Nut (piece #39), Stem Nut (piece #12), Drive Sleeve (piece #8), Upper Thrust Bearings
(piece #40, #67), Worm Gear (piece #13), Worm Gear Spacer (piece #36) and Lower Thrust Bearing
(piece #14). The drive sleeve assembly may be further dismantled if required by pressing off Lower
Drive Sleeve Bearing (piece #41).
13. Remove Retaining Ring (piece #53-1), Split Ring Retainer (piece #27) and Conduit Nipple
(piece #26). Pull the Worm Shaft Clutch Gear (piece #32) from the worm shaft.
14. Spread clutch trippers with a tool to shift actuator into motor operation.
c WARNING: Do not use hands as spring forces could result in personal injury.
15. Remove bolts holding Declutch Housing (piece #2) to Housing (piece #1). Remove clutch housing,
Trippers (piece #34-A and #34-B), and Clutch Fork Assembly (piece #42-1). Worm Shaft Clutch
(piece #33) will slide off worm shaft when removing clutch housing.
16. Slide Clutch Spring (piece #45) off worm shaft toward motor end.
17. Remove Elastic Stop Nut (piece #16-7). Pull Handwheel Spur Gear (piece #9) that is keyed to Shaft
(piece #17).
18. Remove bolts holding WS Bearing Cap (piece #7) and slide cap off wormshaft. Remove Handwheel
Clutch Pinion (piece #20) from bearing cap by removing Retaining Ring (piece #53-3). Be careful
not to lose Handwheel Pinion Spring (piece #47) and Spring Ring (piece #49).
19. Remove Handwheel shaft: tap on the motor end of the shaft to free Ball Bearing (piece #52-1) from
housing. Handwheel shaft will break free from Ball Bearing (piece #52-6). Remove handwheel shaft
from housing.
20. Withdraw handwheel shaft from handwheel end of housing.
21. To disassemble worm assembly further (removed in Step No. 10), remove Elastic Stop Nut
(piece #16-7), noting the number of turns to remove.
22. Remove Thrust Washers (piece #16-2), Limit Sleeve (piece #16-5), and Belleville Disc Springs
(piece #16-3 and #16-4). Note the orientation of the discs for reassembly later.
23. Remove Retaining Ring (piece #53-4).
24. The Bearing Cartridge (piece #16-1) and Worm Subassembly (piece #30-1) can now be withdrawn.
25. Remove the Ball Bearing (piece #52-7), locate setscrew in bearing locknut and remove setscrew
and Locknut (piece #44-1).
8.1.3 Reassembling Actuator Sizes L120-190, -420 and -800
1. Follow the disassembly instruction for Actuator Sizes 190, 420, and 800 in the reverse order and
follow the gasketing instructions below.
2. Stack Belleville disc, thrust washers, and spacers that were removed in the exact order as they were
removed.
3. Re-install Elastic Stop Nut (piece #16-7) with the same number of turns used to remove.
4. For the Worm Shaft Clutch (piece #33), install the clutch with smaller set of lugs first to engage with
lugs on Handwheel Clutch Pinion (piece #20).