Flowserve LY Series Limitorque - Manual (Page 47)

47
Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11
flowserve.com
3. Disconnect all electrical leads from the Torque Switch (piece #8) and Limit Switch (piece #7). Make
sure all wire leads are properly marked for reassembly.
4. Remove all external wires to the Terminal Strips (pieces #9 and 110).
5. If unit has an Integral Assembly, remove all wires from the Integral Assembly to the Terminal Strip
(pieces #9 and 110).
6. Remove Screws/Lockwashers (pieces #77, 78, 79, and 80) that are holding the Limit Switch (piece
#7) and Heater Assembly (piece #120). Remove the Limit Switch and Heater Assembly.
7. Remove two Screws (piece #97) and two Lockwashers (piece #98) that are holding the Torque
Switch (piece #8). Remove the Torque Switch.
8. Remove two Screws (piece #65) and two Lockwashers (piece #66) to remove the Top Plate
(piece #2).
9. Lift Top Plate (piece #2) off the LY Housing (piece #1). The Motor (piece #6) can be left attached to
the Top Plate when the Top Plate is removed.
Remove Input Worm Motor Pinion Assembly
10. Remove Input Worm Motor Pinion Assembly (pieces #52, 156, 53, 124, and 31).
Remove Worm Shaft Assembly
11. Remove four Screws (piece #61) and four Lockwashers (piece #62) to remove Disc Spring Cap
(piece #5).
12. Remove Disc Spring Cap (piece #5) and O-Ring (piece #135).
13. Rotate Worm Shaft Assembly CCW. The Worm Shaft Assembly should travel out of the Housing.
Once it has reached the end-of-travel, pull the remaining Worm Shaft Assembly out; Clutch Sleeve
(piece #13) will slip off the Worm Shaft Assembly. In the event that the Worm is stripped, the Worm
Shaft Assembly will need to be completely replaced.
NOTE: If Light Spring Pack or Heavy Spring Pack replacement is necessary, contact your Limitorque
authorized dealer or the Limitorque Service Department for a complete Worm Shaft Assembly
replacement.
Remove Handwheel Assembly
14. Remove the Handwheel Clutch (piece #16), Compression Spring (piece #154), Clutch Sleeve
(piece #13), Thrust Washer (piece #26 [two pieces]), and Thrust Bearing (piece #27).
15. Remove two Screws (piece #63) and two Lockwashers (piece #64) from the Handwheel Cap
(piece #34).
16. Remove the Handwheel Assembly as one piece, (piece #41, 112, 34, 137, 134, 155 [two pieces],
154, 70, and 37).
Remove Drive Sleeve
17. Remove O-Ring (piece #129) and Bearing (piece #33) from the top of the Drive Sleeve (piece #10).
18. Remove the Drive Sleeve (piece #10).