Flowserve LY Series Limitorque - Manual (Page 37)

37
Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11
flowserve.com
6.4 Manual Operation
c WARNING: Do not manually operate actuator with devices other than installed Handwheel and
Declutch Lever. Using additive force devices (cheater bars, wheel wrenches, pipe wrenches, or
other devices of this nature) on the actuator handwheel or declutch lever may cause serious
personal injury and/or damage to the actuator or valve.
Piece numbers refer to Figures 6.5, 6.6, and 6.7 for LY 1001 and Figure 6.8, 6.9, 6.10, and 6.11 for LY
2001/3001.
The LY actuator has a Handwheel for manual operation. The unit can be manually operated any time the
motor is not energized.
1. To manually operate the actuator, push the Declutch Lever (piece #45) clockwise approximately 20°
until it latches.
2. If the Declutch Lever will not turn 20° or it does not latch, DO NOT FORCE. Rotate the Handwheel
(piece #41) slightly (in either direction) while continuing to push the Declutch Lever in the clockwise
direction; the Declutch Lever will latch in place. When the Declutch Lever is latched in place, the
Clutch (piece #13) is moved until its lugs engage with the lugs on the Handwheel Clutch (piece
#16). This position is maintained indefinitely by the Declutch Fork Assembly (piece #46). When the
motor is energized, a flat on the Input Worm Gear (piece #18) releases the Declutch Fork Assembly,
pushing the Clutch into motor operation by the Declutch Return Spring (piece #47).
6.5 Motor Operation
a CAUTION: Do not force the Declutch Lever into motor operation. Lever will automatically return
to motor operation when the motor is energized.
Piece numbers refer to Figures 6.5, 6.6, and 6.7 for LY 1001, and Figures 6.8, 6.9, 6.10, and 6.11 for LY
2001/3001.
The Motor Pinion Gear (piece #54) turns the Worm Shaft Pinion Gear (piece #53), which is part of the
Input Worm Shaft (piece #31). The Input Worm Shaft drives the Input Worm Gear (piece #18) that is
lugged to the Clutch Sleeve (piece #13). The Input Worm Gear drives the Worm Shaft Assembly through
the lugs and splines on the Clutch Sleeve. The Output Worm (piece #15) on the Worm Shaft Assembly
turns the Drive Sleeve (piece #10). The Drive Sleeve accepts the Torque Nut (piece #32) that is bored
and keyed to fit and turn the particular valve stem.