Limitorque LY Series - 5.8.3 Setting the OPEN Mechanical Stop on the LY 1001; 5.8.4 Setting the OPEN Mechanical Stop on the LY 2001;3001

5-12 LY Installation and Maintenance for LY 1001, LY 2001 and LY 3001 LMAIM1501
5.8.3 Setting the OPEN Mechanical Stop on the LY 1001
Piece numbers refer to Figure 5.10.
1. With the valve in the full OPEN position, set OPEN Mechanical Stop Set Screw
(piece #58) by removing the Set Screw (piece #59). (See Figure 5.9 for orientation.)
2. Using the Handwheel, turn the valve to the OPEN position. Verify the valve is fully open before setting the
Mechanical Stop Set Screw.
3. Rotate Mechanical Stop Set Screw (piece #58) in the CW direction until contact with the Torque Nut (piece
#32) occurs.
4. Back-off Mechanical Stop Set Screw (CCW direction) approximately 1¹₂ turns.
5. Reinstall Set Screw (piece #59).
6. Manually operate the actuator through the open limit to assure setting is correct.
5.8.4 Setting the OPEN Mechanical Stop on the LY 2001/3001
Piece numbers refer to Figure 5.11.
1. With the valve in the full OPEN position, set OPEN Mechanical Stop Screws (piece #58) (Hex Head Cap Screw)
by loosening Locking Nut (piece #59) (Hex Head Nut). (See Figure 5.10 for orientation.)
2. Using the Handwheel, turn the valve to the OPEN position. Make sure the valve is fully open before setting the
Mechanical Stop.
3. Rotate Mechanical Stop Screw (piece #58) in the CW direction until contact with the Stop Pin (piece #28)
occurs.
4. Back-off Mechanical Stop Screw (CCW direction) approximately 1¹₂ turns.
5. Retighten Locking Nut.
6. Manually operate the actuator through the open limit to assure setting is correct.
NOTE: The Mechanical Stops are intended to protect the equipment from overtravel if a Limit Switch fails. The
valve should not torque-out against the Mechanical Stop Screw during normal OPEN/CLOSE cycles.
5.9 Setting the MDPI (Mechanical Dial Position Indicator)
Piece numbers refer to Figure 5.12.
1. After setting the Limit Switch and Mechanical Stop Settings, manually position the valve in the fully CLOSED
position.
2. Loosen Screw (piece #147) on MDPI.
3. Make sure the MDPI Dial Plate (piece #146) is aligned properly with the Dial Window Retaining Plate Arrow
(piece #108), usually 0% (CLOSED) should align with the arrow. (See Figure 5.12.)
NOTE: If your application uses CW handwheel rotation to OPEN, flip the MDPI Plate over to properly orient the
OPEN and CLOSED position on the MDPI Plate.
4. Retighten the Screw (piece #147) on the MDPI Dial Plate (piece #146).
Flow Control Division
Limitorque Actuation Systems