Flowserve PT Series Limitorque - Manual (Page 25)

25
Limitorque PT Series Worm Gear Operator FCD LMENIM2001-00 – 01/10
flowserve.com
4.6 PT65, 120 and 150
Refer to Figures 4.8, 4.9, 4.10, 4.11 and Table 4.4.
1. Remove the Pointer Cap (pc# 14) and Gasket (pc# 15).
2. Turn the operator upside down and remove the Base (pc# 4).
3. Rotate the Base slightly to lift it from the Housing (pc# 1). Use jack-bolt holes if necessary.
4. Remove the Open End Cap (pc# 5) and Oil Seal (pc# 19) over the Worm Shaft (pc# 3).
5. Rotate the Worm Shaft until the Worm is disengaged from the one-piece Drive Sleeve/Worm Gear (pc# 2).
6. Remove the Closed End Cap (pc# 6) and Gasket (pc# 23).
7. Remove the Worm Shaft assembly from the Housing.
8. Remove the one-piece Drive Sleeve/Worm Gear from the Housing.
9. Remove worm shaft Tapered Roller Bearings (pc# 18) from the Worm Shaft assembly if required.
Reassembly Instructions:
1. Install the one-piece Drive Sleeve/Worm Gear (pc# 2) into the Housing.
2. Install the Worm Shaft assembly (pc# 3) into the Housing (pc# 1).
3. Install the Closed End Cap (pc# 6) and End Cap Gasket (pc# 23) with the tapered roller bearing cup inserted in the
End Cap.
4. Rotate the Worm Shaft (pc# 3) to re-engage the Worm with the Drive Sleeve/Worm Gear (pc# 2).
5. Install the Oil Seal (pc# 19) and the Open End Cap (pc# 5) with the tapered roller bearing cup inserted into the End
Cap.
note: The Oil Seal must be properly lubricated.
note: A series of gaskets are supplied in order to properly shim the Open End Cap (pc# 5). Start the assembly with
three (3) gaskets under the Open End Cap and install onto the Housing (pc# 1). Once installed, push/pull the
Worm Shaft (pc# 3) along its axis. If there is any movement, remove the Open End Cap and remove one gasket.
Reinstall and check the Worm Shaft movement again. No axial movement is allowed.
6. Install the Open End Cap.
7. Position the center of the Drive Sleeve/Worm Gear at approximately 45 degrees on the Worm Shaft.
8. Re-lubricate the housing to replace lubricant lost during disassembly.
9. Install the Base (pc# 4), ensuring that both O-Rings (pc# 12) have been replaced. Lubricate the O-Rings for easier
installation.
10. Tighten the Base socket head cap screws.
11. Return the operator to the upright position and install the Pointer Cap (pc# 14) and Pointer Cap Gasket (pc# 15).
12. Check for proper operation by stroking the operator through a complete open-close cycle.