Flowserve V Series User Manual

Page 8

Limitorque

V Series FCD LMENIM3601-01-AQ - 02/15

2.6.1 Installing a Gearbox with a Threaded Stem Nut – V0 through

V9 and V35H through V9H

1. Position the gearbox above the valve stem.

2. Rotate the gearbox handwheel or wrench nut several turns until there is positive engagement between the valve stem and the

gearbox Stem Nut.

3. Rotate the handwheel to lower the gearbox onto the valve until contact has been made with the valve flange.

4. Bolt the gearbox securely to the valve mounting flange.

2.6.2 Installing a Gearbox with a Blank Stem Nut – V0 through V9

1. Remove the two threaded Lock Nuts (pc# 7) from the Drive Sleeve (pc# 6), accessed through the top of the Housing (pc# 1).

2. Remove the Stem Nut (pc# 5) from the Drive Sleeve (pc# 6) through the top of the Housing (pc# 1).

3. Machine the Stem Nut (pc# 5) to suit the valve stem.

CAUTION: Care must be taken to ensure that the clamping devices used during machining do not damage splined surfaces of the Stem Nut.

4. Reinstall the Stem Nut (pc# 5) into the Drive Sleeve (pc# 6), ensuring the splines are properly engaged.

5. Reinstall the two threaded Lock Nuts (pc# 7) into the Drive Sleeve (pc# 6).

6. Mount the gearbox on the valve as detailed in Section 2.6.1 Installing a Gearbox with a Threaded Stem Nut.

2.6.3 Installing a Gearbox with a Blank Stem Nut – V35H through V9H

1. Place the gearbox upside down to access the mounting base.

2. Remove the Socket Head Cap Screws (pc# 34) which mount the Thrust Base (pc# 31) to the Thrust Housing (pc# 2).

3. Remove the Thrust Base (pc# 31) and Gasket (pc# 32) from the Thrust Housing (pc# 2).

CAUTION: Care must be taken to ensure that the O-ring (pc# 15) located in the Thrust Base (pc# 31) is not damaged during disassembly.

4. Remove the Stem Nut (pc# 5) and lower Thrust Roller Bearing (pc# 33).

5. Remove the upper Thrust Roller Bearing (pc# 33). Place all bearings in a clean, dry area until reassembly.

6. Machine the Stem Nut (pc# 5) to suit the valve stem.

CAUTION: Care must be taken to ensure that the clamping devices used during machining do not damage splined surfaces of the

Stem Nut (pc# 5).

7. Reinstall the upper Thrust Roller Bearing (pc# 33) into the Thrust Housing (pc# 2).

8. Install the Stem Nut (pc# 5) into the Thrust Housing (pc# 2) and upper Thrust Roller Bearing (pc# 33).

9. Install the lower Thrust Roller Bearing (pc# 33) onto the Stem Nut (pc# 5).

10. Place the Gasket (pc# 32) onto the Thrust Housing (pc# 2).

11. Separately, install the O-Ring (pc# 15) in the Thrust Base (pc# 31).