2 safety practices – Flowserve WG Series Limitorque User Manual

Page 12

Limitorque WG Series Worm Gear Operator FCD LMENIM2101-02 – 01/15

4.2 Safety Practices

The following checkpoints should be performed to maintain safe operation of the WG gear operator:

• Set up a periodic operating schedule on infrequently used valves.

• Ensure that the limit and/or torque switches on any electric actuator fitted to the WG worm gear operator are

correctly and appropriately adjusted.

4.3 WG-00 Through WG-35

Refer to Figures 4.1 through 4.6.

Disassembly Instructions:

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

2. Remove Retaining Ring (pc# 10) and Splined Adapter (pc# 4).

3. Return the operator to the upright position (mounting base down) and remove the Hex Head

Cap Screws (pc# 14), Pointer Cap (pc# 8) and O-rings (pc# 18 & 31).

4. Remove the Hex Head Cap Screws (pc# 12), Housing Cover (pc# 2) and Cover Gasket (pc# 21).

5. Remove the Input Flange (pc# 7), with Oil Seal (pc# 19) and Gasket (pc# 22), or remove the Spur Gear

Attachment (See Section 4.5 or 4.6).

6. Remove Worm Shaft (pc# 3) with Tapered Roller Bearing (pc# 11) from the Housing (pc# 1).

7. Remove the Tapered Roller Bearing (pc# 11) from the Worm Shaft (pc# 3), if required.

8. Remove the End Cap (pc# 6) and Gasket (pc# 22).

9. Remove the Tapered Roller Bearing (pc# 11).

10. Remove the Worm Gear/Drive Sleeve (pc# 5), O-Rings (pc# 17), and Thrust Washers (pc# 9).

11. Remove the Stop Screws (pc# 15) with Hex Nuts (pc# 16), Packing Seals (pc# 23) and O-rings (pc# 32).

Reassembly Instructions:

1. Install the Stop Screws (pc#15), including the O-Rings (pc# 32),

Packing Seals (pc# 23) and Hex Nuts (pc# 16).

2. Place the lower Thrust Washer (pc# 9) in the Housing (pc# 1).

3. Replace the lower O-Rings (pc# 17) in the base of the

Housing (pc# 1).

Note: Lubricate all O-Rings before installation

4. Install the Worm Gear/Drive Sleeve (pc# 5).

5. Install the Tapered Roller Bearing (pc# 11) into the

Housing bore on the End Cap side.

(VARIES)

PC-7 IS REPLACED BY

OPTIONAL SPUR GEAR

ATT

ACHMENT

, IF SUPPLIED

Figure 4.1 – Splined Adapter Assembly