Limitorque WG Series Installation, Operation, and Maintenance

Experience In Motion
USER INSTRUCTIONS
Installation
Operation
Maintenance
Limitorque®
WG Series
FCD LMENIM2101-02 – 1/15
MEAD O'BRIEN | WWW.MEADOBRIEN.COM | (800) 874-9655

Limitorque WG Series Worm Gear Operator FCD LMENIM2101-02 – 01/15
2
Contents
1 Introduction 4
1.1 Purpose 4
1.2 User Safety 4
2 Inspection, Installation and Mounting Procedures 5
2.1 Initial Inspection and Storage Instructions 6
2.2 Inspection and Recording 6
2.3 Storage Procedure 6
2.4 General Mounting Instructions 7
2.5 Assembly Positions 8
2.6 Setting Position Limit Stops - WG-00 Through 12 9
3 Lubrication 10
4 Disassembly and Reassembly Instructions 11
4.1 Safety Precautions 11
4.2 Safety Practices 12
4.3 WG-00 Through WG-35 12
4.4 WG-04 Through WG-12 16
4.5 Single Reduction Spur Gear Attachment (1S) 20
4.6 Double Reduction Spur Gear Attachment (1SD) 22
5 How to Order Parts 24
Figures
Figure 2.1 – Typical WG Exploded View 5
Figure 2.2 – Assembly Position A 8
Figure 2.3 – Assembly Position D 8
Figure 2.4 – Setting Position Limit Stops 9
Figure 4.1 – Splined Adapter Assembly 12
Figure 4.2 – WG-00 Through WG-35 Exploded View 13
Figure 4.3 – WG-00 Through WG-35 Assembly View 14
Figure 4.7 – WG-04 Through WG-12 Splined Adapter Assembly 16
Figure 4.8 – WG-04 Through WG-12 Exploded View 17
Figure 4.13 – WG-00 Through WG-12 Spur Gear Attachment (1S) Exploded View 21
Figure 4.14 – WG-00 Through WG-12 Spur Gear Attachment (1SD) Exploded View 23

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Tables
Table 3.1 – Lubricants 10
Table 4.1 – WG-00 Through WG-35 Parts List 15
Table 4.2 – WG-04 Through WG-12 Parts List 19
Table 4.3 – WG-00 Through WG-12 Spur Gear Attachment (1S) Parts List 21
Table 4.4 – WG-00 Through WG-12 Spur Gear Attachment (1SD) Parts List 23

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1 Introduction
1.1 Purpose
The installation and maintenance manual (IOM) explains how to install and maintain the Flowserve Limitorque WG
operator. Information on installation, disassembly, reassembly, lubrication and spare parts is provided.
1.2 User Safety
Safety notices in this manual detail precautions the user must take to reduce the risk of personal injury and damage
to the equipment. The user must read and be familiar with these instructions before attempting installation, operation
or maintenance. Failure to observe these precautions could result in serious bodily injury, damage to the equipment,
voiding of the warranty, or operational difficulty.
Safety notice is presented in this manual in three forms:
c WARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow warning notices
could result in personal injury or death.
a CAUTION: Directs the user’s attention to general precautions that, if not followed, could result in personal injury
and/or equipment damage.
NOTE: Highlights information critical to the user’s understanding of the operator’s installation and operation.

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Figure 2.1 – Typical WG Exploded View
c WARNING: Do not manually operate the WG operator with devices other than the installed handwheel or wrench
nut. Using additive force devices (cheater bars, wheel wrenches, pipe wrenches, or other devices of this nature)
on the operator handwheel, wrench or wrench nut may cause serious personal injury and/or damage to the
operator or valve.
2
Inspection,
Installation and
Mounting Procedures

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2.1 Initial Inspection and Storage Instructions
c WARNING: Read this installation and maintenance manual carefully and completely before attempting to
store the operator. If an electric actuator is attached to the WG manual operator, be aware of the electrical
hazards. Consult the electric actuator installation and maintenance manual for guidance.
2.2 Inspection and Recording
Upon receipt of the operator, inspect the condition of the equipment, and record nameplate information.
1. Carefully remove operator from shipping carton or skid. Thoroughly examine the equipment for any physical
damage that may have occurred during shipment. If damaged, immediately report the damage to the transport
company.
2. A nameplate is attached to each operator with the following information:
• Operator size
• Assembly position
• Order number
• Serial number
• Customer tagging
Record this information for future reference, e.g., ordering parts, or obtaining further information.
2.3 Storage Procedure
NOTE: The following is the recommended storage procedure to retain maximum product integrity during storage.
Failure to comply with recommended procedure will void the warranty.
Storage (less than one year)
Store operators on wooden skids to protect the machined mounting flange. Place the wooden skids containing the
operators in a clean, dry, protected warehouse. If the operators must be stored outside, they must be covered in
polyethylene protection with silica gel crystals to absorb moisture. If an electric actuator is attached to the WG, refer
to the storage procedures in its respective manual for appropriate storage procedures. Rotate input shafts every three
months to mix the lubricant.

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2.4 General Mounting Instructions
a CAUTION: To avoid the potential for disengaging the worm gear segment, ensure that the pointer cap pointer is
oriented to the mid-point of the 90º valve travel. Full stroke rotation of the quadrant should not move the pointer
past the corresponding Open or Close ID marks on the housing cover.
The mounting instructions for the WG series worm gearboxes are outlined below. The WG-00 through WG-35 gearboxes
are designed with a bottom entry splined adapter. The WG-04 through WG-12 gearboxes are designed with a top entry
splined adapter. A separate set of instructions for each design is provided. See Section 2.4.1 for the WG-00 through WG-35
and Section 2.4.2 for the WG-04 through WG-12.
2.4.1 WG-00 through WG-35
1. Place the valve disk in the full closed position.
Note: If the Splined Adapter is already installed in the operator, go to step 6.
2. Remove the Pointer Cap (see Section 4 for removal instructions).
3. Turn the gearbox upside down so that the bottom of the housing is accessible.
4. Remove the Retaining Ring, and install the Splined Adapter.
Note: The notch in the Worm Gear at the Closed position must be aligned with the
keyway in the Splined Adapter.
5. Reinstall the Retaining Ring.
6. Place the gearbox in the upright position so that the top of the gearbox is accessible.
7. Mount the operator on the valve and bolt securely.
8. Rotate the input shaft to align the keyway of the Splined Adapter with the keyway of the
Valve Shaft and install the key.
9. Confirm that the gearbox Stop Screws are properly set for valve disk travel in both the Open and Close
directions of travel. See Section 2.6.
10. Reinstall the Pointer Cap.

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2.5 Assembly Positions
2.4.2 WG-04 through WG-12
2. Remove the Pointer Cap (see Section 4 for removal instructions).
Note: If the Splined Adapter is already installed in the operator, go to step 6.
3. Remove the Retaining Ring and install the Splined Adapter.
Note: The notch in the Worm Gear at the Closed position must be aligned with the keyway in the Splined Adapter.
4. Reinstall the Retaining Ring.
5. Mount the operator on the valve and bolt securely.
6. Rotate the input shaft to align the keyway of the Splined Adapter with the keyway of the Valve Shaft and install the key.
7. Confirm that the gearbox Stop Screws are properly set for valve disk travel in both the Open and Close directions of travel.
See Section 2.6.
8. Reinstall the Pointer Cap.
Figure 2.2 – Position A
Figure 2.3 – Position D
STANDARD ASSEMBLY POSITION
Clockwise Input Rotation –
Clockwise Output Rotation
OPTIONAL ASSEMBLY POSITION
Clockwise Input Rotation –
Counterclockwise Output Rotation

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2.6 Setting Position Limit Stops – WG-00 Through WG-12
Refer to Figure 2.4
1. Loosen the Hex Nut (pc# 16) and turn it several turns to allow for stop screw adjustment.
2. Adjust the Stop Screw by turning it counterclockwise to back the screw away from the Worm Gear/Drive Sleeve (pc# 5).
4. Turn the Stop Screw (pc# 15) in the clockwise direction until the end of the screw contacts the Worm Gear/Drive Sleeve.
5. Tighten the Hex Nut to secure the closed set position.
6. Move the valve disk to the full open position.
7. Follow steps 1 through 5.
a CAUTION: If the valve is operated with an electric actuator/gear operator combination, and the valve is position-seated,
set the actuator limit switches to trip prior to engagement of the WG Worm Gear/Drive Sleeve with the Stop Screws.
Damage to the operator could result from the Worm Gear/Drive Sleeve contacting the Stop Screw under motorized
operation.
Note: The stops are adjustable to +/- 5º of total travel to allow for proper positioning
of the worm gear quadrant.
Figure 2.4 – Setting Position Limit Stops – WG-00 through WG-12
21
2
20 8
17
17 10
9
3
7
19
22
11
1
11
22
6
5
32
23
16
15
4
31 18
14 29
12
9
30

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3 Lubrication
Flowserve Limitorque WG operators are shipped with the following lubricants:
Table 3.1 – Lubricants
Product Lubricant Soap Base Temperature Range
WG-00 through WG-10 Zenith LH 2 Calcium -40°C to 90°C (-40°F to 194°F)
NOTE: The lubricant should be checked every 18 months for manual operators.
a CAUTION: Do not add a different lubricant to a Flowserve Limitorque operator unless it is of the same soap base
as the existing lubricant, or you have received the approval of the lubricant manufacturer.
Quantity
Limitorque operators are built to operate on the partial immersion principle. The primary concern regarding the amount
of lubricant is whether the “worm” is totally immersed in grease. This can be verified by the use of one or more of the
“fill” and “drain” plugs provided on the operator housing in most sizes.
Quality
When removing a “fill” or “drain” plug to inspect the lubricant level, remove a small amount and ensure that it is clean
and free of any contaminant, including water. Should dirt, water or other foreign matter be found, the operators should
be flushed with a commercial degreaser/cleaner which is non-corrosive and does not affect seal materials such as
Buna-N or Viton. Repack operator with fresh lubricant.
Consistency
The main gear box lubricant should be slightly fluid, approximating a standard NLGI-2 grade consistency or less.
Alternate lubricants may be used in place of the standard lubricants supplied by Flowserve, provided they are of a
formulation similar to those listed above for the respective product.

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4 Disassembly and
Reassembly Instructions
4.1 Safety Precautions
c WARNING: Read this Installation, Operation and maintenance manual carefully and completely before attempting
to install, operate or troubleshoot the Limitorque operator.
c WARNING: Potential HIGH-PRESSURE vessel — be aware of high-pressure hazards associated with the attached
valve or other actuated device when installing or performing maintenance on the operator. Do not remove the
operator mounting bolts from the valve or actuated device unless the valve or device stem is secured or there is
no pressure in the line.
c WARNING: For maintenance and/or disassembly of the operator while installed on the valve, ensure that the
operator is not under thrust or torque load. If the valve must be left in service, the valve stem must be locked in
such a way as to prevent any movement of the valve stem.
c WARNING: Do not manually operate the operator with devices other than the installed handwheel. Using force
beyond the ratings of the operator and/or using additive force devices such as cheater bars, wheel wrenches, pipe
wrenches, or other devices on the operator handwheel may cause serious personal injury and/or damage to the
operator and valve.
c WARNING: Do not exceed any design limitations or make modifications to this equipment without first consulting
Limitorque.
c WARNING: Use of this product must be suspended any time it fails to operate properly.
a CAUTION: If a motor actuator is driving the manual operator, do not operate the valve under motor operation
without first checking and setting the limit switch and checking for correct motor rotation.
a CAUTION: Do not use replacement parts that are not genuine Flowserve Limitorque parts, as serious personal
injury and/or damage to the operator and valve may result.

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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.
4
28 13
2
21
20
9
5
9
6 22 11
1710
(VARIES)
Figure 4.1 – Splined Adapter Assembly

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6. Install the End Cap (pc# 6) and Gasket (pc# 22).
7. Insert the Worm Shaft (pc# 3) into the Housing bore.
8. Install the Tapered Roller Bearing (pc# 11) onto the Worm Shaft in the Housing bore.
9. Replace the Oil Seal (pc# 19) in the Input Flange (pc# 7), if required.
10. Install the Input Flange (pc# 7) with Gasket (pc# 22) or install the Spur Gear Attachment (See Section 4.5 or 4.6).
Note: Lubricate the worm gear mesh to replace lubricant lost during disassembly (see Lubrication, Section 3).
11. Place the upper Thrust Washer (pc# 9) on the Worm Gear/Drive Sleeve (pc# 5).
12. Replace the upper O-Ring (pc# 20) in the Housing Cover (pc# 2).
13. Install the Housing Cover (pc# 2) with Cover Gasket (pc# 21).
14. Replace the upper O-Ring (pc# 18) in the Housing Cover (pc# 2).
15. Replace the Pointer Cap O-ring (pc# 31) in the top of the Worm Gear/Drive Sleeve (pc# 5).
16. Install the Pointer Cap (pc# 8).
17. Turn the operator upside
down and insert the Splined
Adapter (pc# 4).
18. Install the Splined Adapter
Retaining Ring (pc# 10).
4
29 14
30 12
28 13
8
31
18
2
21
20 9
5
9
6
22
11
24 1
3
32
23
16
15
27
1328
11 22
19
7
17 17
10
(VARIES)
PC-7 IS REPLACED BY
OPTIONAL SPUR GEAR
ATTACHMENT, IF SUPPLIED
Figure 4.2 –
WG-00 through WG-35 Exploded View

14
21
2
20 8
17
17 10
9
3
7
31 18
14 29
12
9
30
17
17 10
9
3
7
19
22
11
1
11
22
6
5
32
23
16
15
4
Figure 4.3 – WG-00 through WG-35 Assembly View

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27
24
25
28 13
28 13
27
24
25
28 13
28 13
Parts List
Item Description Qty.
1 Housing 1
2 Housing Cover 1
3 Worm Shaft 1
4 Splined Adapter 1
5 Worm Gear/Drive Sleeve 1
6 End Cap 1
7 Input Flange VARIES
8 Pointer Cap 1
9 Thrust Washer 2
10 Splined Adapter Retaining Ring 1
11 Tapered Roller Bearing 2
12 Hex Head Cap Screw 8
15 Stop Screw 2
16 Hex Nut 2
17 Drive Sleeve O-Ring VARIES
18 Drive Sleeve O-Ring 1
19 Oil Seal 1
21 Cover Gasket 1
22 Gasket 2
23 Packing Seal 2
24 Pipe Plug/Grease Fitting 1
25 Eye Bolt 4
26 N/A
27 Key 1
28 Lock Washer 4
29 Lock Washer 4
30 Lock Washer 8
31 Pointer Cap O-Ring 1
32 Stop Screw O-Ring 2
Table 4.1 – WG-00 through WG-35 Parts List

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4.4 WG-04 Through WG-12
Refer to Figures 4.7 through 4.12
1. Remove the Hex Head Cap Screws (pc# 14), Pointer Cap (pc# 8), Gasket (pc# 31) and O-ring1
(pc# 18).
2. Remove Retaining Ring (pc# 10) and Splined Adapter (pc# 4).
3. Remove the Hex Head Cap Screws (pc# 12), Housing Cover (pc# 2), Cover Gasket (pc# 21), and O-Ring (pc# 20).
Note: Remove O-Ring (pc# 18) if applicable1
.
4. Remove the Input Flange (pc# 7) and Gasket (pc# 22), or remove the Spur Gear Attachment (See Section 4.5 or 4.6).
5. Remove Worm Shaft (pc# 3) with Tapered Roller Bearing (pc# 11) and Ball Bearing2
(pc# 26) from the Housing (pc# 1).
6. Remove the Tapered Roller Bearing (pc# 11) and Ball Bearing2
(pc# 26) from the Worm Shaft (pc# 3), if required.
7. Remove the End Cap (pc# 6) and Gasket (pc# 22).
8. Remove the Tapered Roller Bearing (pc# 11) and Ball Bearing2
(pc# 26).
9. Remove the Worm Gear/Drive Sleeve (pc# 5), O-Rings (pc# 17), and Thrust Washers (pc# 9).
10. Remove the Stop Screws (pc# 15) with Hex Nuts (pc# 16), Packing Seals (pc# 23) and O-rings (pc# 32), if applicable.
1. Install the Stop Screws (pc# 15), including the Hex Nuts (pc# 16),
Packing Seals (pc# 23) and O-rings (pc# 32), if applicable.
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).
4. Install the Worm Gear/Drive Sleeve (pc# 5).
5. Install the Ball Bearing2
(pc# 26) and the Tapered
Roller Bearing (pc# 11) into the Housing bore
on the End Cap side.
6. Install the End Cap (pc# 6) and Gasket (pc# 22).
7. Insert the Worm Shaft (pc# 3) into the Housing bore.
8. Install the Ball Bearing2
(pc# 26) and the Tapered
Roller Bearing (pc# 11) onto the Worm Shaft in the
Housing bore.
9. Replace the Oil Seal (pc# 19) in the Input Flange (pc# 7), if required.
10. Install the Input Flange (pc# 7) with Gasket (pc# 22) or
install the Spur Gear Attachment (See Section 4.5 or 4.6).
Note: Lubricate the worm gear mesh to replace lubricant lost during
disassembly (See Lubrication, Section 3).
14 29
1328
4
5
9
20
18
21
2
1230
8
31
10
(QTY VARIES
(VARIES)1
Figure 4.7 –
WG-04 through WG-12
Splined Adapter Assembly

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11. Place the upper Thrust Washer (pc# 9) on the Worm Gear/Drive Sleeve (pc# 5).
12. Replace the O-Rings (pc# 20) in the Housing Cover (pc# 2).
Note: Lubricate the O-Rings before installation.
13. Install the Housing Cover (pc# 2) with the Cover Gasket (pc# 21).
14. Insert the Splined Adapter (pc# 4) into the Worm Gear/Drive Sleeve (pc# 5).
15. Install the Splined Adapter Retaining Ring (pc# 10).
16. Install the Pointer Cap (pc# 8), Gasket (pc# 31) and Drive Sleeve O-Ring1
(pc# 18).
1
O-Ring (pc# 18) applies to WG-04 through -07 only. (Pc# 20), quantity of 2, applies to WG-75 through WG-12.
2
Ball Bearing (pc# 26) applies to WG-55 thru -12 only.
14 29
1328 6
22
11
26
24
1
23
16
15
3
27
26 11
22
19
7
13 28
4
1717
9
5
9
20
18
21
2
1230
25
24
8
31
10
(QTY VARIES)
(QTY VARIES)
(VARIES)
(VARIES)
(VARIES)1
PC-7 IS REPLACED BY
OPTIONAL SPUR GEAR
ATTACHMENT, IF SUPPLIED
Figure 4.8 – WG-04 through WG-12 Exploded View

18
21
17 17 4 9
3
7
19
22
11
1
26
11
22
6
11
26
32
16
23
5
15
4
23
2
20 20 31 8
14 29
10 9
12 30
WG-04 THRU WG-07
ALTERNATE CONSTRUCTION:
STOP SLEEVE O-RINGS
WG-04 THRU WG-07
SINGLE WORM SHAFT BEARING
WG-04 THRU WG-05
31
21
17 17 4 9
3
7
19
32
16
23
5
23
2
20 20 31 8
14 29
10 9
12 30
18
20
DRIVE SEAL O-RING GASKET
WG-04 THRU WG-07

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Table 4.2 – WG-04 through WG-12 Parts List
Parts List
1 Housing 1
2 Housing Cover 1
3 Worm Shaft 1
4 Splined Adapter 1
5 Worm Gear/Drive Sleeve 1
6 End Cap 1
7 Input Flange 1
8 Pointer Cap 1
9 Thrust Washer 2
10 Splined Adapter Retaining Ring 1
11 Tapered Roller Bearing 2
13 Hex Head Cap Screw VARIES
15 Stop Screw 2
16 Hex Nut 2
19 Oil Seal 1
21 Cover Gasket 1
22 Gasket 2
23 Packing Seal 2
24 Pipe Plug/Grease Fitting 2
25 Eye Bolt 4
26 Ball Bearing VARIES
27 Key 1
28 Lock Washer VARIES
29 Lock Washer 4
30 Lock Washer 8
31 Pointer Cap Gasket 1
32 Stop Screw O-Ring VARIES
25
27
24
1328
1328
24
T
25
27
24
1328
1328
24

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4.5 Single Reduction Spur Gear Attachment (1S)
Refer to Figure 4.13
1. Remove the Socket Head Cap Screws and Input Flange (not shown) from the Cover (pc# 4).
2. Remove the Hex Head Cap Screws (pc# 12) and Cover (pc# 4).
3. Remove all traces of the Cover Gasket (pc# 9).
4. Remove the Input Shaft/Pinion (pc# 3) and Ball Bearings (pc# 6) from the Cover (pc# 4).
5. Remove the Ball Bearing (pc# 10) and Retaining Ring (pc# 5) from the Worm Shaft.
6. Remove Gear (pc# 2) and Key (pc# 8) from the Worm Shaft.
7. Remove the Socket Head Cap Screws (not shown) which mount the Spur Gear Attachment to the
WG Gearbox and remove the Spur Gear Housing (pc# 1)
8. If disassembly of the WG Gearbox is required, see Sections 4.3 or 4.4.
1. Install the Spur Gear Housing (pc# 1) on the WG Gearbox, ensuring proper gasket is installed between
Gearbox and Spur Gear Housing (see Section 4.3 or 4.5).
2. Install Gear (pc# 2) onto the WG Gearbox Worm Shaft with Key (pc# 8). Fasten with Retaining Ring (pc# 5).
3. Install Ball Bearing (pc# 10) onto the Worm Shaft.
4. Install Ball Bearing (pc# 6) into the Spur Gear Housing (pc# 1).
5. Install the Input Shaft/Pinion (pc# 3).
6. Install Ball Bearing (pc# 6) onto the Input Shaft/Pinion (pc# 3).
7. Replace the Cover Gasket (pc# 9).
8. Replace the Oil Seal (pc# 11) in the Cover (pc# 4).
Note: Lubricate the Spur Gearing. See Section 3.
9. Install the Cover (pc# 4), mounting with Hex Head Cap Screws (pc# 12).
10. Install the Input Flange (not shown) onto the Cover (pc# 4) using Socket Head Cap Screws (not shown).
Note: Replace any worn or damaged O-Rings or Gaskets to ensure proper sealing and operation.

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Parts List
1 Housing 1
2 Gear 1
3 Input Shaft/Pinion 1
4 Cover 11
5 Retaining Ring 1
6 Ball Bearing 2
7 Key 1
8 Key 1
9 Gasket 1
10 Ball Bearing 1
11 Oil Seal 1
13 Lockwasher 8
WORM SHAFT
1
9
4
12 13
11
6
3
6
8 2
5
10
Table 4.3 – WG-00 through WG-12 Spur Gear
Attachment (1S) Parts List
Figure 4.13 – WG-00 through WG-12 Spur Gear Attachment (1S) Exploded View

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4.6 Double Reduction Spur Gear Attachment (1SD)
Refer to Figure 4.14
1. Remove the Socket Head Cap Screws (pc# 19) and Input Flange (pc# 18) from the Cover (pc# 12).
2. Remove the Hex Head Cap Screws (pc# 14) and Cover (pc# 12).
3. Remove the Helical Gear/2nd
Set Pinion Subassembly.
4. Remove all traces of the Cover Gasket (pc# 13).
5. Remove the Input Shaft/Pinion Subassembly from the Cover (pc #12) by removing the Retaining Ring (pc# 16).
6. Remove the Retaining Ring (pc# 4) and Ball Bearings (pc# 11) from the Input Shaft/Pinion (pc #9).
7. Remove the Ball Bearing (pc# 8) from the 2nd
Set Pinion (pc# 5).
8. Remove the Retaining Ring (pc# 4) and the Helical Gear (pc# 2) from the 2nd
Set Pinion (pc# 5).
9. Remove the Retaining Ring (pc# 4) and the Helical Gear (pc# 2) from the Worm Shaft.
10. Remove the Socket Head Cap Screws (pc# 20) from the Spur Gear Housing (pc# 1) and remove the
Spur Gear Housing (pc# 1) from the WG Gearbox.
11. If disassembly of the WG Gearbox is required, see Sections 4.3 or 4.4.
1. Install the Spur Gear Housing (pc# 1) on the WG Gearbox, ensuring proper gasket is installed between Gearbox
and Spur Gear Housing (See Section 4.3 or 4.4).
2. Install the Helical Gear (pc# 2) on the WG Gearbox Worm Shaft with two Keys (pc# 3). Fasten with Retaining
Ring (pc# 4).
3. Insert the Bushing (pc# 10) into the end of the Input Shaft/Pinion (pc# 9).
4. Install the Ball Bearings (pc# 11) and Retaining Ring onto the Input Shaft/Pinion (pc# 9)
5. Install the Input Shaft/Pinion with Ball Bearings (pc# 11) into the Cover (pc# 12) using Retaining Ring (pc# 16).
6. Install the Ball Bearing (pc# 6) in the Spur Gear Housing (pc# 1).
7. Assemble the Helical Gear (pc# 2) on the 2nd
Set Pinion (pc# 5) with two Keys (pc# 7). Fasten with Retaining
Ring (pc# 4).
8. Install the Ball Bearing (pc# 8) on the 2nd
Set Pinion (pc# 5).
9. Install the Helical Gear/2nd Set Pinion Subassembly in
the Ball Bearing (pc# 6).
Note: Lubricate the Spur Gearing. See Section 3.
10. Replace the Gasket Cover (pc# 13).
11. Install the Cover (pc# 12) with Input Shaft/Pinion Subassembly onto the Spur Gear Housing, ensuring proper mesh of
gear teeth on Input Shaft/Pinion (pc# 9) and Helical Gear (pc# 2), and alignment of Ball Bearing (pc# 8) with Cover (pc# 12).

23
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12. Replace the Oil Seal (pc# 15).
13. Install the Input Flange (pc# 18).
Note: Replace any worn or damaged O-Rings or Gaskets to
ensure proper sealing and operation.
WORM
SHAFT
INPUT SHAFT/PINION
SUBASSEMBLY
HELICAL GEAR/2ND
SET PINION
SUBASSEMBLY
B
A
3
1
6
4
12
2
5
8
1
1
6
5
7
7
2
4
8
2
4
4
11
9
11
13
12
14 17
15
18
19
10
16
21
20 A
B
Parts List
Item Description Qty. Item Description Qty.
1 Spur Gear Housing 1 11 Ball Bearing 2
2 Helical Gear 2 12 Cover 1
3 Key 2 13 Gasket - Cover 1
4 Retaining Ring 3 14 Hex Head Cap Screw 8
5 2nd Set Pinion 1 15 Oil Seal 1
6 Ball Bearing 1 16 Retaining Ring 1
7 Key 2 17 Lockwasher 8
8 Ball Bearing 1 18 Input Flange 1
9 Input Shaft / Pinion 1 19 Socket Head Cap Screw 4
10 Bushing 1 20 Socket Head Cap Screw VARIES
Table 4.4 – WG-00 through WG-12 Spur Gear Attachment (1SD) Parts List
Figure 4.14 – WG-00 through WG-12 Spur Gear
Attachment (1SD) Exploded View

flowserve.com
Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform its intended
function safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications under a
wide variety of industrial service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings for all possible applications.
The purchaser/user must therefore assume the ultimate responsibility for the proper sizing and selection, installation, operation and maintenance of Flowserve products. The purchaser/
user should read and understand the Installation Operation Maintenance (IOM) instructions included with the product, and train its employees and contractors in the safe use of Flowserve
products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative purposes only and should not be considered certified or as
a guarantee of satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect to this
product. Because Flowserve is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice.
Should any question arise concerning these provisions, the purchaser/user should contact Flowserve Corporation at any one of its worldwide operations or offices.
© 2015 Flowserve Corporation, Irving, Texas, USA. Flowserve is a registered trademark of Flowserve Corporation.
Flowserve Corporation
Flow Control
United States
Flowserve Limitorque
5114 Woodall Road
P.O. Box 11318
Lynchburg, VA 24506-1318
Phone: 434-528-4400
Fax: 434-845-9736
England
Euro House
Abex Road
Newbury
Berkshire, RG14 5EY
United Kingdom
Phone: 44-1-635-46999
Fax: 44-1-635-36034
Singapore
Limitorque Asia, Pte., Ltd.
12, Tuas Avenue 20
Singapore 638824
Phone: 65-6868-4628
Fax: 65-6862-4940
China
Limitorque Beijing, Pte., Ltd.
RM A1/A2
22/F, East Area, Hanwei Plaza
No. 7 Guanghua Road, Chaoyang
District
Beijing 100004, Peoples Republic of
China
Phone: 86-10-5921-0606
Fax: 86-10-6561-2702
India
Plot No. #4, 1 A, Road No. 8, EPIP
Whitefield, Bangalore – 560066
Karnataka
India
Phone: 91-80-40146200
Fax: 91-80-28410286
Italy
Fluid Power Systems
Via Rio Vallone 17
20883 Mezzago MB
Italy
Phone: 39-039-620601
Fax: 39-039-62060 213
Mead O’Brien, Inc.
10800 Midwest Industrial Blvd
St. Louis, Missouri 63132
(800) 874-9655
www.meadobrien.com
FCD LMENIM2101-02-AQ Printed in USA. January 2015

Limitorque WG Series Installation, Operation, and Maintenance

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Limitorque WG Series Installation, Operation, and Maintenance