Flowserve SMB User Manual

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USER INSTRUCTIONS

Limitorque

FCD LMENIM1401-04-AQ – 1/15

SMB Series/SB Series

Installation

Operation

Maintenance

Experience In Motion

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Contents

1 Introduction 6 2 Product Capabilities and Features 7 3 Actuator Weights 10 4 Installation Instructions 11

4.1 Safety Precautions 11

4.2 Safety Practices 12

4.3 Actuator Preparation 12

4.3.1 Mounting Base 13

4.3.2 Stem Acceptance 13

4.3.3 Terminal Connections 14

4.4 Setting The Limit Switch 14

4.4.1 Two-Train Geared Limit Switch 15

4.4.2 Four-Train Geared Limit Switch 18

4.5 Setting Torque Switch 20

4.5.1 SMB-000 “Cam Style” Double Torque Switch 20

4.5.2 SMB-000 and SMB-00 “C Style” Double Torque Switch 23

4.5.3 SMB-0 through SMB-5 Double Torque Switch 25

4.6 Position Indication 27

4.6.1 Local Position Indicator 27

4.6.2 Remote Position Indicator (50 ohm or 1000 ohm Potentiometer) 27

4.6.3 Remote Position Indicator (Resistance-to-Current Signal Converter) 28

4.7 Additional Electrical Components 30

4.7.1 Reversing Starter 30

4.7.2 Overload Relays 30

4.7.3 Control Station 31

5 Operation 32

5.1 Motor Operation 32

5.2 Manual Operation 33

5.2.1 SMB-000 and SMB-00 33

5.2.2 SMB-0 through SMB-4 34

5.2.3 SMB-5 through SMB-5T 34

6 Maintenance 35

6.1 Routine Maintenance 35

6.2 Major Maintenance 36

6.3 Lubrication 36

6.3.1 Lubrication Inspection 36

6.3.2 Standard Lubricant 37

6.3.3 Minimum Lubricant Qualities Required 38

7 SMB Disassembly and Reassembly 39

7.1 SMB-000 39

7.1.1 To Replace the Stem Nut Only 39

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

7.1.2 SMB-000 Disassembly 40

7.1.3 SMB-000 Reassembly 41

7.1.4 Gasket Instructions 41

7.2 SMB-00 46

7.2.1 To Replace the Stem Nut Only 46

7.2.2 SMB-00 Disassembly 47

7.2.3 SMB-00 Reassembly 48

7.2.4 Gasket Instructions 49

7.3 SMB-0, 1, 2, 3 and 4 57

7.3.1 To Replace the Stem Nut Only 57

7.3.2 SMB-0, 1, 2, 3 and 4 Disassembly 58

7.3.3 Worm and Torque Spring Disassembly 59

7.3.4 SMB-0, 1, 2, 3 and 4 Reassembly 60

7.3.5 Gasket Instructions 60

7.4 SMB-5 (Thrust and Torque) and SMB-5T (Torque Only) 67

7.4.1 SMB-5 and SMB-5T Disassembly 67

7.4.2 SMB-5 and SMB-5T Reassembly 70

8 SB Disassembly and Reassembly 80

8.1 SB-00 80

8.1.1 SB-00 Disassembly/Stem Nut Removal 80

8.1.2 SB-00 Reassembly/Stem Nut Installation 81

8.2 SB-0 84

8.2.1 SB-0 Disassembly/Stem Nut Removal 84

8.2.2 SB-0 Reassembly/Stem Nut Installation 85

8.3 SB-1 88

8.3.1 SB-1 Disassembly/Stem Nut Removal 88

8.3.2 SB-1 Reassembly/Stem Nut Installation 88

8.4 SB-2 91

8.4.1 SB-2 Disassembly/Stem Nut Removal 91

8.4.2 SB-2 Reassembly/Stem Nut Installation 92

8.5 SB-3 95

8.5.1 SB-3 Disassembly/Stem Nut Removal 95

8.5.2 SB-3 Reassembly/Stem Nut Installation 96

8.6 SB-4 99

8.6.1 SB-4 Disassembly/Stem Nut Removal 99

8.6.2 SB-4 Reassembly/Stem Nut Installation 99 9 Troubleshooting 103 10 How to Order Parts 104 11 EC Declaration of Conformity 105

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figures

Figure 2.1 – Typical SMB (0 through 4) 8 Figure 4.1 – Wiring Connections 14 Figure 4.2 – Two-Train Geared Limit Switch – Rotor-Type 16 Figure 4.3 – Four-Train Geared Limit Switch – Rotor Type 18 Figure 4.4 – SMB-000 “Cam Style” Double Torque Switch 21 Figure 4.5 – SMB-000 and SMB-00 “C Style” Double Torque Switch 23 Figure 4.6 – SMB-0 through SMB-5 Double Torque Switch 25 Figure 4.7 – Typical Connection for a 50-ohm Potentiometer 29 Figure 4.8 – Typical Connection for a 1000-ohm Potentiometer 29 Figure 4.9 – Typical Connection for R/I Signal Converter (Older Version) 29 Figure 4.10 – Typical Connection for PT20SD R/I Converter 30 Figure 4.11 – Typical Wiring Diagram – Built-in Reversing Starter and Control Station for a

Three-Phase Power Supply 31 Figure 7.1 – SMB-000 Parts Diagram – Side View 42 Figure 7.2 – SMB-000 Parts Diagram – Top View 43 Figure 7.3 – SMB-000 Exploded View 44 Figure 7.4 – SMB-00 Parts Diagram – Motor End View 50 Figure 7.5 – SMB-00 Parts Diagram – Top View 51 Figure 7.6 – SMB-00 Parts Diagram – Side View 52 Figure 7.7 – SMB-00 Parts Diagram – Side Mounted Handwheel Detail 53 Figure 7.8 – SMB-00 Exploded View 54 Figure 7.9 – SMB-0 through SMB-4 Parts Diagram – Top View 61 Figure 7.10 – SMB-0 through SMB-4 Parts Diagram – Worm Shaft Side View 62 Figure 7.11 – SMB-0 through SMB-4 Parts Diagram – Drive Sleeve Side View 63 Figure 7.12 – SMB-0 through SMB-4 Exploded View 64 Figure 7.13 – SMB-5 and 5T Parts Diagram 73 Figure 7.14 – SMB-5 and 5T Parts Diagram– Top View 74 Figure 7.15 – SMB-5 and 5T Parts Diagram – Declutch Housing Detail 75 Figure 7.16 – SMB-5 and 5T Exploded View 76 Figure 8.1 – SB-00 Parts Diagram 82 Figure 8.2 – SB-0 Parts Diagram 86 Figure 8.3 – SB-1 Parts Diagram 89 Figure 8.4 – SB-2 Parts Diagram 93 Figure 8.5 – SB-3 Parts Diagram 97 Figure 8.6 – SB-4 Parts Diagram 101

Tables

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 3.1 – Actuator Weights Table 4.1 – Mounting Base Dimensions 13 Table 4.2 – Maximum Stem Acceptance 13 Table 4.3– Terminal Connections 14 Table 4.4 – Two-Train Geared Limit Switch Parts List 17 Table 4.5 – Four-Train Geared Limit Switch Parts List 19 Table 4.6 – SMB-000 “Cam Style” Double Torque Switch Parts List 22 Table 4.7 – SMB-000 and SMB-00 “C Style” Torque Switch Parts list 24 Table 4.8 – SMB-0 through SMB-5 Double Torque Switch Parts List 26 Table 6.1 – Approximate Volume and Weights of Lubricants 37 Table 7.1 – SMB-000 Parts List 45-46 Table 7.2 – SMB-00 Parts List 55-57 Table 7.3 – SMB-0 through SMB-4 Parts List 65-67 Table 7.4 – SMB-5 and 5T Parts List 77-79 Table 8.1 – SB-00 Parts List 83-84 Table 8.2 – SB-0 Parts List 87 Table 8.3 – SB-1 Parts List 90 Table 8.4 – SB-2 Parts List 94 Table 8.5 – SB-3 Parts List 98 Table 8.6 – SB-4 Parts List 102 Table 10.1 – Space Heater Size per Voltage Rating 104

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Introduction

1.1 Purpose

This Installation and Maintenance Manual explains how to install and maintain SMB and SB actuators. Information on installation, operation, disassembly, 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, void of the warranty, or operational difﬁculty.

Safety notices are 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 actuator installation and operation.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Product Capabilities and Features

SMB and SB Series actuators easily operate all types of valves: gate, globe, plug, ball, and butterﬂy valves, and specialized valves and mechanisms.

The actuators meet rigid safety requirements. The housing is durable cast-iron or ductile iron, acceptable for use in the nuclear power industry as well as other industries.

The actuators are available with optional integral controls and other features.

The actuators have a removable stem nut that allows transferring of the actuator from one valve to another without major disassembly.

2.1 Initial Inspection and Storage Instructions

c WARNING: Read this Installation and Maintenance Manual carefully and completely before

attempting to install, operate, disassemble, or troubleshoot the actuator. Be aware of the electrical hazards.

2.2 Product Identiﬁcation

The actuator unit nameplate is located on the back of the unit opposite the limit switch compartment. The nameplate contains the following information:

• Point of Manufacture

• Unit Size

• Order Number

• Serial Number

• Customer Tagging

• CE Stamp

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

The motor nameplate is located on the motor. The nameplate contains the following information:

• ID Number

• Run Torque

• RPM

• Full Load Amps

• Insulation Class

• Horsepower

• Service Factor

• Hertz

• Ambient Temperature

• Start Torque

• Enclosure Type

• Volts

• Locked Rotor Amps

• Duty

• Phase

• Motor Code

• Connection Diagram

Figure 2.1 – Typical SMB (0 through 4)

Housing

Motor

Handwheel

Declutch lever

Switch compartment

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

2.3 Inspection and Recording

Upon receipt of the actuator:

1. Carefully remove the actuator from the 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 actuator. Record this information for future reference, i.e. ordering parts or obtaining further information.

2.4 Storage Procedure

NOTE: The following is our recommended storage procedure to retain maximum product integrity during storage. Failure to comply with recommended procedures will void the warranty. For longerterm storage, contact Limitorque for procedures and recommendations.

Storage (less than 1 year)

Actuators are not weatherproof until properly installed on the valve or prepared for storage.

Store actuators in a clean, dry, protected warehouse, away from excessive vibration and rapid temperature changes. If the actuators must be stored outside, they must be stored off the ground, high enough to prevent them from being immersed in water or buried by snow.

1. Position the actuator in storage with motor and switch compartment horizontal.

2. Connect the internal heaters (if supplied) or place desiccant in the switch compartment.

3. Replace all plastic caps or plugs with metal pipe plugs and ensure that all cover bolts are tight.

4. If the actuator is mounted on a valve and the stem protrudes from the actuator, a suitable stem cover must be provided.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Actuator Weights

The approximate weights of the SMB actuators and SB and SBD options are provided below:

Table 3.1 – Actuator Weights

Actuator

SMB-000 135 62 N/A N/A N/A N/A

SMB-00 200 90 65 30 100 46

SMB-0 350 159 180 83 210 97

SMB-1 460 209 200 92 325 150

SMB-2 580 263 220 101 345 159

SMB-3 1200 553 500 230 825 380

SMB-4 2020 916 795 366 1285 591

SMB-5&5T 3375 1531 N/A N/A N/A N/A

SMB-5XT 5875 2665 N/A N/A N/A N/A

Note 1: With the largest motor, no integral controls, and standard compartment cover.

Weight

lb. kg lb. kg lb. kg

Adder for SB Adder for SBD

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Installation Instructions

4.1 Safety Precautions

c WARNING: Read this Installation and Maintenance Manual carefully and completely before

attempting to install, operate, or troubleshoot the Limitorque actuator.

c WARNING: Be aware of electrical hazards. Turn off incoming power before working on the

actuator and before opening the switch compartment.

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 actuator. Do not remove the actuator 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 actuator while installed on the valve,

ensure that the actuator 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 attempt to remove the spring cartridge cap, housing cover, or stem nut

locknut from the actuator while the valve or actuated device is under load.

c WARNING: Do not manually operate the actuator with devices other than the installed handwheel

and declutch lever. Using force beyond the ratings of the actuator and/or using additive force devices such as cheater bars, wheel wrenches, pipe wrenches, or other devices on the actuator handwheel or declutch lever may cause serious personal injury and/or damage to the actuator and valve.

c WARNING: Do not exceed any design limitations or make modiﬁcations to this equipment

without ﬁrst consulting Limitorque.

c WARNING: Actuators equipped with electrical devices (motors, controls) requiring ﬁeld wiring

must be wired and checked for proper operation by a qualiﬁed tradesman.

c WARNING: Use of the product must be suspended any time it fails to operate properly.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

a CAUTION: Do not use oversized motor overload heaters. Instead, look for the cause of the

overload.

a CAUTION: Do not operate the valve under motor operation without ﬁrst setting or checking the

limit switch setting and motor direction.

a CAUTION: Do not force the declutch lever into the motor operation position. The lever returns to

this position automatically when the motor is energized.

a CAUTION: Do not depress the declutch lever during motor operation to stop valve travel.

a CAUTION: Do not use replacement parts that are not genuine Flowserve Limitorque parts, as

serious personal injury and/or damage to the actuator and valve may result.

a CAUTION: Do not lift actuator/gearbox or actuator/valve combinations with only the eye bolts in

the SMB actuator. These eye bolts are designed for lifting the SMB actuator only.

a CAUTION: Do not lift the actuator by the handwheel

4.2 Safety Practices

The following check points should be performed to maintain safe operation of the SMB or SB actuator:

• Eye bolts in SMB and SB actuators are designed for lifting only the actuator and not associated gearboxes or valves.

• Mount the actuator with the motor in a horizontal plane, if possible.

• Keep the switch compartment clean and dry.

• Keep the valve stem clean and lubricated.

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

• Verify all actuator wiring is in accordance with the applicable wiring diagram.

• Carefully check for correct motor rotation direction. If the valve closes when open button is pushed, the motor leads may have to be reversed.

• Verify the stem nut is secured tightly by the locknut and that the top thread of the locknut is crimped or staked in two places.

• Use a protective stem cover. Check valve stem travel and clearance before mounting covers on rising stem valves.

4.3 Actuator Preparation

Replace all molded plastic conduit and top protectors (installed for shipping purposes only) with metal pipe plugs when installation wiring is complete.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4.3.1 Mounting Base

Table 4.1 – Mounting Base Dimensions

Mounting Holes Tap Dimensions

Actuator Quantity Standard Optional

SMB-000 4

SMB-00 4

SMB-0 4 ¾-10 UNC x 1.00" deep M20-2.5 x 26 mm deep

SMB-1 8

SMB-2 8 ¾-10 UNC x 1.13" deep M20-2.5 x 29 mm deep

SMB-3 8

SMB-4 8 1¼-7 UNC x 2.00" deep M36-4 x 64 mm deep

SMB-5 12 1½-6 UNC x 3.00" deep N/A

SMB-5T 16 1-8 UNC x 2.00" deep N/A

SMB-5XT 16 Consult Factory N/A

⁄16-18 UNC x .63" deep N/A

⁄8-11 UNC x 1.13" deep M16-2 x 29 mm deep

⁄8-11 UNC x 1.00" deep M16-2 x 26 mm deep

⁄8-9 UNC x 1.75" deep M30-3.5 x 45 mm deep

4.3.2 Stem Acceptance

Table 4.2 – Maximum Stem Acceptance

Two-piece nut design (drive sleeve & stem nut) Max threaded Max bore & keyway

Actuator inch mm inch mm

SMB-000 1.375 35 1.125 w/ ¼ x

SMB-00 1.75 44 1.500 w/

SMB-0 2.375 60 1.875 w/ ½ x

SMB-1 2.875 73 2.438 w/

SMB-2 3.5 89 2.875 w/ ¾ x ¼ 73.0 w/ 20x6

SMB-3 5 127 4.250 w/ 1.0 x

SMB-4 5 127 4.500 w/ 1.0 x ½ 114.0 w/ 32x9

SMB-5 6.25 159 5.250 w/ 1¼ x

SMB-5T N/A N/A 6.000 w/1 ½ x ½ 152.0 w/ 40x11

SMB-5XT N/A N/A 10.000 w/ 1¼ x

SB-00 1.25 32

SB-0 2.375 60

SB-1 2.625 66

SB-2 3.50 89

SB-3 4.00 102

SB-4 5.00 127

⁄32 26.0 w/ 8x3.5

⁄8 x 1⁄8 37.0 w/ 10x4

⁄16 48.0 w/ 14x4.5

⁄8 x 7⁄32 62.0 w/ 18x5.5

⁄8 108.0 w/ 28x8

⁄16 133.0 w/ 36x10

/8 N/A

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4.3.3 Terminal Connections

Wiring connections to the SMB geared limit switch, torque switch, and Marathon terminal strips are to be made using ring-tongue terminals* as shown below:

Figure 4.1 – Wiring Connections

Table 4.3– Terminal Connections

AWG Screw Hole Insulation

22-16 #10 Vinyl 18RA-10 .97 .31 .27

18-14 #10 Vinyl 14RB-10 .97 .31 .27

12-10 #10 Vinyl 14RC-10 1.06 .31 .27

Note: Limit switch and torque switch contacts are rated 300 volts per NEMA ICS-2

Thomas &

Betts P/N

A B C

Terminals are to be crimped using Thomas & Betts crimping tool WT112M or ERG4001.

Manufacturer: *Thomas and Betts or equal

4.4 Setting The Limit Switch

c WARNING: Disconnect all incoming power before opening or replacing the limit switch compart-

ment cover.

a CAUTION: When wiring control circuits, distinguish between “normally open” and “normally

closed” terminals on the geared limit switch.

a CAUTION: Do NOT attempt to repair the limit switch gear box. Replace entire limit switch gear

box.

a CAUTION: Do NOT use abrasive cloth to clean the silver contacts on the limit switch. Contacts

should be burnished using appropriate burnishing tool.

a CAUTION: Before motor operation, reset the geared limit switch if the actuator has been

dismantled or removed from the valve.

NOTE: Clean the limit switch cover thoroughly and apply a thin coat of grease on machined ﬂange surfaces before mounting on an explosion proof actuator.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4.4.1 Two-Train Geared Limit Switch

The rotor-type, two-train geared limit switch employs two rotors. Each rotors contains four contacts. When the rotor is properly set to trip at the desired position, two of these contacts open electric circuits and two of the contacts close electric circuits. One rotor is normally set to trip at the full open position of the valve, and the other rotor is normally set to trip at the full close position of the valve.

Each rotor may be adjusted independently of the other:

• First rotor—one circuit is used to open the “open” holding coil circuit of the motor controller, one circuit is used to control the “open” indicating light.

• Second rotor—one circuit is used to open the “close” holding coil circuit of the motor controller, one circuit is used to control the “closed” indicating light.

For the geared limit switches to trip at any desired position, follow the setting procedure below.

Piece numbers refer to Figure 4.2 and Table 4.4.

1. Verify all power is OFF.

2. Using the handwheel, manually open the valve to the full open position. See Section 5.2 Manual

Operation. Note the direction of rotation of the Intermittent Gear Shaft (piece #42), located over the Rotor (piece #49) to be set.

3. Using a screwdriver, turn the Set Rod (piece #48) clockwise until it reaches a stop position.

4. If the Rotor (piece #49) you are setting has not turned 90° to open the contacts that should trip

open at this position, insert screwdriver on the Intermittent Gear Shaft (piece #42). Turn in the direction noted in Step No. 4 until the Rotor (piece #49) turns and opens the contacts to be set.

5. If the Rotor (piece #49) has turned so that the contacts are already open, turn the Intermittent

Gear Shaft (piece #42) in the opposite direction as previously noted in Step No. 4 until the contacts close. Turn the Intermittent Gear Shaft (piece #42) slightly in the direction noted in Step No. 4 until the contacts open. The Rotor (piece #49) is set at the correct position for contact opening.

Note: In the contact “Close” position, ensure a gap exists between the contact ﬁnger and the L-bracket as seen in ﬁgure 4.2

6. Back off the Set Rod (piece #48) until it stops. Place the screwdriver on the Intermittent Gear

Shaft (piece #42) to ensure that the shaft is tight and will not rotate. Do not force.

7. Close the valve completely. Repeat Step No. 1 through 6 to set the tripping position for the other

Rotor (piece #49).

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

64 66 67

42 49

50 41 51 47 43 46 44 52 1

Figure 4.2 – Two-Train Geared Limit Switch – Rotor-Type

Contact Finger

GAP

5 10 3

L-Bracket

68 69 71

11 6 8 7 55 4 58 45 48 53

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 4.4 – Two-Train Geared Limit Switch Parts List

Piece Description

1 Cartridge

2 Drive Sleeve and Shaft

3 Drive Pinion

4 Drive Pinion (Secondary)

5 Declutch Spring

6 Bushing

7 O-Ring

8 Pin

9 Groove Pin

10 Washer

11 Oil Seal

41 Gear Frame

42 Intermittent Gear Shaft

43 Intermittent Pinion Shaft

44 Geared Limit Frame Cover

45 Intermittent Gear

46 Intermittent Pinion

47 Stem Spur Pinion

48 Set Rod

49 Rotor

50 Groove Pin

51 Cover Gasket

52 Long Fillet Head Machine Screw

53 O-Ring

54 Setting Rod Bushing

55 Gear Frame Gasket

56 Insert (Rotor)

57 O-Ring (For Intermittent Gear Shaft piece #42) (Not shown)

58 Groove Pin

61 Finger Base

62 Right Hand Finger Assembly

63 Left Hand Finger Assembly

64 Long Hex Head Machine Screw

65 Lockwasher

66 Hex Nut

67 Washer

68 Long Fillet Head Cap Screw

69 Internal Tooth Lockwasher

71 Flat Washer

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

53 41

4.4.2 Four-Train Geared Limit Switch

The rotor-type, four-train geared limit switch employs four rotary drum switches. Each rotary drum switch contains four contacts. When the rotor is properly set to trip at the desired position, two of these contacts open electric circuits and two of the contacts close electric circuits. One rotor is set to trip at the full open position of the valve, and one rotor is set to trip at the full close position of the valve. The other two rotors are set at some intermediate position depending on the application.

For the geared limit switches to trip at any desired position, follow the steps in Section 4.4.1, Two-Train Geared Limit Switch, with the exception that the piece numbers refer to Figure 4.3 and Table 4.5.

NOTE: The upper Set Rod (piece #48) allows adjustment of the two adjacent upper rotors, and the lower Set Rod (piece #48) allows adjustment of the two adjacent lower rotors.

Figure 4.3 – Four-Train Geared Limit Switch – Rotor Type

22 23

5552445845

57 47 50 49

68 69 71

01-472-0007-3

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 4.5 – Four-Train Geared Limit Switch Parts List

Piece Description

21 Cartridge

22 Oilite Bushing

23 Drive Shaft

24 Drive Pinion (Internal)

25 Helical Pinion

26 Groove Pin

27 Drive Sleeve and Gear

28 Declutch Spring

29 Drive Pinion Spur

30 Pin

31 Cartridge Gasket

32 Cartridge Mounting Plate

33 Long Socket Head Cap Screw and Lockwasher

34 O-Ring

35 O-Ring

36 Fillet Head Cap Screw and Lockwasher

41 Gear Frame

42 Intermittent Gear Shaft

43 Intermittent Pinion Shaft

44 Geared Limit Frame Cover

45 Intermittent Gear

46 Intermittent Pinion

47 Stem Spur Pinion

48 Set Rod

49 Rotor

50 Groove Pin

51 Cover Gasket

52 Long Fillet Head Machine Screw

53 O-Ring

54 Setting Rod Bushing

55 Gear Frame Gasket

56 Insert (Rotor)

57 O-Ring

58 Groove Pin

61 Finger Base

62 Right Hand Finger Assembly

63 Left Hand Finger Assembly

64 Long Hex Head Cap Screw

65 Lockwasher

66 Hex Nut

67 Washer

68 Long Fillet Head Cap Screw

69 Internal Tooth Lockwasher

71 Flat Washer

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4.5 Setting Torque Switch

The torque switch is designed to protect the actuator in open and close directions.

c WARNING: Disconnect all incoming power before working on the torque switch.

c WARNING: Do not attempt to remove either the spring cartridge cap or the housing cover from

the actuator while the valve is torque-seated.

a CAUTION: Do not use abrasive cloth to clean the contacts on the torque switch.

a CAUTION: A maximum stop setting plate is furnished on all actuators. Do not exceed this

maximum setting without consulting Limitorque.

NOTE: See Section 4.3.3 for wiring connection requirements.

4.5.1 SMB-000 “Cam Style” Double Torque Switch

NOTE: Torque settings must be made with the switch mounted in the actuator.

Piece numbers correspond to Figure 4.4 and Table 4.6.

To set the torque switch:

1. Verify all electric power is OFF.

2. Loosen Pan Head Screws (piece #30).

3. For open or close operation, set Striker (piece #25) to the required torque setting. Match the edge of the Striker with the desired number. The higher the number, the higher the torque output of the actuator.

4. Tighten Pan Head Screws (piece #30).

5. For torque seated valves, operate the valve electrically to seat the valve. Ensure tight shut-off by tripping the torque switch contacts.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

91211105 6481437

Figure 4.4 – SMB-000 “Cam Style” Double Torque Switch

38 39

23 21 321937 36

30 32 312522

27 24 25 26 25 23 22

17 11618333435

21 43 20

SECTION A-A

VIEW B-B

01-474-0056-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 4.6 – SMB-000 “Cam Style” Double Torque Switch Parts List

Piece Description

1 Terminal Block

2 Contact Block

3 Contact Screw

4 Finger Holder

5 Finger

6 Shunt

7 Shunt Washer

8 Rivet

9 Finger Spring Stud

10 Compression Spring

11 Spring Cup Washer

12 Cotter Pin

13 Hex Head Machine Screw

14 Ring Tongue Connector

15 Shakeproof Lockwasher, Internal Teeth

16 Torque Switch Mounting Bracket

17 O-Ring

18 O-Ring

19 Socket Head Cap Screw

20 Cam

21 Torsion Spring

22 Spring Mandrel

23 Dial

24 Shaft

25 Striker

26 Torque Limiting Plate

27 Striker Hub

28 Roll Pin

29 Swage Nut

30 Pan Head Screw

31 Shakeproof Lockwasher, External Teeth

32 Flatwasher

33 Arm

34 Roller

35 Roller Pin

36 Groove Pin

37 Arc Barrier

38 Pan Head Screw

39 Lockwasher, External Tooth

42 Spring Pin

43 Cam Insert

44 Bushing (For piece #16)

45 Washer

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4.5.2 SMB-000 and SMB-00 “C Style” Double Torque Switch

NOTE: Torque settings must be made with the switch mounted in the actuator.

NOTE: See Section 4.3.3 for wiring connection requirements.

Piece numbers correspond to Figure 4.5 and Table 4.7.

To set the torque switch:

1. Verify all electric power is OFF.

2. For the open or close direction torque switch, loosen Machine Screw (piece #35) and set Pointer (piece #7) at the desired torque setting. The higher the number, the higher the torque output of the actuator.

3. Tighten Machine Screw (piece #35).

4. For torque seated valves, operate the valve electrically to seat the valve. Ensure tight shut-off by tripping the torque switch contacts.

Figure 4.5 – SMB-000 and SMB-00 “C Style” Double Torque Switch

30 34

39 27

29 16

42 47

39/52

27/50

01-473-0056-3

2122101528

ﬂowserve.com

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 4.7 – SMB-000 and SMB-00 “C Style” Double Torque Switch Parts List

Piece Description

1 Terminal Block

2 Contact Block

3 Hex Nut - Remove and discard

4 Contact Arm

5 Dial

6 Actuating Link

7 Pointer

8 Tripper Arm

9 Shaft

10 Contact Support

11 Torque Limiter Plate

12 Bushing (SMB-00 only)

13 Roller

14 Roller Pin

15 Contact Finger

16 Terminal Stud

17 Compression Spring

18 Torsion Spring

20 Bearing

21 O-Ring

22 O-Ring

23 Groove Pin

25 Thrust Washer

27 Lockwasher

28 Groove Pin

29 Hex Nut

30 Hex Nut

31 Cotter Pin

33 Pan Head Machine Screw

34 Hex Socket Set Screw

35 Round Head Machine Screw

36 Round Head Machine Screw

37 Insulating Material

39 Flatwasher

41 Round Head Machine Screw

42 Lockwasher, Internal Teeth

43 Socket Head Cap Screw

44 Lockwasher

45 Mounting Bracket

46 Dial Plate (SMB-00 only)

47 Socket Head Cap Screw

48 Lockwasher (SMB-000 only)

49 Insulator (SMB-000 only) - Not Shown

50 Lockwasher (SMB-000 only)

51 Lockwasher (SMB-000 only)

52 Lockwasher (SMB-000 only)

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

01-473-0057-3

4.5.3 SMB-0 through SMB-5 Double Torque Switch

NOTE: Torque settings must be made with the switch mounted in the actuator.

NOTE: See Section 4.3.3 for wiring connection requirements.

Piece numbers correspond to Figure 4.6 and Table 4.8.

To set the torque switch:

1. Verify all electric power is OFF.

3. Tighten Machine Screw (piece #35).

4. For torque seated valves, operate the valve electrically to seat the valve. Ensure tight shut-off by tripping the torque switch contacts.

Figure 4.6 – SMB-0 through SMB-5 Double Torque Switch

43 44

30 34

42 47

39 27

29 16

41 27

01-473-0057-3

2122101528

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 4.8 – SMB-0 through SMB-5 Double Torque Switch Parts List

Piece Description

1 Terminal Block

2 Contact Block

3 Hex Nut - Remove and Discard

4 Contact Arm

5 Dial

6 Actuating Link

7 Pointer

8 Pinion

9 Shaft

10 Contact Support

11 Torque Limiter Plate

12 Bushing

13 Spacer

15 Contact Finger

16 Terminal Stud

17 Compression Spring

18 Torsion Spring

20 Bearing

21 O-Ring

22 O-Ring

23 Pin

25 Thrust Washer

27 Lockwasher

28 Pin

29 Hex Nut

30 Hex Nut

31 Cotter Pin

33 Pan Head Self-Tapping Screw

34 Hex Socket Set Screw

35 Round Head Machine Screw

36 Round Head Machine Screw

37 Insulating Material

39 Flatwasher

41 Round Head Machine Screw

42 Lockwasher, Internal Teeth

43 Socket Head Cap Screw

44 Lockwasher

45 Mounting Bracket

47 Socket Head Cap Screw

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4.6 Position Indication

4.6.1 Local Position Indicator

NOTE: The local dial position indicator displays valve position. The position indicator can only be adjusted when the actuator is mounted on the valve. See Figures 7.1-7.3 (SMB-000), 7.4-7.8 (SMB-

00), 7.9-7.12 (SMB-0 through 4), 7.13-7.16 (SMB-5).

To set the position indicator:

1. Disconnect all incoming power and open or remove the Limit Switch Compartment Cover.

2. Place the valve in the fully “close” position.

3. Loosen the round head machine screw that holds the pointer in place, move the pointer to the “C” position, and retighten the screw.

The indicator is now set.

4.6.2 Remote Position Indicator

(50 ohm or 1000 ohm Potentiometer)

The SMB or SB actuator with a potentiometer installed, transmits a 0-10 VDC output signal to a remote position indicator (meter). The potentiometer is powered by 120 VAC.

To set the potentiometer: NOTE: The pinion has been disengaged to prevent damaging the potentiometer prior to setting the

valve.

1. Set the potentiometer by turning the pinion until the desired reading is obtained.

2. Loosen the hex nut on the back of the potentiometer and slide the potentiometer in the direction of the idler pinion until the pinions are engaged.

3. Do not force the engagement of the pinions.

4. Retighten the hex nut on the back of the potentiometer.

5. Do not engage the pinion until the actuator and valve positions have been set.

To calibrate the potentiometer:

1. Position the valve at 50% of full travel.

2. Read the resistance from the wiper to either end of the potentiometer.

3. To set the potentiometer to the proper value, loosen the set screw on the potentiometer shaft pinion and rotate the potentiometer shaft to a reading of ~500 ohms for the 1000-ohm potentiometer, or ~25 ohms for the 50-ohm potentiometer.

4. Tighten the set screw.

5. Run the actuator to the fully CLOSED position.

6. Adjust the CLOSED position setting to a value at or above 0 ohms.

7. Run the actuator to the fully OPEN position.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

8. Adjust the OPEN position setting to a value at or below 1000 ohms for the 1000-ohm potentiometer; at or below 50 ohms for the 50-ohm potentiometer.

9. Repeat steps 5 through 8 and ﬁne-tune as necessary.

4.6.3 Remote Position Indicator

(Resistance-to-Current Signal Converter)

The SMB or SB actuator with a signal converter installed transmits a 4-20 mA output signal to a remote position indicator (meter). The signal converter responds to the input of a 1000-ohm potentiometer and can be powered by 24 VDC or 120 VAC for the older version R/I converter; or 18 VDC, 24 VDC, or 120 VDC for the PT20SD style R/I converter.

To set the R/I signal converter: NOTE: The pinion has been disengaged to prevent damaging the potentiometer prior to setting the

valve.

1. Set the potentiometer by turning the pinion until the desired reading is obtained.

2. Loosen the hex nut on the back of the potentiometer and slide the potentiometer in the direction of the idler pinion until the pinions are engaged.

3. Do not force the engagement of the pinions.

4. Retighten the hex nut on the back of the potentiometer.

5. Do not engage the pinion until the actuator and valve positions have been set.

To calibrate the R/I signal converter:

1. Position the valve at 50% of full travel.

2. Read the ohms from the wiper to either end of the potentiometer.

3. To set the potentiometer to the proper value, loosen the set screw on the potentiometer shaft pinion and rotate the potentiometer shaft to a reading of 500 ohms.

4. Tighten the set screw.

5. Run the actuator to the fully CLOSED position.

6. Adjust the ZERO control to an output of 4 mA.

7. Run the actuator to the fully OPEN position.

8. Adjust the SPAN control to an output of 20 mA.

9. Repeat steps 5 through 8 to ﬁne-tune as necessary.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Remote position indicator

0-10 volts full scale deﬂection

Control voltage range

110 volts to 480 volts

Potentiometer 1000 ohm 2 Watt

customer’s equipment

terminal as valve opens

Figure 4.7 – Typical Connection for a 50-ohm Potentiometer

25 Watt, 50 OHM Potentiometer type

variable resistor mounted in SMB/SB housing

Voltmeter

type

P3P2P1

RES

175 Watt, 2500 ohm Adjustable resistor

to be located adjacent to remote position indicator

Figure 4.8 – Typical Connection for a 1000-ohm Potentiometer

for voltage adjustment

in limit switch housing

(CCW)

Potentiometer slider rotates

toward counter clockwise (CCW)

Figure 4.9 – Typical Connection for R/I Signal Converter (Older Version)

4-20 mA

Output Signal

(CW)

(–)90(+)CL2CL1

1000 ohm

POT

91 90 CL2 CL1 P1 P2 P3

(–) (+)

R to I

Signal Converter

PC Board

Connection

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

POT

24 VDC or 18 VAC See comments under Section

4.6.3,

Figure 4.10 – Typical Connection for PT20SD R/I Converter

1000 ohm

(S)

4-20 mA

Output Signal

(+)

(–)

(+)

(–)

BLU

18V

115V

Black

Brown

Orange

Green

2 3

4 5

(CCW)

(+)m A

(–)m A

COM

Signal Converter

1 BLK

3 RED

2 BRN

CCW SC W

LK2

LK3

(CW )

4.7 Additional Electrical Components

4.7.1 Reversing Starter

The reversing starter electrically changes the operation of the electric motor from one direction of rotation to the other. The starter consists of two contactors mounted on a common base and mechanically interlocked.

Each contactor consists of the following:

• three normally open power contacts

• one normally open circuit holding contact

• one normally closed interlock

• one magnetic holding coil.

The starter can be provided two ways:

• Mounted within the actuator limit switch compartment

• Supplied in a separate enclosure

4.7.2 Overload Relays

Overload relays de-energize the holding coils of the reversing starter, which open the power contacts to de-energize the electric motor. The relays function at a predetermined current value and can reset either automatically or manually as follows:

• Reset automatically if mounted as detailed in Figure 4.11.

• Reset manually if the reversing starter is furnished separately.

The relays are sized in accordance with full load (running) motor current.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4.7.3 Control Station

The control station consists of

• a ﬁve-position Local-Stop-Off-Stop-Remote selector switch, padlockable in each position

• a spring return Open-Close selector switch

• green and red LED lights for position indication.

Typical wiring of the control station in conjunction with the motor control circuit is shown below in Figure 4.11.

Figure 4.11 – Typical Wiring Diagram – Built-in Reversing Starter and Control Station for a

Three-Phase Power Supply

Motor

CL1

PB2

STOP

Black

LOCAL

Red

Green

To customer’s equipment

Remote indication if required

HTR1

HTR2

White

CL2

(H1)(H3) (H2)(H4)

CPT

(X1) (X2)

FUSE

OFF

REMOTE

Purple

Gray

OPEN

Brown

Orange

Pink

PB1

Yellow

PB3

CLOSE (51)

COMMON (11)

STOP (9)

REMOTE (31)

REMOTE (30)

Blue

OPEN (41)

NOTE: Current design. Earlier control wiring varies slightly.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Operation

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices prior to

operation.

5.1 Motor Operation

Actuator motors are high-starting torque, totally enclosed motors. The motors are furnished in weatherproof, explosionproof, or submersible enclosures. The motors are furnished with ball bearings and provided with grease seals. All three-phase AC motors are squirrel-cage design and all DC motors are compound wound.

Piece numbers refer to Figure 7.9 through 7.11. However, this description is applicable to all models. The piece numbers will differ for each model.

The electric motor has a Motor Pinion (piece #40) mounted on its shaft extension. This pinion drives the Worm Shaft Clutch Gear (piece #41), which is engaged with the Worm Shaft Clutch (piece #50). The Worm Shaft Clutch is splined to the Worm Shaft (piece #43). The Worm (piece #53) is splined to the Worm Shaft (piece #43), and when it is rotated, it turns the Worm Gear (piece #16).

The Worm Gear has two lugs cast onto the top portion that engage the two lugs on the Drive Sleeve (piece #11). These lugs are spaced so that when the Worm Gear begins to turn during motor operation there is a certain amount of lost motion before the lugs engage, causing the hammer blow effect within the actuator.

As soon as the Worm Gear Lugs engage, the Drive Sleeve, splined internally with the Stem Nut (piece #20), causes the stem nut to rotate and open or close the valve. The Stem Nut is threaded to ﬁt the thread of any rising stem valve. In the case of non-rising stem valves, the electric actuator may be mounted in tandem with an additional gear drive, and the Stem Nut (piece #20) is bored and keyed to ﬁt the shaft.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

The thrust developed by the actuator is absorbed by the heavy-duty Bearings (piece #75, 76, 77,

78) on the top and bottom of the main Drive Sleeve. As the actuator develops greater torque, when seating the valve, the Worm (piece #53) slides axially along the splines of the Worm Shaft (piece #43) and compresses the Belleville Springs (piece #56) in the torque spring pack.

The Belleville Springs are calibrated springs. For every increment of compression from a given size unit, a certain pre-determined amount of torque is developed. The Worm mechanically actuates the Torque Switch. When the Worm moves back a preset distance and develops the torque output required, the Torque Switch opens and a pair of electrical contacts that are wired into the motor control circuit interrupt the circuit and stop the motor.

The Geared Limit Switch (piece #105) is directly geared to the Worm Shaft and is in step at all times with the movement of the actuator. The switch cannot slip because no belts or other friction devices are used in its operation. Once the Geared Limit Switch (piece #105) is set to trip at its proper position of valve travel, it will trip at the same point every time.

The Torque Switch (piece #104) is wired into the motor control circuit to stop the actuator in the full closed position for any rising stem operation. The Geared Limit Switch (piece #105) is wired into the motor control circuit to stop the operator at the full open position. For most 90° turn valves and sluice gates, the Geared Limit Switch is wired into the motor control circuit to stop the actuator at both the full open and full close position of the valve or gate. The Torque Switch is wired in series with the Geared Limit Switch in both directions so that in the event of a mechanical overload, the Torque Switch will open and cause the motor to stop.

Check the applicable wiring diagram to determine the correct wiring connections made for the torque switch and geared limit switch.

5.2 Manual Operation

In the event of a power failure, the actuator can be operated by hand using the handwheel. The actuator has an automatic handwheel declutching arrangement. For manual operation, the declutch lever is pulled downward. This mechanically disconnects the electric motor from the handwheel through the clutch assembly.

5.2.1 SMB-000 and SMB-00

The operation of the SMB-000 and SMB-00 are functionally the same. Due to a difference in piece numbers between these actuators, the following description refers to the SMB-000 (Figures 7.1 to

7.3).

For the SMB-000 and the SMB-00, the Clutch Ring (piece #33) and the Clutch Keys (piece #23) are moved upward until the Clutch Keys engage with the lugs on the bottom of the Handwheel (piece #5). For the side-mounted Handwheel on the SMB-00, the Clutch Keys engage the lugs on the bottom of the Bevel Gear (piece #100).

Trippers (piece #28, 29) hold the Clutch Keys in this position. The actuator will remain in hand operation indeﬁnitely until the electric motor is energized and the Tripper Cams (piece #27) mounted on the

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Worm Shaft (piece #21) cause the trippers to release the Clutch Ring (piece #33) and the Clutch Keys (piece #23) from their hand position. This is an automatic feature of the actuator.

5.2.2 SMB-0 through SMB-4

Piece numbers refer to Figures 7.9 to 7.11.

The declutching action is similar to that of the smaller SMB actuators. When the Declutch Lever (piece #10) is depressed, the Declutch Shaft (piece #24) causes the Declutch Fork (piece #12) to push the Worm Shaft Clutch (piece #50) out of engagement with the worm shaft clutch gear (piece #41) and into engagement with the Handwheel Clutch Pinion (piece #42). The Clutch Trippers (piece #32) lock the worm shaft clutch in this position. When the Handwheel (piece #5) is rotated, the Handwheel Gear (piece #7) turns the Handwheel Clutch Pinion (piece #42) and the Worm Shaft (piece #43), placing the actuator into manual operation.

When the electric motor is energized, the Tripper Pins (piece #51), which are part of the Worm Shaft Clutch Gear (piece #41), cause the Trippers to be released, allowing the Worm Shaft Clutch (piece #50) to be released from hand operation and engage in motor operation.

For all actuator sizes, when the handwheel is turned, the motor does not rotate; and when the motor is in operation, the handwheel does not rotate in manual operation.

5.2.3 SMB-5 through SMB-5T

Piece numbers refer to Figures 7.13 to 7.16.

The declutching action is similar to that of the smaller SMB-0 through 4 actuators. When the Declutch Lever (piece #9) is depressed, the rotation of the Declutch Shaft (piece #30) causes the Declutch Fork (piece #14) to push the Sliding Gear Clutch (piece #51) out of engagement with the Flexible Jaw Clutch Housing (piece #50) and into engagement with the Handwheel Gear (piece #6). The Clutch Trippers (piece # 33, 34) lock the Drive Shaft Clutch in this position. When the Handwheel (piece #10) is rotated, the Handwheel Shaft and Pinion (piece #40) turns the Handwheel Gear (piece #6) and the Hollow Drive Shaft (piece #55), placing the actuator into manual operation.

When the electric motor is energized, the Motor Clutch Gear Cam Pins (piece #52), which are part of the Flexible Jaw Clutch Housing (piece #50), causes the Clutch Trippers (piece #33, 34) to be released, allowing the Sliding Gear Clutch to be released from hand operation and engage in motor operation.

For all actuator sizes, when the handwheel is turned, the motor does not rotate; and when the motor is in operation, the handwheel does not rotate.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Maintenance

6.1 Routine Maintenance

c WARNING: See Section 4.1 and 4.2 for Safety Precautions and Safety Practices before

performing maintenance.

NOTE: A routine maintenance check should be performed every 18 months as a minimum. The frequency can increase based upon the frequency of operation and the ambient environmental conditions.

The routine maintenance check consists of the following:

1. Remove the limit switch compartment and/or control cabinet cover. Inspect for moisture. If moisture is present, dry the compartment and the components.

2. Inspect all electrical controls and contacts in the limit switch compartment and/or control cabinet. Wipe clean all electrical contacts with electrical-type solvent cleaner similar to CRC Lectra Clean and remove foreign residue.

3. Check armature brushes for proper contact and wear when DC motors are employed.

4. Verify all terminal connections are tight.

5. Clean gasketed surfaces on limit switch compartment and/or control cabinet cover. Inspect gaskets and seals for damage. Replace all damaged gaskets or seals for weatherproof and submersible units. Wipe a coating (approximately two mils) of lightweight bearing grease on surfaces of explosionproof cover ﬂanges for protection.

6. Inspect lubricant in accordance with Section 6.3.1, Lubrication Inspection. Visually check shaft penetrations for indications of seal leakage. If abnormal leakage is found, replace the seal.

NOTE: Slight oil weepage is not a cause for seal replacement. See Section 6.2, Major Maintenance.

7. Megger test the motor—1 megaohm or higher is considered normal.

8. Clean and lubricate the valve stem for rising stem applications in accordance with the valve manufacturer’s lubricant recommendation.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

6.2 Major Maintenance

NOTE: Major maintenance is required when an operational deﬁciency is evident. The deﬁciency should be thoroughly evaluated to determine the extent to which major maintenance should proceed.

Major maintenance consists of the following:

1. Perform all routine maintenance checks. See Section 6.1, Routine Maintenance.

2. Disassemble deﬁcient portion of equipment.

3. Replace damaged or excessively worn components with new factory parts.

NOTE: Replace the Worm and Worm Gear as a set to ensure the greatest beneﬁt from replacement. Replace the entire limit switch gear box rather than attempt repairs in the ﬁeld.

4. Replace all torn gaskets and seals.

5. Inspect stem and stem nut threads carefully for wear and/or damage.

6. Verify all electrical control components are operating before reinstallation.

6.3 Lubrication

Proper lubrication is essential to achieve the actuator design life. The actuator has been designed to minimize maintenance and relubrication requirements. However, periodic inspection is a necessity.

The SMB and SB actuators have a totally sealed gear case, factory-lubricated with grease. The gear case can be mounted in any position. However, those mounting positions that would result in the actuator motor being saturated with lubricant if the seal failed should be avoided and are not recommended.

No seal can remain absolutely tight at all times. Therefore, it is not unusual to ﬁnd a small amount of weeping around shaft seals—especially during long periods of idleness such as storage. Grease lubrication minimizes this condition as much as possible. If a small amount is weeping at start-up, remove it with a clean cloth. Once the equipment is operating on a regular basis, the weeping should stop. Lubricant weeping is normal when there is infrequent operation and does not affect the functionality of the actuator. Weeping is not covered by the standard warranty.

6.3.1 Lubrication Inspection

Inspect Limitorque SMB and SB actuators for correct lubrication prior to operating—particularly following a long storage period.

Each application has its own effect on the actuator and the frequency of these inspections should be based on the application and the operating experience. The following lubrication inspection schedule is recommended until operating experience indicates otherwise.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Application Lubrication Recommendations

Main Gear Case

Inspect lubrication every 18 months or 500 cycles – whichever occurs ﬁrst.

Geared Limit Switch

Drive Sleeve Top Bearing

Inspect lubrication every 36 months or 1000 cycles – whichever occurs ﬁrst.

Lubricate every 6 months through housing cover pressure ﬁtting.

During an inspection, consider the following:

• Quantity—SMB and SB actuators are built to operate on the immersion principle.

a CAUTION: Ensure there is enough lubricant so that the Worm and the Worm Gear are totally

immersed in grease regardless of the position. Use the “ﬁll” and “drain” plugs provided on the actuator housing to verify this.

• Quality—Inspect lubricant for dirt, water, or foreign matter. If any of these are found, it is recommended that the lubricant be replaced. This will require partial or complete mechanical disassembly of the actuator. Repack the actuator with fresh lubricant, allowing room for thermal expansion of the lubricant. See Section 10 for ordering replacement parts.

• Consistency—Ensure the lubricant is ﬂuid, approximating a standard NLGI-0 grade consistency.

6.3.2 Standard Lubricant

• The SMB/SB actuator gear case is factory lubricated with an NLGI Grade 0 calcium sulfonate base grease suitable for continuous ambient temperatures from -20°F (-29°C) to 150°F (66°C). Other lubricants approved by Flowserve Limitorque may be used based on customer requirements. The actuator nameplate states the original lubricant type supplied.

NOTE 1: For nuclear containment actuators, Exxon Nebula EP-0 and EP-1, or Crompton MOV-Long Life, Grade 0 are the only approved lubricants for SMB/SB-000 through 5.

• Geared Limit Switch: Mobil 28.

• Motor Bearings: Motors furnished for Limitorque actuators are lubricated for life.

• Temperature rating is -20°F to 150°F (-29°C to 66°C).

NOTE 2: SMB/SB/SBD-000,00 standard lubricant was Sun Oil Co. (XC-421-39) for serial numbers up to 295809. Sun 50EP (XC-421-39) should not be mixed with calcium base greases.

Table 6.1 – Approximate Volume and Weights of Lubricants

Actuator Size

SMB/SB-000 .32 1.2 2.7 1.2

SMB/SB/SBD-00 1.0 3.8 8.5 3.8

SMB/SB/SBD-0 1.2 4.5 10.0 4.5

SMB/SB/SBD-1 1.4 5.3 12.0 5.4

SMB/SB/SBD-2 2.7 10.2 22.3 10.1

SMB/SB/SBD-3 5.5 20.8 46.0 20.9

SMB/SB/SBD-4 9.4 35.6 75.0 34.0

SMB-5T 10.0 37.8 80.0 36.4

SMB-5 11.2 42.4 90.0 40.9

Approximate Volume Approximate Weight

gallons liters lb. kg

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

6.3.3 Minimum Lubricant Qualities Required

a CAUTION: Do not mix lubricants of a different chemical base. Mixing lubricant bases may cause

lubricant properties to be ineffective.

a CAUTION: Do not add a different lubricant to an actuator unless it consists of the same soap base

as the existing lubricant unless you have received lubricant manufacturer approval.

The standard lubricants used by Limitorque have been proven to be extremely reliable over the years of service. Other lubricants may be used in place of the standard. Limitorque does require the following lubricant qualities as a minimum.

The lubricant must:

• contain an “EP”additive.

• be suitable for the temperature range intended.

• be water and heat-resistant and non-separating.

• not create more than 8% swell in Buna N or Viton.

• not contain any grit, abrasive, or ﬁllers.

• comply with Slump-prefer NLGI grades 00 to 1.

• not be corrosive to steel gears, ball or roller bearings, or yellow metals (bronze, brass, or copper alloys).

• have a dropping point above 316°F (158°C) for temperature ranges of -20°F (-29°C) to 150°F (66°C).

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

SMB Disassembly

and Reassembly

NOTE: For explosion proof applications, brush-apply a thin coating of Mobil Inﬁnitec 152 or equivalent grease to the ﬂanged surfaces of the gear housing and mating limit switch compartment cover. Remove excess grease after bolting the cover in place. Mobil Inﬁnitec 152 is a synthetic automotive wheel bearing grease that is resistant to high temperatures and water wash-out.

7.1 SMB-000

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

7.1.1 To Replace the Stem Nut Only

c WARNING: Do not remove the Locknut (piece #30) with actuator under load or with the valve

under pressure.

a CAUTION: If valve must be left in service while the stem nut is replaced, the valve stem must be

locked in such a way as to prevent any movement of the valve stem.

1. Remove Locknut (piece #30). The locknut is staked in two places; locate the stakes and spot with a drill.

2. Clean all metal particles.

3. Lift Stem Nut (piece #11) out of the top of the actuator.

If the actuator is mounted on a valve having a threaded stem and stem nut removal is required, proceed as follows:

1. Remove the Locknut (piece #30).

2. Declutch actuator for manual operation.

3. Rotate the Handwheel (piece #5) to close the valve.

4. When the stem nut splines are free from the Drive Sleeve (piece #8), the Stem Nut may be rotated by hand for the remainder of the length of the valve stem and replaced, if necessary.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

To reinstall the Stem Nut onto the Keyed Shaft:

1. Lower the Stem Nut into the Drive Sleeve, aligning the splines, until the Stem Nut is seated.

2. Install the Key.

3. Install the Locknut.

4. Stake in two (2) places, 180° apart.

To reinstall the Stem Nut onto a Threaded Shaft:

1. Rotate the Stem Nut on the shaft until the Stem Nut splines engage the Drive Sleeve splines.

2. Rotate the Handwheel to open the valve until the Stem Nut is seated.

3. Install the Locknut.

4. Stake the top threads in two (2) places, 180° apart.

7.1.2 SMB-000 Disassembly

Piece numbers refer to Figures 7.1-7.2.

1. Verify power to actuator is OFF.

2. Remove or swing open the Limit Switch Compartment Cover (piece #3).

3. Disconnect the leads from the Geared Limit Switch (piece #95) and the Torque Switch (piece #93). Verify the leads are marked for reconnecting to the terminals.

4. Remove the two screws each on the Geared Limit Switch and the Torque Switch. Remove the Geared Limit Switch and the Torque Switch.

5. Remove the motor leads from the Motor Terminal (piece #91) inside the limit switch compartment. Remove the Motor Assembly (piece #92) and guide the motor leads through the conduit opening.

NOTE: The Motor Pinion (piece #20) is keyed to the motor shaft and held there with a set screw to retain the Motor Pinion in its proper position.

6. Verify actuator is in motor operation in order to unload tripper level (piece #15) assembly.

7. Remove Declutch Lever.

8. Remove Spring Cartridge Cap Cover (piece #43).

9. Remove Spring Cartridge Cap (piece #2).

10. Pull the Worm (piece #24) and Torque Spring Assembly directly out.

11. Remove Tripper Lever (piece #15) assembly.

NOTE: A hex head cap screw (piece #120) locates and secures the Tripper Lever (piece #15) on the Declutch Shaft (piece #40) (end of shaft should be ﬂush with tripper lever).

12. Remove Housing Cap (piece #6) and Handwheel Assembly (piece #5).

13. Remove Drive Sleeve Assembly completely including pieces #8, 10, 11, 17, 23, 30, 33, 34, 50, 67, and 69. Press off the lower drive sleeve Roller Bearing Cone (piece #67). Slide off all remaining pieces.

14. Remove Flexloc Nut (piece #77). Remove Worm Shaft Gear (Piece #22).

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

15. Remove Tripper Cam (piece #27) and Cam Spacers (pieces #31, 37).

16. Remove Worm Shaft (piece #21), Bearing (piece #70) and Worm Shaft Bearing Cap (piece #4).

17. Remove internal Retaining Ring (piece #74). Remove Worm (piece #24) from worm assembly.

18. Remove the Retaining Ring (piece #75) from declutch shaft. Pull the Declutch Shaft (piece #40) and the Declutch Fork (piece #9) out of the actuator from the motor side of the actuator.

7.1.3 SMB-000 Reassembly

a CAUTION: Read gasket instructions 7.1.4 before replacing gaskets.

To reassemble, follow the disassembly procedure in the reverse order noting the following:

• Step 18 of Disassembly procedure—orient the Declutch Fork (piece #9) on the Declutch Shaft

(piece #40) as shown in Figures 7.1 and 7.2.

• Step 6 of Disassembly procedure - manually declutch unit and rotate Worm Shaft Gear (piece #22)

to verify proper tripper operation.

Adjust Clutch Trippers

1. Loosen lock screw (piece #113) on Tripper Adjustment Arm (piece #26).

2. Hold down Declutch Lever (piece #7). Lift Tripper Adjustment Arm up to touch Trippers (pieces #28, 29). Tighten lock screw on Tripper Adjustment Arm.

3. Rotate Worm Shaft Gear (piece #22) to ensure actuator shifts into motor operation automatically.

4. Declutch actuator again and repeat Step 3.

7.1.4 Gasket Instructions

All gaskets except the housing cover gasket are 1⁄32" thick ASTM F104 synthetic ﬁber.

The housing gaskets vary in thickness. To determine the correct size, proceed as follows:

1. Clean the Housing Cap (piece #6) and main Housing (piece #1) gasket surface.

2. Install the actuator Drive Sleeve Assembly, including the Bearings.

3. Install the Housing Cap and measure the gap between the Housing Cap and the main Housing.

4. Take measurement and add 10%. Use the closest nominal gasket thickness or combination available.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.1 – SMB-000 Parts Diagram – Side View

102 103

127 128

134 133 75 40

SMB

000

150

82 87 132 7

111

CLOSEOPEN

116

114

117

115

120

129

01-403-0034-3

28 29

113

39156459

129

106

86 30

73 69

60 68

8 33 11 10

17 34 67

8532195

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

108

Figure 7.2 – SMB-000 Parts Diagram – Top View

123

253926465820122105

24 71

250

112

118

63 88

111

CLUTCH FORK ASS'Y

A-A

110

01-403-0033-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Slidewire transmitter

Figure 7.3 – SMB-000 Exploded View

Local dial indicator

Motor operation position

Handwheel operation position

08-403-0001-4

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.1 – SMB-000 Parts List

Piece Quantity Description

1 1 Housing 2 1 Spring Cartridge Cap 3 1 Limit Switch Compartment Cover

4 1 Worm Shaft Bearing Cap

5 1 Handwheel 6 1 Housing Cap 7 1 Declutch Lever 8 1 Drive Sleeve

9 1 Declutch Fork 10 1 Worm Gear 11 1 Stem Nut 14 1 Spacer (Deleted in 1975. Use piece #150) 15 1 Tripper Lever 16 1 Locknut 17 1 Drive Sleeve Bevel Gear

19 1 Bearing Cartridge

20 1 Motor Pinion 21 1 Worm Shaft 22 1 Worm Shaft Gear 23 2 Clutch Key 24 1 Worm 25 2 Clutch Roller Pin 26 1 Tripper Adjustment Arm 27 2 Tripper Cam 28 1 Tripper #1 29 1 Tripper #2 30 1 Locknut 31 1 Cam Spacer 32 1 Seal Cap 33 1 Clutch Ring 34 1 Spacer 35 1 Torque Limit Sleeve 37 1 Cam Spacer 39 2 Clutch Roller 40 1 Declutch Shaft 41 1 Thrust Washer 42 1 Thrust Collar 43 1 Spring Cartridge Cap Cover 44 1 Worm Bearing Nut 45 1 Terminal Mounting Bracket 46 1 Adjustable Arm Pivot Pin 49 1 Belleville Spring (Disc Spring) 50 1 Clutch Compression Spring 51 2 Tripper Spring 53 1 Bearing Shim 56 1 Shim Geared Limit Switch Cartridge Assembly 58 1 Gasket (Motor) 59 1 Gasket (Limit Switch Compartment.) 60 1 Gasket (Housing Cap) 62 1 Gasket (Spring Cartridge Cover) 63 1 Gasket (Spring Cartridge Cap) 66 1 Roller Bearing Cup 67 1 Roller Bearing Cone 68 1 Roller Bearing Cup

Continued on page 46

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.1 – SMB-000 Parts List (continued)

Piece Quantity Description

69 1 Roller Bearing Cone 70 1 Ball Bearing 71 1 Ball Bearing 73 1 Retaining Ring 74 1 Retaining Ring 75 1 Retaining Ring 76 1 Grease Fitting 77 1 Flexloc Nut 78 1 Flexloc Nut 79 1 Roll Pin 81 1 Bushing 82 1 Bushing 85 1 Quad Ring 86 1 Quad Ring 87 1 Quad Ring 88 3 Pipe Plug 90 1 O-Ring 91 1 Terminal Strip 92 1 Motor Assembly 93 1 Torque Switch 95 1 Geared Limit Switch

98 1 Socket Head Set Screw 102 4 Hex Head Cap Screw 103 4 Lockwasher 105 1 Key 106 2 Socket Head Cap Screw 108 1 Guide Sleeve 110 1 Key 111 1 Key 112 1 Key 113 1 Socket Head Cap Screw 114 4 Socket Head Cap Screw 115 4 Lockwasher 116 4 Round Head Machine Screw 117 4 Lockwasher 118 1 Socket Head Set Screw 120 1 Hex Head Cap Screw 122 4 Hex Head Cap Screw 123 4 Lockwasher 127 4 Socket Head Cap Screw 128 4 Lockwasher 129 2 Pipe Plug 132 1 Socket Head Set Screw 133 2 Socket Head Cap Screw 134 2 Lockwasher 150 1 Declutch Shaft Spacer 250 1 Shim

7.2 SMB-00

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

7.2.1 To Replace the Stem Nut Only

c WARNING: Do not remove the locknut (piece #30) with the actuator under load or with valve

under pressure.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

a CAUTION: If valve must be left in service while the stem nut is replaced, the valve stem nut must

be locked in such a way as to prevent any movement of the valve stem.

1. Remove the Locknut (piece #30). The locknut is staked in two places; locate the stakes and spot with a drill.

2. Clean all metal particles.

3. Lift the Stem Nut (piece #8) out of the top of the actuator.

If the actuator is mounted on a valve having a threaded stem, and stem nut removal is required, proceed as follows:

1. Remove the Locknut (piece #30).

2. Declutch actuator for manual operation

3. Rotate the Handwheel (piece #89/99) to close the valve.

4. When the stem nut splines are free from the Drive Sleeve (piece #4), the Stem Nut may be rotated by hand for the remainder of the length of the valve stem and replaced, if necessary.

To re-install the Stem Nut onto the Keyed Shaft:

1. Lower the Stem Nut into the Drive Sleeve, aligning the splines, until the Stem Nut is seated.

2. Install the Key.

3. Install the Locknut.

4. Stake in two (2) places, 180° apart.

To reinstall the Stem Nut onto a Threaded Shaft:

1. Rotate the Stem Nut on the shaft until the Stem Nut splines engage the Drive Sleeve splines.

2. Rotate the Handwheel to open the valve until the Stem Nut is seated.

3. Install the Locknut .

4. Stake the top threads in two (2) places, 180° apart.

7.2.2 SMB-00 Disassembly

Piece numbers refer to Figure 7.4 to 7.7.

1. Verify power to the actuator is OFF.

2. Remove or swing open the Limit Switch Compartment Cover (piece #2).

3. Disconnect the leads of the Geared Limit Switch (piece #85) leads and the Torque Switch (piece #83). Verify the leads are marked for reconnecting to the terminals.

4. Remove the two screws each on the Geared Limit Switch and the Torque Switch. Remove the Geared Limit Switch and the Torque Switch.

5. Remove the motor leads from the Motor Terminal (piece #77) inside the limit switch compartment. Remove the Motor Assembly (piece #84) and guide the motor leads through the conduit opening.

NOTE: The Motor Pinion (piece #20) is keyed to the motor shaft and held there with a set screw to retain the pinion in its proper position.

6. Verify actuator is in motor operation in order to unload tripper level (piece #10) assembly.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

7. Remove Declutch Lever.

8. Remove Spring Cartridge Cap Cover (piece #25).

9. Remove Spring Cartridge Cap (piece #3).

10. Pull the Worm (piece #19) and Belleville Spring assembly (piece #46) directly out.

11. Remove Tripper Lever (piece #10) assembly.

NOTE: A hex head cap screw (piece #173) locates and secures the Tripper Lever on the Declutch Shaft (piece #34) (end of shaft should be ﬂush with tripper lever).

12. For the top-mounted handwheel, remove the Housing Cover (piece #88) and the Handwheel (piece #89) assembly.

13. For the side-mounted handwheel, remove the Bevel Gear Housing (piece #96) and the entire handwheel assembly—including the Bevel Gear Cartridge (piece #98).

14. Remove the Drive Sleeve Assembly completely, including pieces #4, 7, 8, 12, 14, 28, 29, 30, 43, 64, and 66. Press off the Lower Roller Bearing Cone (piece #66). Slide off all remaining pieces except Geared Limit Drive Hypoid Gear (piece #12) and Roller Bearing Cone (piece #64).

15. Remove the Locknut (piece #73) and remove the Worm Shaft Gear (piece #18).

16. Remove the Tripper Cams (piece #24), Bearing Spacer (piece #31), and Cam Spacers (piece #36).

17. Remove the Worm Shaft (piece #17), Bearing (piece #67) and Worm Shaft Bearing Cap (piece #35).

18. Remove the internal Retaining Ring (piece #71). Remove Worm (piece #19) from worm assembly.

19. Remove the Retaining Ring (piece #70) on declutch shaft. Pull the Declutch Shaft (piece #34) and the Declutch Fork (piece #6) out of the actuator from the motor side of the actuator.

20. Press off the Upper Roller Bearing Cone (piece #64). Slide the Geared Limit Drive Hypoid Gear (piece #12) off the Drive Sleeve (piece #4).

7.2.3 SMB-00 Reassembly

a CAUTION: Read gasket instructions 7.2.4 before replacing gaskets.

To reassemble, follow the disassembly procedure in the reverse order, noting the following:

• Step No. 19 of Disassembly procedure—orient the Declutch Fork (piece #6) on the Declutch Shaft

(piece #34) as shown in Figure 7.8 (exploded view).

• Step No. 6 of Disassembly procedure—manually declutch unit and rotate Worm Shaft Gear (piece

#18) to verify proper tripper operation.

Adjust Clutch Trippers

1. Loosen the lock screw (piece #166) on the Tripper Adjustment Arm (piece #21).

2. Hold down the Declutch Lever (piece #5).

3. Lift the Tripper Adjustment Arm up to touch the Trippers (pieces #26, 27). Tighten the lock screw on the Tripper Adjustment Arm.

4. Rotate the Worm Shaft Gear (piece #18) to ensure actuator shifts into motor operation automatically.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

5. Declutch the actuator again and repeat Step 3.

7.2.4 Gasket Instructions

All gaskets except the housing cover gasket are 1⁄32" thick ASTM F104 synthetic ﬁber. The housing gaskets vary in thickness. To determine the correct size, proceed as follows:

1. Clean the Housing Cover (piece #88) and the main Housing (piece #1) gasket surface.

2. Install the unit Drive Sleeve Assembly, including the Bearings.

3. Install the Housing Cover and measure the gap between the Housing Cover and the main Housing.

4. Take measurement and add 10%. Use the closest nominal gasket thickness or combination available.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.4 – SMB-00 Parts Diagram – Motor End View

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.5 – SMB-00 Parts Diagram – Top View

01-403-0090-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

A A

104

105112

90 93

89 95 94 30

107

7 29

572

148

141

Figure 7.6 – SMB-00 Parts Diagram – Side View

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.7 – SMB-00 Parts Diagram – Side Mounted Handwheel Detail

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.8 – SMB-00 Exploded View

Slidewire transmitter

Top-mounted handwheel

Local dial indicator

Side-mounted handwheel

Motor operation

position

Handwheel operation position

08-403-0002-4

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.2 – SMB-00 Parts List

Piece Quantity Description

1 1 Housing

2 1 Limit Switch Compartment Cover

3 1 Spring Cartridge Cap

4 1 Drive Sleeve

5 1 Declutch Lever

6 1 Declutch Fork

7 1 Worm Gear

8 1 Stem Nut

10 1 Tripper Lever

11 1 Locknut

12 1 Geared Limit Drive Hypoid Gear

13 1 Tripper Adjustment Arm Pin

14 2 Clutch Key

15 2 Clutch Fork Roller

16 2 Clutch Roller Pin

17 1 Worm Shaft

18 1 Worm Shaft Gear

19 1 Worm

20 1 Motor Pinion

21 1 Tripper Adjustment Arm

22 1 Seal Retainer Plate

23 1 Terminal Bracket

24 2 Tripper Cam

25 1 Spring Cartridge Cap Cover

26 1 Tripper #1

27 1 Tripper #2

28 1 Clutch Ring

29 1 Worm Gear Spacer

30 1 Locknut

31 1 Bearing Spacer

32 1 Torque Limit Sleeve

34 1 Declutch Shaft

35 1 Worm Shaft Bearing Cap

36 1 Cam Spacer

37 1 Bearing Cartridge

38 1 Thrust Washer

39 1 Thrust Washer

41 1 Tripper Lever Spacer

42 1 Dowel Pin

43 1 Clutch Compression Spring

44 2 Tripper Spring

46 various Belleville Springs

48 2 Pipe Plug - (Only 1 shown)

51 1 Bearing Shims

56 1 Spring Cartridge Cap Gasket

Continued on page 56

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.2 – SMB-00 Parts List (continued)

Piece Quantity Description

57 1 Limit Switch Compartment Cover Gasket

59 1 Motor Adapter Gasket

63 1 Roller Bearing Cup

64 1 Upper Roller Bearing Cone

65 1 Roller Bearing Cup

66 1 Lower Roller Bearing Cone

67 1 Ball Bearing

68 1 Ball Bearing

70 1 Retaining Ring

71 1 Retaining Ring

73 1 Locknut

74 2 Locknut

75 1 Roll Pin

76 1 Bushing

77 1 Motor Terminal Block

78 1 Quad Ring

79 1 Quad Ring

80 1 O-Ring

83 1 Torque Switch

84 1 Motor Assembly

85 1 Geared Limit Switch

88 1 Housing Cover

89 1 Handwheel - Top Mounted

90 1 Housing Cover Gasket

92 1 Retaining Ring

93 1 Grease Fitting

94 1 Quad Ring

95 1 O-Ring

96 1 Bevel Gear Housing

97 1 Bevel Pinion Cap

98 1 Bevel Gear Cartridge

99 1 Handwheel - Side Mounted

100 1 Bevel Gear

101 1 Handwheel Bevel Pinion

102 1 Bearing Spacer

103 1 O-Ring Spacer

104 1 Handle

105 1 Handle Rod

106 1 Bevel Pinion Cap Gasket

107 2 Housing Cover Gasket

109 1 Ball Bearing

110 1 Ball Bearing

111 1 Retaining Ring

112 1 Retaining Ring

113 2 Grease Fitting

114 1 Quad Ring

115 1 O-Ring

Continued on page 57

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.2 – SMB-00 Parts List (continued)

Piece Quantity Description

141 4 Flat Head Machine Screw

143 3 Pipe Plug (Only 1 shown)

144 4 Pipe Plug (Only 3 shown)

148 1 Drive Sleeve Bevel Gear

154 2 Socket Head Cap Screw

156 1 Key

157 6 Socket Head Cap Screw

158 6 Lockwasher

159 4 Lockwasher

160 4 Round Head Machine Screw

162 4 Flat Head Socket Cap Screw

164 1 Key

165 2 Socket Head Set Screw

166 1 Socket Head Cap Screw

167 1 Lockwasher

168 2 Key

169 1 Key

170 1 Socket Head Set Screw

173 1 Hex Head Cap Screw

174 4 Stud

175 4 Hex Nut

176 4 Lockwasher

177 1 Socket Head Set Screw

178 1 Key

7.3 SMB-0, 1, 2, 3 and 4

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

7.3.1 To Replace the Stem Nut Only

c WARNING: Do not remove the Locking Nut (piece #30) with the actuator under load or with valve

under pressure.

a CAUTION: If valve must be left in service while the stem nut is replaced, the valve stem must be

locked in such a way as to prevent any movement of the valve stem.

1. Remove Locking Nut (piece #30). The locking nut is staked in two places; locate the stakes and spot with a drill.

2. Clean all metal particles.

3. Lift Stem Nut (piece #20) out of the top of the actuator.

If the actuator is mounted on a valve having a threaded stem, and stem nut removal is required, proceed as follows:

1. Remove Locking Nut (piece #30).

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

2. Rotate the Handwheel (piece #5) to close the valve.

3. When the stem nut splines are free from the Drive Sleeve (piece #11), the Stem Nut may be rotated by hand for the remainder of the length of the valve stem and replaced, if necessary.

4. On new stem nut, stake the top threads in two places. Install stem nut.

To reinstall the Stem Nut onto the Keyed Shaft:

1. Lower the Stem Nut into the Drive Sleeve, aligning the splines, until the Stem Nut is seated.

2. Install the Key.

3. Install the Locknut.

4. Stake in two (2) places, 180° apart.

To reinstall the Stem Nut onto a Threaded Shaft:

1. Rotate the Stem Nut on the shaft until the Stem Nut splines engage the Drive Sleeve splines.

2. Rotate the Handwheel to open the valve until the Stem Nut is seated.

3. Install the Locknut.

4. Stake the top threads in two (2) places, 180° apart.

See Gasket Instructions on next page.

7.3.2 SMB-0, 1, 2, 3 and 4 Disassembly

Piece numbers refer to Figures 7.9 to 7.11.

1. Verify power to the actuator is OFF.

2. Remove or swing open the Limit Switch Compartment Cover (piece #6).

3. Disconnect the Geared Limit Switch (piece #105) leads and the Torque Switch (piece #104) leads. Verify the leads are marked for reconnecting to the terminals.

4. Remove the two screws each on the geared limit switch and the torque switch. Remove the Geared Limit Switch and the Torque Switch.

5. Disconnect the motor leads inside the limit switch compartment. Remove the Motor (piece #103) and guide the motor leads through the conduit opening.

NOTE: The Motor Pinion (piece #40) is keyed to the motor shaft and held there with a set screw and lockwire to retain the pinion in its proper position. The motor pinion should be shouldered on the motor shaft.

6. Depress Declutch Lever (piece #10) to put the actuator in manual operation.

7. Loosen set screw and pull Handwheel (piece #5) and Spacer (piece #201) from Handwheel Shaft (piece #25).

8. Loosen set screw and slide Declutch Lever (piece #10) from Declutch Shaft (piece #24).

9. Remove Spring Cartridge Cap (piece #4).

a CAUTION: The Declutch lever shaft must be held in position and not allowed to be pulled out

when removing the spring cartridge cap. A loud snap will be heard on removal of this end cap—this is the sound of the Torsion Spring (piece #54) being released. Do not be alarmed. Later models have declutch lever shaft held in place by a snap ring located behind the Declutch Link (piece #9).

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

10. Temporarily replace the Handwheel (piece #5) and rotate in the close direction to cause the Worm (piece #53) to screw out of engagement with Worm Gear (piece #16) and to cause Torque Spring assembly (piece #29, 44, 45, 48, 56) to emerge from the Housing (piece #2). Remove Worm and Torque Spring assembly completely.

NOTE: The cartridge may be further disassembled. See separate disassembly instructions below.

11. Remove Housing Cover (piece #3).

12. Remove Drive Sleeve Assembly completely from the actuator Housing (piece #2). The drive sleeve assembly consists of Locking Nut (piece #30), Stem Nut (piece #20), Drive Sleeve (piece #11), Upper Thrust Bearings (piece #77 , 78), Worm Gear (piece #16), Worm Gear Spacer (piece #28), and Lower Roller Bearing Cone (piece #75). Press off the Lower Roller Bearing Cone (piece #75) to further dismantle the drive sleeve assembly.

13. Remove Retaining Ring (piece #89), Split Ring Retainer (piece #27), and Split Ring (piece #47). Pull the Worm Shaft Clutch Gear (piece #41) from the Worm Shaft (piece #43).

14. Remove Clutch Gear Spacer (piece #46)—only on SMB-0 and SMB-1.

15. Spread Clutch Trippers (piece #32) with a tool to shift the actuator into motor operation.

a CAUTION: Do not use hands. Spring forces could cause personal injury.

16. Remove bolts holding Clutch Housing (piece #1) to Housing (piece #2). Withdraw Clutch Housing together with the Trippers (piece #32), and Declutch Fork (piece #12). Worm Shaft Clutch (piece #50) will slide off Worm Shaft (piece #43).

17. Slide Fork Return Spring (piece #58) off of Worm Shaft toward motor end. Slide Declutch Link (piece #9) off splined Declutch Shaft (piece #24). Remove Retaining Ring (piece #73).

18. Remove Elastic Stop Nut (piece #84) and remove Handwheel Gear (piece #7), which is keyed to the Handwheel Shaft (piece #25).

19. Remove bolts holding Worm Shaft Bearing Cap Assembly (piece #8) and slide cap off the Worm Shaft. Retaining Ring (piece #92), Handwheel Pinion Spring (piece #57), Spring Ring (piece #17), and Handwheel Clutch Pinion (piece #42) are part of the Worm Shaft Bearing Cup Assembly.

20. Remove the Bearing (piece #81) and Worm Shaft (piece #43) assembly from the Housing (piece #2).

21. Tap on the motor end of the handwheel shaft, which will free Bearing (piece #80) from Housing to remove handwheel shaft. Handwheel Shaft (piece #25) will break free from Bearing (piece #79). Remove Handwheel Shaft (piece #25) from Housing.

7.3.3 Worm and Torque Spring Disassembly

1. Withdraw Declutch Shaft (piece #24) from handwheel end of Housing.

2. Remove Elastic Stop Nut (piece #85), noting the number of turns to remove it.

3. Remove Thrust Washers (piece #48), Torque Limit Sleeve (piece #29), and Belleville Springs (piece #56).

NOTE: Note the orientation of the Belleville Springs for reassembly later.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4. Locate screw in threaded area of the Bearing Cartridge Stem (piece #45) and remove. Remove Bearing Cartridge Stem.

5. Remove the Worm (piece #53) and the Ball Bearing (piece #82).

6. Locate set screw in Bearing Locknut (piece #83). Remove set screw and Bearing Locknut. Remove the Ball Bearing (piece #82).

7.3.4 SMB-0, 1, 2, 3 and 4 Reassembly

a CAUTION: Read gasket instructions before replacing gaskets.

To reassemble, follow the disassembly procedure in the reverse order, noting the following:

• Step #24 of Disassembly procedure—stack Belleville Springs (piece #56), Thrust Washers (piece

#48), and Spacers in the exact order as they were removed.

• Step #23 of Disassembly procedure—reinstall Elastic Stop Nut (piece #85) with the same number

of turns as was used to remove.

• Step #17 of Disassembly procedure—align Declutch Link (piece #9) with Declutch Lever (piece

#10) to assure correct lever positioning.

• Step #16 of Disassembly procedure—install the Worm Shaft Clutch (piece #50) with smaller set of

lugs ﬁrst to engage with lugs on Handwheel Clutch Pinion (piece #42).

• Step #10 of Disassembly procedure—rotate Worm Shaft Clutch (piece #50) to engage splines on

Worm Shaft (piece #43) to replace Worm (piece #53). Replace Declutch Lever (piece #10) and Handwheel (piece #5) temporarily. Rotate handwheel in opposite direction used to remove Worm to place actuator in manual operation and to thread the Worm into engagement with the Worm Gear (piece #16).

• Step #9 of Disassembly procedure—before replacing Spring Cartridge Cap (piece #4), align

Torsion Spring (piece #54), which holds the Declutch Lever in its normal position. Remove Declutch Lever (piece #10) and replace Spring Cartridge Cap (piece #4), and Spring Cartridge Plate with Gasket (piece #71, 72). Do not bolt tightly. Depress Declutch Lever into manual operation and, while holding down Declutch Lever, secure Spring Cartridge Cap (piece #4).

• Step #5 of Disassembly procedure—ensure the Motor Pinion (piece #40) is a tight ﬁt on the motor

shaft (preferably a light press ﬁt).

NOTE: The SMB-0 Motor Pinion (piece #40) is installed with the set screw lockwire between the gear teeth and the motor ﬂange. On the SMB-1 through 4, the gear teeth are between the set screw/ lockwire and ﬂange.

7.3.5 Gasket Instructions

All gaskets except the housing cover gasket are 1⁄32" thick ASTM F104 synthetic ﬁber. The housing gaskets vary in thickness. To determine the correct size, proceed as follows:

1. Clean Housing Cover (piece #3) and main Housing (piece #2) gasket surface.

2. Install unit Drive Sleeve assembly, including the Bearings (piece #11, 20, 30, 16, 28, 74, 75-78).

3. Install Housing Cover and measure the gap between the Housing Cover and the main Housing.

4. Take measurement and add 10%. Use the closest nominal gasket thickness or combination available.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.9 – SMB-0 through SMB-4 Parts Diagram – Top View

01-408-0073-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.10 – SMB-0 through SMB-4 Parts Diagram – Worm Shaft Side View

01-408-0074-4

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.11 – SMB-0 through SMB-4 Parts Diagram – Drive Sleeve Side View

01-408-0013-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

To declutch

Position indicator

gearing Handwheel operation position

Motor operation

position

Position indicator gearing

Local dial indicator

Slidewire Transmitter

Set

screw

Lockwir e

SMB-0 pinion

08-408-0001-4

Figure 7.12 – SMB-0 through SMB-4 Exploded View

08-408-0001-4

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.3 – SMB-0 through SMB-4 Parts List

Piece Quantity Description

1 1 Clutch Housing

2 1 Housing

3 1 Housing Cover

4 1 Spring Cartridge Cap

5 1 Handwheel

6 1 Limit Switch Compartment Cover

7 1 Handwheel Gear

8 1 Worm Shaft Bearing Cap

9 1 Declutch Link

10 1 Declutch Lever

11 1 Drive Sleeve

12 1 Declutch Fork

16 1 Worm Gear

17 1 Spring Ring

18 1 Motor Clutch Gear Bushing

19 1 Worm Bushing

20 1 Stem Nut

24 1 Declutch Shaft

25 1 Handwheel Shaft

26 1 Seal Retainer Plate

27 1 Split Ring Retainer

28 1 Worm Gear Spacer

29 1 Torque Limit Sleeve

30 1 Locking Nut

31 1 Motor Conduit Nipple

32 2 Clutch Tripper #1 & #2

34 1 Fork Pivot Pin

35 1 Handle

36 1 Handle Rod

37 1 Drum

38 1 Upper Hinge

39 1 Lower Hinge

40 1 Motor Pinion

41 1 Worm Shaft Clutch Gear

42 1 Handwheel Clutch Pinion

43 1 Worm Shaft

44 1 Bearing Cartridge Cap

45 1 Bearing Cartridge Stem

46 1 Clutch Gear Spacer (SMB-0 and 1) (Ref. Figure 7.9)

46 1 Flat Washer, H.W. Shaft, (SMB-0 through 4) (Ref. Figure 7.10)

47 1 Split Ring

48 2 Thrust Washer

49 2 Clutch Roller

50 1 Worm Shaft Clutch

51 1 Cam Tripper Pin

Continued on page 66

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.3 – SMB-0 through SMB-4 Parts List (continued)

Piece Quantity Description

52 2 Clutch Roller Pin

53 1 Worm

54 1 Torsion Spring

55 1 O-Ring Spacer (SMB-1, 2)

56 various Belleville Springs

57 1 Handwheel Pinion Spring

58 1 Fork Return Spring

59 1 Tripper Spring (SMB-0, 1, 2)

60 1 Nameplate

63 1 Tripper Spring (SMB-3 and 4)

66 1 Housing Cover Gasket

67 1 Clutch Housing and Motor Gasket

68 1 Spring Cartridge Cap Gasket

69 1 Limit Switch Compartment Cover Gasket

70 1 Locknut

71 1 Spring Cartridge Cap Plate (SMB-0, 1, 2 only)

72 1 Spring Cartridge Cap Plate Gasket (SMB-0, 1, 2 only)

73 1 Retaining Ring

74 1 Bearing Shims

75 1 Declutch Arm (SMB-4) (Ref. piece #9, Figure 7.10)

75 1 Lower Roller Bearing Cone

76 1 Lower Roller Bearing Cup

77 1 Upper Roller Bearing Cone

78 1 Upper Roller Bearing Cup

79 1 Ball Bearing

80 1 Bearing (SMB-0, 1, 2)

80 1 Bushing, Handwheel Shaft (SMB-3 and 4)

81 1 Ball Bearing

82 1 Ball Bearing

83 1 Bearing Locknut

84 1 Elastic Stop Nut

85 1 Elastic Stop Nut

86 1 Retaining Ring (SMB-0, 1, 2, 3)

86 2 Fork Spacer (SMB-4) (Not shown)

87 1 Retaining Ring (SMB-1, 2, 3 only)

88 1 Retaining Ring

89 1 Retaining Ring

90 1 Retaining Ring

91 2 Retaining Ring

92 1 Retaining Ring

93 1 Quad Ring

94 1 Quad Ring

95 1 O-Ring

96 1 O-Ring (SMB-1, 2 only)

96 1 Oil Seal (SMB-3 and 4)

Continued on page 67

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.3 – SMB-0 through SMB-4 Parts List (continued)

Piece Quantity Description

97 1 Bushing

98 1 Grease Fitting

103 1 Motor

104 1 Torque Switch

105 1 Geared Limit Switch

140 1 Terminal Strip

141 1 Terminal Strip Mounting Bracket

175 2 Socket Head Cap Screw

176 2 Lockwasher

179 8 Hex Head Cap Screw

180 8 Lockwasher

181 2 Socket Head Set Screw

183 1 Roll Pin, Spr. Cartridge Cap, (Ref. Figure 7.9)

183 5 Socket Head Cap Screw (Ref. Figure 7.10)

184 1 Roll Pin

185 1 Key

187 1 Roll Pin

188 1 Declutch Shaft Journal

189 1 Socket Head Set Screw

190 4 Socket head Cap Screw

191 4 Lockwasher

192 1 Thrust Washer (SMB-0 only)

193 2 Socket Head Shoulder Screw

194 2 Dowel Pin, Clutch Housing (SMB-2 through 4)

194 1 Key, Handwheel Gear

195 1 Key

196 4 Hex Head Cap Screw

197 4 Lockwasher

201 1 Handwheel Shaft Spacer

203 1 Socket Head Set Screw

206 1 Clutch Tripper Insert (SMB-0 only)

241 1 Handwheel Bearing Cap (SMB-4) (Not shown)

7.4 SMB-5 (Thrust and Torque) and SMB-5T (Torque Only)

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

7.4.1 SMB-5 and SMB-5T Disassembly

Piece numbers refer to Figures 7.13, 7.14, and 7.15.

1. Remove Drive Sleeve Locknut (piece #130).

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

a CAUTION: The SMB-5 drive sleeve locknut has left-hand threads and must be rotated clockwise

to remove.

2. Rotate the Handwheel (piece #10) to close valve, causing the Stem Nut (piece #127) to rise up the threaded valve stem until the stem nut splines are free of the Drive Sleeve (piece #126).

3. Rotate the Stem Nut (piece #127) by hand for the remaining length of the valve stem and remove.

4. Remove the Limit Switch Compartment Cover (piece #12) and disconnect all external electrical leads to the actuator.

NOTE: Ensure all motor and control leads are labeled for reassembly.

5. Remove the actuator from the valve if required to facilitate disassembly.

6. Disconnect motor leads and leads between the Torque Switch (piece #116) and Geared Limit Switch (piece #117).

7. Remove Torque Switch (piece #116) and Geared Limit Switch (piece #117).

8. Remove Handwheel Washer (piece #60) and remove the Handwheel (piece #10) and the Handwheel Clutch (piece #13) from the Handwheel Shaft and Pinion (piece #40).

SMB-5 Thrust Housing Only

1. Remove Thrust Adapter Housing (piece #125) assembly from the Housing (piece #1).

NOTE: If disassembly of the thrust adapter assembly is not required, continue to Step 2.

a. Remove the Seal Retainer Plate (piece #129) and the Oil Seal (piece #132).

b. Loosen the set screw and remove the Thrust Bearing Cartridge (piece #128) from the Thrust

Adapter Housing (piece #125).

c. Remove the Upper Bearing Roller Assembly (piece #131).

d. Lift the Thrust Drive Sleeve (piece #126) out of the Thrust Adapter Housing (piece #125).

e. Remove the Lower Bearing Roller Assembly (piece #131).

SMB-5T Torque Housing

1. Using lifting eye bolts, remove Housing Cover (piece #3).

2. Remove the Torque Drive Sleeve (piece #11) and the Worm Gear (piece #17) in this order.

3. Remove Motor (piece #115) and Motor Adapter (piece #5).

NOTE: Record the thickness of gaskets for reassembly.

4. Remove the Intermediate Pinion and Shaft (piece #15) and Motor Drive Intermediate Gear (piece #41) as an integral assembly.

NOTE: Record the location and the thickness of gearing shims in the housing.

5. Remove the Output Worm Shaft Gear (piece #42) and the Bearing Spacer (piece #64).

6. Punchmark Worm Shaft End Cap (piece #7) before removing the cap.

7. Remove the Worm Shaft End Cap (piece #7).

NOTE: Record the gasket thickness for Declutch Housing Cover (piece #4) for reassembly.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

8. Remove declutch assembly as follows:

a. Clean grease from assembly as much as possible.

b. Scribe an alignment mark on all parts and shaft for use during reassembly.

c. Remove the Declutch Lever Stop (piece #28), Tripper Spring (piece #67), Clutch Tripper #1 and

#2 (piece #33 and #34), and Roll Pin (piece #110).

d. Loosen set screws on Declutch Lever (piece #9) and Collar (piece #103).

e. Remove the Declutch Lever (piece #9), Declutch Cap (piece #59), and slide the Declutch Shaft

(piece #30) out through the bottom of the Declutch Housing (piece #2), while removing the Declutch Fork (piece #14) and other Declutch Shaft Mounted Components (piece #66, 70, 69, and #103) from the Declutch Shaft (piece #30).

9. Remove the Handwheel Shaft and Pinion (piece #40), noting how many and which spacers go on either side of the Declutch Fork (piece #14).

10. Remove the Solid Drive Shaft (piece #43) and the Flexible Jaw Clutch assembly (pieces 50, 73, 74, 75, 76, 97, and 98) as an integral assembly, Gear Clutch Spacer (piece #47), Sliding Clutch Gear (piece #51), and Clutch Compression Spring (piece #68).

11. Remove Splined Insert (piece #54) using jack screws, Spirolox Ring (piece #107), and Handwheel Gear (piece #6).

12. Remove Gear Mounting Bracket (piece #8) using jackscrews, Bearing (piece #93), and Bearing Adapter (piece #65).

13. Pull Hollow Drive Shaft (piece #55) toward declutch end and remove Spirolox Ring (piece #106).

c WARNING: Declutch Housing is under torque spring load.

14. Remove Declutch Housing (piece #2) by loosening the two cap screws evenly and in turn to allow gradual release of the torque spring preload.

15. Push Hollow Drive Shaft (piece #55) toward the Motor (piece #115) end, loosen set screw, and remove Bearing Locknut (piece #99).

NOTE: Hold hollow drive shaft using adjustable spanner on splines.

a. Remove Bearing (piece #95) by pushing Hollow Drive Shaft (piece #55) toward declutch end.

b. Remove Geared Limit Threaded Collar (piece #32) and key.

c. Remove Hollow Drive Shaft (piece #55) from declutch end of the Housing (piece #1).

16. Loosen set screw in Cartridge Stem Locking Nut (piece #48) and temporarily replace Declutch Housing (piece #2) with two screws to compress the torque spring.

c WARNING: Declutch Housing is under spring load.

17. Remove Cartridge Stem Locking Nut (piece #48).

18. Remove Declutch Housing (piece #2) by loosening the two cap screws evenly and in turn to allow gradual release of the torque spring preload.

19. Pull Bearing Cartridge Stem (piece #45) out partially and remove the Thrust Washers (piece #46), Torque Limit Sleeve (piece #62), and Belleville Springs (piece #58).

20. Remove bearing cartridge/worm assembly from the Housing (piece #1).

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

a. Loosen two set screws on Bearing Cartridge Cap (piece #44) and unscrew Bearing Cartridge

Stem (piece #45).

21. Slide Bearing Cartridge Cap (piece #44) off toward Worm (piece #56) threads.

22. Loosen set screw and remove Bearing Locknut (piece #100).

23. Press off two Bearing Cone and Cups (pieces #90 and #91).

NOTE: Cups and cones are sets. They must remain together, in sets.

7.4.2 SMB-5 and SMB-5T Reassembly

Piece numbers refer to Figures 7.13, 7.14, and 7.15.

NOTE: Clean the housing and all parts before reassembly. During reassembly ensure that same thickness gaskets and shims are installed as were removed during disassembly.

SMB-5T (Torque Housing)

1. Press two Bearing Cone and Cups (piece #90 and 91) onto Worm (piece #56), ensuring that bearing races are matched. Ensure the Bearing Spacer (piece #92) is installed.

2. Install Bearing Locknut (piece #100) and tighten set screw.

3. Apply heat to the Bearing Cartridge Cap (piece #44) and install onto the Bearing Cone and Cup (piece #90, #91) from the Worm (piece #56) end. Ensure that the Bearing Cartridge Cap seats on the Bearing .

4. Thread the Bearing Cartridge Stem (piece #45) tightly into the Bearing Cartridge Cap and tighten two set screws.

5. Install Bearing Cartridge/Worm Assembly in Housing (piece #1).

6. Replace the Belleville Spring Assembly components in the following order: Thrust Washer (piece #46), the six Belleville Springs (piece #58) (stacked as shown), Torque Limit Sleeve (piece #62), and the second Thrust Washer (piece #46).

NOTE: Ensure that the non-beveled ﬂat side of thrust washer is against the springs. Springs stack this way: ( )( )( ).

7. Thread Cartridge Stem Locking Nut (piece #48) onto the Bearing Cartridge Stem (piece #45) by hand.

8. Install Hollow Drive Shaft (piece #55).

a. Install Geared Limit Threaded Collar (piece #32) and key on motor end of Hollow Drive Shaft

with threaded end toward Worm (piece #56).

b. Slide Bearing (piece #95) onto Hollow Drive Shaft (piece #55).

c. Thread Bearing Locknut (piece #99) onto the Hollow Drive Shaft. Align the set screw hole with

the drilled “spot” on the shaft. Install and tighten set screw. (Hold drive shaft using adjustable spanner on splines.)

9. Push Hollow Drive Shaft (piece #55) to declutch end and install Bearing Spacer (piece #64).

10. Install the Output Worm Shaft Gear (piece #42) and Intermediate Pinion and Shaft (piece #15).

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

11. Install motor gearing shims in Motor Adapter (piece #5) bearing bores and install the Motor Adapter Gasket (piece #84) and Motor Adapter (piece #5). Tap the Motor Adapter to ensure that the bearings seat.

12. Check Intermediate Pinion and Shaft (piece #15) for proper shims. Shaft should rotate freely with no axial movement. Use original shims or provide new shims that are the same thickness as measured at disassembly.

13. Install Motor (piece #115).

14. Install Spirolox Ring (piece #106) on the Hollow Drive Shaft (piece #55).

15. Install Declutch Housing (piece #2) using two screws only to compress the Belleville Springs (piece #58). DO NOT install gasket.

16. Using two screws, thread Cartridge Stem Locking Nut (piece #48) on the Bearing Cartridge Stem (piece #45) until the Locking Nut is snug against the Thrust Washer (piece #46).

17. Remove the Declutch Housing (piece #2) and make sure the set screw hole is aligned with the spot mark on the Bearing Cartridge Stem threads. Tighten Cartridge Stem Locking Nut set screw.

18. Reinstall Declutch Housing with Gasket (piece #80).

19. Install Gear Mounting Bracket Assembly (pieces #8, #65, and #93).

20. Install Handwheel Gear (piece #6) and Spirolox Ring (piece #107).

21. Install Splined Insert (piece #54), Spring Washer (piece #61), and Clutch Compression Spring (piece #68).

22. Install Sliding Clutch Gear (piece #51) onto Hollow Drive Shaft (piece #55) splines.

23. Install Solid Drive Shaft (piece #43), ensuring that the Clutch Gear Spacer (piece #47) is in place. Align splines on the Solid Drive Shaft and Output Worm Shaft Gear and push the Drive Shaft into the Housing (piece #1) from the declutch end.

24. Mount Handwheel Shaft Bearings (pieces #94 and #97) on the Handwheel Shaft and Pinion (piece #40) and install assembly into the Housing.

25. Install the Declutch Shaft (piece #30) and Torsion Spring (piece #57) into the Declutch Cap (piece #59).

26. Install Declutch Shaft Assembly through the bottom of the Declutch Housing (piece #2).

a. The Declutch Shaft Assembly consists of Declutch Shaft (piece #30), Torsion Spring (piece

#57), Declutch Cap (piece #59), Drum (piece #27), Declutch Arm (piece #66), Declutch Shaft Washers (piece #70, three pieces), Declutch Fork (piece #14), Declutch Shaft Spacer (piece #69), Collar (piece #103), and Gasket (piece #81).

27. Align scribe marks.

NOTE: Declutch shaft must be installed with keyseat facing right side of declutch housing when viewed from the declutch end of the actuator.

28. Fasten Declutch Cap (piece #59). Observe punch marks.

29. Insert Roll Pin (piece #110) through the Declutch Arm (piece #66) and Declutch Shaft (piece #30).

30. Ensuring that the declutch shaft bottoms against the declutch cap, push the Collar (piece #103) against the top of the housing and tighten the collar set screw.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

NOTE: Ensure that the Oil Seal (piece #105) is properly installed.

31. Install the Declutch Lever (piece #9) and tighten the set screw.

32. Rotate the Declutch Lever clockwise, hold in position, and install the Declutch Lever Stop (piece #28).

33. Install Clutch Trippers (piece #33 and 34) and the Tripper Spring (piece #67).

34. Install the Declutch Housing Cover (piece #4) and Gasket (piece #82).

NOTE: Ensure that Handwheel Oil Seal (piece #108) is in place.

35. Install Worm Shaft End Cap (piece #7) and Gasket (piece #83).

a CAUTION: Ensure that the same number of gaskets are installed as were removed during disas-

sembly. Thickness of gaskets must be sufﬁcient to prevent the end cap from bearing on the drive shaft.

36. Install the Worm Gear (piece #17).

37. Install Torque Drive Sleeve (piece #11) and Drive Sleeve Thrust Bearing (pieces #139 and 140).

38. Apply fresh, clean lubricant in the actuator Housing to 1½” from top.

39. Install the Housing Cover Gasket (piece #79) and the Housing Cover (piece #3).

SMB-5 (Thrust Housing)

NOTE: If the thrust Adapter Housing (piece #125) assembly was not disassembled, continue to Step

NOTE: Thrust bearing races should be pressed on the Thrust Drive Sleeve (piece #126), in the Thrust Adapter Housing (piece #125), and the Thrust Bearing Cartridge (piece #128) prior to beginning reassembly procedure.

1. Install the Lower Thrust Bearing (piece #131) in the Thrust Adapter Housing (piece #125).

2. Install the short end of the Thrust Drive Sleeve (piece #126) into the Thrust Adapter Housing (piece #125).

3. Install the Upper Thrust Bearing (piece #131) on the Thrust Drive Sleeve (piece #126).

4. Install the Thrust Bearing Cartridge (piece #128), thread in tight or until drag is felt on Thrust Drive Sleeve, and tighten set screw.

5. Install Oil Seal (piece #132) and Seal Retainer Plate (piece #129).

6. Lift the actuator or turn upside down and install Thrust Adapter Housing (piece #125).

NOTE: Ensure that the Thrust Drive Sleeve O-Ring (piece #134) is in place.

7. Install Stem Nut (piece #127).

8. Install Drive Sleeve Locknut (piece #130) and crimp or stake the top threads in two places.

a CAUTION: The SMB-5 drive sleeve locknut has left-hand threads and must be rotated counter-

clockwise to install.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

SMB-5 and 5T

1. Install Torque Switch (piece #116) and Geared Limit Switch (piece #117).

2. Connect motor leads and the leads to the Torque Switch and Geared Limit Switch.

3. Install Handwheel Clutch (piece #13), Handwheel (piece #10), and Handwheel Washer (piece #60) on the Handwheel Shaft and Pinion (piece #40).

4. Install valve operator on valve.

a CAUTION: The geared limit switch must be reset before energizing electrical power to the valve

operator and attempting motor operation.

5. Connect all external electrical leads to the actuator.

6. Follow geared limit switch setting procedure to reset the Geared Limit Switch (piece #117).

7. Install the Limit Switch Compartment Cover (piece #12).

8. Re-energize all electrical power to the actuator.

Figure 7.13 – SMB-5 and 5T Parts Diagram

01-413-0037-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

NOTE: Serial numbers through 277159 use Part #18. Serial numbers 277160 and higher use Part #139 and #140.

Figure 7.14 – SMB-5 and 5T Parts Diagram– Top View

01-413-0036-4

NOTE: PC# 90, 91, 92 are sold as an assembly only.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.15 – SMB-5 and 5T Parts Diagram – Declutch Housing Detail

01-413-0037-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 7.16 – SMB-5 and 5T Exploded View

08-408-0002-4

08-408-0002-04

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.4 – SMB-5 and 5T Parts List

Piece Quantity Description

1 1 Housing

2 1 Declutch Housing

3 1 Housing Cover

4 1 Declutch Housing Cover

5 1 Motor Adapter

6 1 Handwheel Gear

7 1 Worm Shaft End Cap

8 1 Gear Mounting Bracket

9 1 Declutch Lever

10 1 Handwheel

11 1 Torque Drive Sleeve

12 1 Limit Switch Compartment Cover

13 1 Handwheel Clutch

14 1 Declutch Fork

15 1 Intermediate Pinion and Shaft

17 1 Worm Gear

18 1 Drive Sleeve Bushing

19 1 Drive Sleeve Thrust Bearing

20 1 Worm Bushing

21 1 Handwheel Gear Bushing

22 1 Retaining Ring

23 1 Gear Insert

24 2 Split Ring

25 1 Spirolox Ring

27 1 Declutch Shaft Drum

28 1 Declutch Lever Stop

30 1 Declutch Shaft

31 2 Tripper Bolt

32 1 Geared Limit Threaded Collar

33 1 Clutch Tripper #1

34 1 Clutch Tripper #2

35 1 Handle Rod

36 1 Handle

37 1 Upper Hinge

38 1 Lower Hinge

39 1 Motor Pinion

40 1 Handwheel Shaft and Pinion

41 1 Motor Drive Intermediate Gear

42 1 Output Worm Shaft Gear

43 1 Solid Drive Shaft

44 1 Bearing Cartridge Cap

45 1 Bearing Cartridge Stem

46 1 Thrust Washer

47 1 Clutch Gear Spacer

48 1 Cartridge Stem Locking Nut

Continued on page 78

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.4 – SMB-5 and 5T Parts List (continued)

Piece Quantity Description

49 2 Fork Roller

50 1 Flexible Jaw Clutch Housing

51 1 Sliding Clutch Gear

52 1 Motor Clutch Gear Cam Pin

53 2 Fork Roller Pin

54 1 Splined Insert

55 1 Hollow Drive Shaft

56 1 Worm

57 1 Torsion Spring

58 various Belleville Springs

59 1 Declutch Cap

60 1 Handwheel Washer

61 1 Spring Washer

62 1 Torque Limit Sleeve

63 1 Handwheel Gear Spacer

64 1 Bearing Spacer

65 1 Bearing Adapter

66 1 Declutch Arm

67 1 Tripper Spring

68 1 Clutch Compression Spring

69 1 Declutch Shaft Spacer

70 3 Declutch Shaft Washer

71 1 Declutch Lever Name Plate

72 1 Stop Stud

73 1 Flexible Jaw Clutch Sleeve

74 1 Flexible Jaw Clutch Collar

75 1 Nylon Insert

76 6 Clutch Sleeve Insert

79 1 Housing Cover Gasket

80 1 Declutch Housing Gasket

81 1 Declutch Cap Gasket

82 1 Declutch Cover Gasket

83 1 Worm Shaft End Cap Gasket

84 1 Motor Adapter Gasket

85 1 Motor Gasket

86 1 Limit Switch Cover Gasket

90 1 Bearing Cone

91 1 Bearing Cup

92 1 Bearing Spacer

93 1 Bearing

94 1 Handwheel Shaft Bearing

95 2 Bearing

96 2 Bearing

97 1 Bearing

98 1 Bearing Locknut

Continued on page 79

Continued on page 78

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 7.4 – SMB-5 and 5T Parts List (continued)

Piece Quantity Description

99 1 Bearing Locknut

100 1 Bearing Locknut w/Cup Point

101 1 Roll Pin

102 1 Retaining Ring

103 1 Collar

104 1 Quad Ring

105 1 Oil Seal

106 1 Spirolox Ring

107 1 Spirolox Ring

108 1 Oil Seal

109 1 Groove Pin

110 1 Roll Pin

111 1 Grease Fitting

112 1 Welsh Plug

115 1 Motor

116 1 Torque Switch

117 1 Geared Limit Switch

125 1 Thrust Adapter Housing

126 1 Thrust Drive Sleeve

127 1 Stem Nut

128 1 Thrust Bearing Cartridge

129 1 Seal Retainer Plate

130 1 Drive Sleeve Locknut

131 2 Bearing Roller Assembly

132 1 Oil Seal

133 1 Grease Fitting

134 1 O-Ring

135 1 Gasket

136 1 Gasket

137 1 Threaded Flange

138 1 Sealing Washer

139 1 Bearing Cup

140 1 Bearing Cone

141 As required Bearing Shim

142 1 Bearing Spacer

215 1 Seal Retainer Sleeve

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

SB Disassembly and Reassembly

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

c WARNING: Extreme caution should be used in the disassembly and reassembly of the spring

compensator assembly. The compensator springs may be compressed (under load) even though the line pressure has been removed from the valve and power is disconnected. Be sure that the spring compensator indicator in the Spring Housing points to zero before beginning disassembly. Remove the Spring Housing bolts by turning each bolt in order around the housing no more than ¼ turn at a time.

8.1 SB-00

The SB-00 actuator is a basic SMB-00 actuator with the housing cover, drive sleeve and locknut modiﬁed to provide spring compression to the stem nut. The disassembly/reassembly procedure for the SMB-00 is applicable (Sections 7.2.2, SMB-00 Disassembly and Section 7.2.3, SMB-00 Reassembly, with the following procedures replacing Step No. 13 and the stem nut removal procedure.

8.1.1 SB-00 Disassembly/Stem Nut Removal

Piece numbers refer to Figure 8.1.

1. Remove Spring Housing Cover (piece #121).

2. Remove Locking Nut (piece #125). Note that the Set Screw (piece #126) must be loosened before the Locknut can be removed.

3. Lift the Spring Cartridge (piece #123). Try to keep cartridge straight to aid in its removal. The Belleville Springs (piece #108), Thrust Washer (piece #124), and Thrust Limiter Sleeve (piece #119) (where applicable) will come out with the Spring Cartridge.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

NOTE: Note the arrangement of the Belleville Springs.

4. If the actuator is mounted on the valve, place the actuator in manual operation. Rotate the Handwheel (piece #99) in the direction to effect a downward movement of the stem (usually the closed direction) until the compensator Ball Bearing (piece #81) stops rising.

5. Lift out the Thrust Adapter Sleeve (piece #120), and Bearing (piece #81).

6. If the actuator is not on a valve, the Stem Nut (piece #8) will lift out.

7. Remove Bevel Gear Housing (piece #96) as an assembly complete with side-mounted handwheel assembly.

8. To remove Drive Sleeve Assembly, proceed as in Section 7.2.2, SMB-00 Disassembly.

8.1.2 SB-00 Reassembly/Stem Nut Installation

Piece numbers refer to Figure 8.1.

1. If actuator is not on the valve, drop the Stem Nut (piece #8) in place and ensure that splines engage properly.

2. If actuator is on the valve, thread the Stem Nut onto the stem until the splines hit.

3. Replace the Bevel Gear Housing (piece #96) assembly as removed in Step 7 of Section 8.1.1, SB-00 Disassembly/Stem Nut Removal.

4. Place the actuator in manual operation and rotate the Handwheel (piece #99) in the direction to effect an upward movement of the stem (usually the opening direction). Continue rotating until the stem begins to move upward.

5. Remove Bevel Gear Housing (piece #96).

6. Install Thrust Adapter Sleeve (piece #120) and Bearing (piece #81). Ensure O-Ring (piece #116) is properly installed.

7. Clean the bottom surface of the mounting ﬂange for the Bevel Gear Housing (piece #96) and Housing (piece #1).

8. Place Bevel Gear Housing in position without any gasket between it and the Housing (piece #1).

9. Measure the gap between the Bevel Gear Housing and the Housing.

10. Install Bevel Gear Housing Gasket (piece #107) of the same thickness as the gap measured in Step 9 and install Bevel Gear Housing (piece #96)

NOTE: Allow for the compressibility of the gasket material. If the exact thickness gasket is not available, use the next larger thickness.

11. Install Spring Cartridge (piece #123), complete with Thrust Washer (piece #124), Belleville Springs (piece #108), O-Ring (piece #117), and Quad-Ring (piece #118).

NOTE: The springs should be stacked in the same fashion as was noted in Step 3 in Section 8.1.1, SB-00 Disassembly/Stem Nut Removal. The standard arrangement has the Belleville Washers stacked in pairs. See note after step 12 for optional conﬁguration.

12. Install Locking Nut (piece #125) and tighten until it is snug against the Belleville Springs. See NOTE below. Secure by tightening Set Screw (piece #126).

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

NOTE: The SB-00 has available an optional, very light, Belleville Spring set consisting of eleven washers arranged as shown in Figure 8.1. Ensure washers are reinstalled correctly. The light spring set also has a Thrust Sleeve (piece #119) that is installed at this point. When the light spring set is used, the locknut installed in the next step must be pulled up snug against the spring set and then tightened an additional 1¾ turns to preload the springs.

13. Install Spring Housing Cover (piece #121) and gasket (piece #122).

Figure 8.1 – SB-00 Parts Diagram

01-403-0076-4

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 8.1 – SB-00 Parts List

Piece Quantity Description

1 1 Housing

2 1 LS Compartment Cover

4 1 Drive Sleeve

7 1 Worm Gear

8 1 Stem Nut

12 1 GL Drive Hypoid Gear

14 2 Clutch Key

22 1 Seal Retainer Plate

28 2 Clutch Ring

29 1 Worm Gear Spacer

42 1 Dowel Pin

43 1 Clutch Compression Spring

51 1 Bearing Shim

57 1 GLS Compartment Cover Gasket

63 1 Bearing Cup

64 1 Bearing Cone

65 1 Bearing Cup

66 1 Bearing Cone

78 1 Quad Ring

81 1 Ball Bearing

83 1 Torque Switch

87 1 Geared Limit Switch

96 1 Bevel Gear Housing

97 1 Bevel Pinion Cap

98 1 Bevel Gear Cartridge

99 1 Handwheel

100 1 Bevel Gear

101 1 Handwheel Bevel Pinion

102 1 Bearing Spacer

103 1 O-Ring Spacer

106 1 Bevel Pinion Cap Gasket

107 2 Bevel Gear Housing Gasket

108 various Belleville Spring

109 1 Ball Bearing

110 1 Ball Bearing

111 1 Retaining Ring

113 1 Grease Fitting

115 1 O-Ring

116 1 O-Ring

117 1 O-Ring

118 1 Quad-Ring

119 1 Thrust Limiter Sleeve

120 1 Thrust Adapter Sleeve

121 1 Spring Housing Cover

Continued on page 84

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 8.1 – SB-00 Parts List

Piece Quantity Description

122 1 Housing Cover Gasket

123 1 Spring Cartridge

124 1 Thrust Washer

125 1 Locking Nut

126 1 Socket Head Set Screw

130 6 Socket Head Cap Screw

131 6 Lockwasher

153 4 Hex Head Cap Screw (not shown)

154 2 Socket Head Cap Screw

155 4 Lockwasher (not shown)

156 1 Handwheel Key

158 4 Hex Head Cap Screw

159 6 Lockwasher

160 1 Shim Set

179 1 Socket Head Set Screw

185 2 Lifting Eye Bolt

186 2 Hex Nuts

8.2 SB-0

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

c WARNING: Extreme caution should be used in the disassembly and reassembly of the spring

The SB-0 actuator is a basic SMB-0 actuator with the housing cover, drive sleeve, and locknut modiﬁed to provide spring compression to the stem nut. The disassembly/reassembly procedure for the SMB-0 is applicable (Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly and Section 7.3.3, SMB-0, 1, 2, 3 and 4 Reassembly), with the following procedures replacing Step 11 and stem nut removal procedure.

8.2.1 SB-0 Disassembly/Stem Nut Removal

Piece numbers refer to Figure 8.2.

1. Remove Spring Housing (piece #3).

2. Remove Thrust Sleeve Bearing Cartridge (piece #106). The Belleville Spring (piece #109) and Belleville Spring Shim (piece #108) will come off with the Thrust Sleeve Bearing Cartridge (piece #106).

3. Remove Thrust Sleeve (piece #107), being careful not to loosen or damage O-Ring (piece #94). The Bearing Cup (piece #116) will come out with the Thrust Sleeve (piece #107).

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

4. Remove the Drive Sleeve (piece #11) in accordance with Step 12 of Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly. If only the Stem Nut (piece #20) is to be removed, see Step 5.

5. If the actuator is not on the valve, the Stem Nut (piece #20) is accessible. If the actuator is on the valve, bolt a support bar across the top of the actuator housing to hold the Thrust Bearing (piece #77 and #78) in place.

a. Place the actuator in hand operation.

b. Rotate the Handwheel in the direction to effect a downward movement of the stem—usually

the close direction. The Stem Nut will climb up the stem until it clears its splines.

c. Rotate the Stem Nut off the stem.

8.2.2 SB-0 Reassembly/Stem Nut Installation

Piece numbers refer to Figure 8.2.

1. Replace the Stem Nut (piece #20).

a. If the actuator is not on the valve, the stem nut will drop in the Drive Sleeve (piece #11) until it

bottoms out on the shoulder in the bottom of the Drive Sleeve. Ensure splines are engaged.

b. If the actuator is mounted on the valve, thread the Stem Nut (piece #20) down the stem until

the spines hit. Put the actuator in manual operation. Rotate the Handwheel in the direction to move the stem upward—usually the open direction. The Stem Nut will lower as the Handwheel turns, until it bottoms out on the shoulder in the Drive Sleeve bottom and the stem starts to move up.

2. Replace the Thrust Sleeve (piece #107) and the Bearing (piece #116). Ensure O-Rings (pieces #117 and 94) are properly installed.

NOTE: Ensure Thrust Sleeve engages the splines on the top of the Stem Nut (piece #20)—Thrust Sleeve will not rotate if not engaged properly.

3. Clean Housing (piece #2), ﬂange, and mounting ﬂange of the Spring Housing (piece #3).

4. Install Spring Housing (piece #3) without any gasket. Measure the gap between the Spring Housing (piece #3) and the Housing (piece #2).

5. Remove Spring Housing (piece #3). Install a Gasket (piece #66) between Housing and Spring Housing.

NOTE: The Gasket thickness should be the same as the gap measured in Step 4, plus an allowance for the compressibility of the gasket material used. If an exact gasket thickness can not be obtained, use the next higher thickness gasket available.

6. Replace the Thrust Sleeve Bearing Cartridge (piece #106) along with the Belleville Springs (piece #109—four washers), and the Belleville Spring Shim (piece #108).

7. Inspect to ensure O-Ring (piece #118) is properly installed in the Spring Housing (piece #3). Install Spring Housing.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Figure 8.2 – SB-0 Parts Diagram

01-416-0027-4

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 8.2 – SB-0 Parts List

Piece Quantity Description

2 1 Housing

3 1 Spring Housing

6 1 Geared Limit Switch Compartment Cover

11 1 Drive Sleeve

16 1 Worm Gear

20 1 Stem Nut

26 1 Seal Retainer Plate

28 1 Spacer

66 1 Spring Housing Gasket

69 1 Limit Switch Compartment Cover Gasket

74 1 Bearing Shim Set

75 1 Bearing Cone

76 1 Bearing Cup

77 1 Bearing Cone

78 1 Bearing Cup

93 1 Quad Ring

94 1 O-Ring

98 1 Grease Fitting

104 1 Torque Switch

106 1 Thrust Sleeve Bearing Cartridge

107 1 Thrust Sleeve

108 1 Belleville Spring Shim

109 5 Belleville Springs

110 1 Indicator Dial Plate

111 1 Indicator Shaft

112 1 Indicator Lever

113 1 Indicator Spring

114 1 Indicator Pointer

116 1 Bearing Cup

117 1 Quad Ring

118 1 O-Ring

119 1 O-Ring

163 1 Plug

168 2 Roll Pin

169 8 Socket Head Cap Screw

171 1 Socket Head Set Screw

172 1 O-Ring

180 4 Drive Screw

203 8 Lockwasher

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

8.3 SB-1

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

c WARNING: Extreme caution should be used in the disassembly and reassembly of the spring

The SB-1 actuator is a basic SMB-1 actuator with the housing cover, drive sleeve, and locknut modiﬁed to provide spring compression to the stem nut. The disassembly/assembly procedure for the SMB-0 is applicable (Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly and Section 7.3.3, SMB-0, 1, 2, 3 and 4 Reassembly), with the following procedures replacing Step 11 and stem nut removal procedure.

8.3.1 SB-1 Disassembly/Stem Nut Removal

Piece numbers refer to Figure 8.3.

1. Remove the Spring Housing (piece #159).

2. Remove the Spring Housing Adapter (piece #156).

3. Remove the Thrust Spring Bearing Cartridge (piece #151). The Belleville Springs (piece #153), Seal Bushings (piece #160) and Belleville Spring Shim (piece #154) will come off with the Thrust Spring Bearing Cartridge.

4. Remove the Thrust Sleeve (piece #147). Be careful not to loosen or damage the Quad Ring (piece #150). The Bearing (piece #146) will come out with the Thrust Sleeve (piece #147).

5. Remove the Bearing Retainer (piece #155). Remove the Drive Sleeve (piece #11) in accordance with Step 12 of Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly. If only the Stem Nut (piece #20) is to be removed, see Step 6.

6. If the actuator is not on the valve, the Stem Nut (piece #20) is accessible. If the actuator is on the valve, bolt the Bearing Retainer (piece #155) to the housing using two bolts.

a. Place the actuator in hand operation.

b. Rotate the Handwheel in the direction to effect a downward movement of the stem—usually

the close direction. The Stem Nut will climb up the stem until it clears its splines.

c. Rotate the Stem Nut off the stem.

⁄8" x 11 UNC x1¼" long

8.3.2 SB-1 Reassembly/Stem Nut Installation

Piece numbers refer to Figure 8.3.

1. Replace the Stem Nut (piece #20).

a. If the actuator is not on the valve, the Stem Nut will drop in the Drive Sleeve (piece #11) until it

bottoms out on the shoulder in the bottom of the Drive Sleeve. Ensure splines are engaged.

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

b. If the actuator is mounted on the valve, thread the Stem Nut (piece #20) down the stem until

the splines hit. Put the actuator in manual operation. Rotate the Handwheel in the direction to move the stem upward—usually the open direction. The Stem Nut will lower as the Handwheel turns, until it bottoms out on the shoulder in the Drive Sleeve bottom and the stem starts to move up.

2. Replace the Thrust Sleeve (piece #147) and the Bearing (piece #146). Ensure O-Ring (piece #148) and Quad Ring (piece #150) are properly installed. Ensure the Thrust Sleeve engages the splines on the top of the Stem Nut. The Thrust Sleeve will not rotate if engaged improperly.

3. Replace the Thrust Spring Bearing Cartridge (piece #151) along with the Belleville Springs (piece #153) and Belleville Spring Shim (piece #154). Ensure the Belleville Springs are stacked as indicated in Figure 8.3. Ensure the O-Ring (piece #162) is installed in the Thrust Sleeve.

4. Install the Spring Housing Adapter (piece #156) using a

⁄32" gasket.

5. Ensure the Seal Bushing (piece #160) and the O-Ring (piece #161) are properly installed in the Spring Housing (piece #159).

6. Install the Spring Housing (piece #159) using a

⁄32" gasket.

Figure 8.3 – SB-1 Parts Diagram

01-416-0028-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 8.3 – SB-1 Parts List

Piece Quantity Description

2 1 Housing

11 1 Drive Sleeve

16 1 Worm Gear

20 1 Stem Nut

26 1 Seal Retainer Plate

28 1 Spacer

69 1 Limit Switch Compartment Cover Gasket

74 1 Bearing Shim

75 1 Bearing Cone

76 1 Bearing Cup

77 1 Bearing Cone

78 1 Bearing Cup

93 1 Quad Ring

104 1 Torque Switch

146 1 Bearing Cup

147 1 Thrust Sleeve

148 1 O-Ring

150 1 Quad Ring

151 1 Thrust Spring Bearing Cartridge

153 14 Belleville Spring

154 1 Belleville Spring Shim

155 1 Bearing Retainer

156 1 Spring Housing Adapter

157 1 Housing Cover Gasket

158 1 Adapter Gasket

159 1 Spring Housing

160 1 Seal Bushing

161 1 O-Ring

162 1 O-Ring

163 1 Plug for Indicator Shaft

164 1 Indicator Shaft

165 1 O-Ring

166 1 Indicator Lever

167 1 Indicator Pointer

168 2 Roll Pin

169 1 Indicator Spring

170 1 Indicator Dial Plate

172 1 O-Ring

179 8 Socket Head Cap Screw

180 4 Drive Screw

181 2 Flat Washers

225 1 Socket Head Set Screw

240 8 Lockwasher

241 1 Bearing Cone

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

8.4 SB-2

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

c WARNING: Extreme caution should be used in the disassembly and reassembly of the spring

The SB-2 actuator is a basic SMB-2 actuator with the housing cover, drive sleeve, and locknut modiﬁed to provide spring compression to the stem nut. The disassembly/assembly procedure for the SMB-2 is applicable (Sections 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly and Section 7.3.3, SMB-0, 1, 2, 3 and 4 Reassembly), with the following procedures replacing Step 11 and stem nut removal procedure.

8.4.1 SB-2 Disassembly/Stem Nut Removal

Piece numbers refer to Figure 8.4.

1. Remove Spring Housing Cover (piece #161).

2. Remove Spring Cartridge (piece #173), complete with Belleville Springs (piece #179), Thrust Washers (piece #178), Thrust Limit Sleeve (piece #199), and Spring Retainer Cap (piece #180).

NOTE: The spring assembly should not be disassembled unless absolutely necessary.

To disassemble the compensator spring cartridge:

a. Remove the Spring Retainer Cap (piece #180). Be careful to remove the set screws securing

the Spring Retainer Cap to the Spring Cartridge before trying to remove locknut.

b. Lift off the Thrust Washer (piece #178), the Belleville Springs (piece #179), and the Thrust

Limit Sleeve (piece #199).

To reassemble the Spring Cartridge:

a. Position the Belleville Springs (piece #179) between the two Thrust Washers (piece #178) as

shown in Figure 8.4.

b. Thread Spring Retainer Cap (piece #180) onto the Spring Cartridge (piece #173) until it hits

the shoulder on the cartridge.

c. Reinstall set screws or drill and tap for new set screw locations.

3. Remove the Thrust Sleeve (piece #168), complete with the Bearing Cup (piece #169) and the Bearing Cone (piece #170).

4. Read Step 6. Remove the Spring Housing (piece #163).

5. Remove the Drive Sleeve in accordance with Step 12 of Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly. If only the Stem Nut (piece #20) is to be removed, see Step 6.

6. If the actuator is not on the valve, lift the Stem Nut (piece #20) directly from the actuator. If the actuator is on the valve, bolt a support bar across the top of the actuator Housing to hold the Bearing Cone (piece #77) and the Bearing Cup (piece #78) in place.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

a. Place the actuator in hand operation.

b. Rotate the Handwheel in the direction to effect a downward movement of the stem—usually

the close direction. The Stem Nut will climb up the stem until it clears its splines.

c. Rotate the Stem Nut off the stem.

8.4.2 SB-2 Reassembly/Stem Nut Installation

Piece numbers refer to Figure 8.4.

1. Replace the Stem Nut (piece #20).

a. If the actuator is not on the valve, the Stem Nut will drop in the Drive Sleeve (piece #11) until it

bottoms out on the shoulder of the Drive Sleeve. Ensure splines are engaged.

b. If the actuator is mounted on the valve, thread the Stem Nut (piece #20) down the stem until

2. Replace the Thrust Sleeve (piece #168) and the Bearing Cup and Cone (piece #169, 170). Ensure the Quad Ring (piece #194) and the O-Ring (piece #176) are properly installed. Ensure the Thrust Sleeve engages the splines on the top of the Stem Nut—the Thrust Sleeve will not rotate if engaged improperly.

3. Clean the Housing (piece #2), ﬂange, and mounting ﬂange of the Spring Housing (piece #163).

4. Install the Spring Housing without any gasket. Measure the gap between the Spring Housing (piece #163) and the Housing (piece #2).

5. Remove the Spring Housing (piece #163). Install a gasket between the Housing and the Spring Housing. The gasket thickness should be the same as the gap measured in Step 4, plus an allowance for the compressibility of the gasket material used. If an exact gasket thickness can not be obtained, use the next higher thickness gasket available.

6. Install Spring Housing (piece #163).

7. Replace Spring Cartridge (piece #173) as an assembly. Install O-Ring (piece #197) in Spring Cartridge Cap.

8. Install Spring Housing Cover (piece #161) using a gasket of sufﬁcient thickness, including allowance for compressibility, to ﬁll any gap between the Spring Housing Cover and the Spring Housing.

Figure 8.4 – SB-2 Parts Diagram

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

01-416-0030-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 8.4 – SB-2 Parts List

Piece Quantity Description

2 1 Housing

11 1 Drive Sleeve

16 1 Worm Gear

20 1 Stem Nut

26 1 Seal Retainer Plate

28 1 Spacer

66 1 Spring Housing Gasket

69 1 Limit Switch Compartment Cover Gasket

74 1 Bearing Shim

75 1 Bearing Cone

76 1 Bearing Cup

77 1 Bearing Cone

78 1 Bearing Cup

93 1 Quad Ring

98 1 Grease Fitting

104 1 Torque Switch

161 1 Spring Housing Cover

163 1 Spring Housing

168 1 Thrust Sleeve

169 1 Bearing Cup

170 1 Bearing Cone

173 1 Spring Cartridge

176 1 O-Ring

178 2 Thrust Washer

179 5 Belleville Spring

180 1 Spring Retainer Cap

181 2 Socket Head Set Screw

183 1 Indicator Shaft

184 1 Roll Pin

187 1 O-Ring

190 1 Indicator Dial

192 1 Indicator Pointer

194 1 Quad Ring

195 1 Indicator Spring

196 1 Indicator Lever

197 1 O-Ring

198 1 Spring Cover Gasket

199 1 Thrust Limit Sleeve

200 1 Indicator Shaft Bushing

201 2 Socket Head Set Screw

202 11 Socket Head Cap Screw

203 12 Lockwasher

204 12 Lockwasher

205 12 Socket Head Cap Screw

206 2 Drive Screw

207 1 Socket Head Cap Screw

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

8.5 SB-3

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

c WARNING: Extreme caution should be used in the disassembly and reassembly of the spring

The SB-3 actuator is a basic SMB-3 actuator with the housing cover, drive sleeve, and locknut modiﬁed to provide spring compression to the stem nut. The disassembly/assembly procedure for the SMB-3 is applicable (Sections 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly and Section 7.3.3, SMB-0, 1, 2, 3 and 4 Reassembly), with the following procedures replacing Step 11 and stem nut removal procedure.

8.5.1 SB-3 Disassembly/Stem Nut Removal

Piece numbers refer to Figure 8.5.

1. Remove the Spring Housing (piece #140).

2. Remove the Spring Cartridge (piece #149), complete with Belleville Springs (piece #152), Thrust Washers (pieces #150, 153), Deﬂection Limit Sleeve (piece #161), and Spring Retainer Cap (piece #166).

NOTE: The spring assembly should not be disassembled unless absolutely necessary.

To disassemble the Spring Cartridge:

a. Remove the Spring Retainer Cap (piece #166). Be careful to remove the set screws securing

the Spring Retainer Cap to the Spring Cartridge before trying to remove Spring Retainer Cap .

b. Lift off Thrust Washer (piece #150), Belleville Springs (piece #152), Deﬂection Limit Sleeve

(piece #161) and Thrust Washer (piece #153).

To reassemble the Spring Cartridge:

a. Position Belleville Springs (piece #152) between the two Thrust Washers (pieces #153 and

#150) as shown in Figure 8.5.

b. Thread the Spring Retainer Cap (piece #166) onto the Spring Cartridge (piece #149) until the

Spring Retainer Cap touches the Thrust Washer. Add ¾ turn.

c. Reinstall set screws or drill and tap for new set screw locations.

d. Install Deﬂection Limit Sleeve (piece #161).

3. Remove the Bearing Cartridge (piece #154), complete with Bearing Cup and Cone (pieces #147 and #148).

4. Remove Centering Ring (piece #167) and the Drive Sleeve Bearing Cartridge (piece #3).

5. Remove Drive Sleeve (piece #11) in accordance with Step 12 of Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly. If only the Stem Nut (piece #20) is to be removed, see Step 6.

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

6. If the actuator is not on the valve, the Stem Nut (piece #20) is accessible. If the actuator is on the valve, bolt the Drive Sleeve Bearing Cartridge (piece #3) to the Housing (piece #2) using two UNC x 9 UNC x 1½" long bolts to hold the Bearing Cone and Cup (pieces #77 and 78) in place.

a. Place the actuator in hand operation.

b. Rotate the Handwheel in the direction to effect a downward movement of the stem—usually

the close direction. The Stem Nut will climb up the stem until it clears its splines.

c. Rotate the Stem Nut off the stem.

⁄8"

8.5.2 SB-3 Reassembly/Stem Nut Installation

Piece numbers refer to Figure 8.5.

1. Replace the Stem Nut (piece #20).

a. If the actuator is not on the valve, the Stem Nut will drop in the Drive Sleeve (piece #11) until it

bottoms out on the shoulder of the Drive Sleeve. Ensure splines are engaged.

b. If the actuator is mounted on the valve, thread the Stem Nut (piece #20) down the stem until

2. Replace the Bearing Cartridge (piece #154) and the Bearing Cup and Cone (pieces #147, 148).

Ensure Quad Ring (piece #168) and O-Ring (piece #163) are properly installed. Ensure the Bearing Cartridge engages the splines on the top of the Stem Nut—the Bearing Cartridge will not rotate if engaged properly.

3. Replace the Centering Ring (piece #167).

4. Replace the Spring Cartridge (piece #149) as an assembly along with the Belleville Springs (piece #152), Thrust Washers (pieces #150, 153), and Spring Retainer Cap (piece #166).

5. Replace the Deﬂection Limit Sleeve (piece #161).

6. Verify that the O-Ring (piece #160) is properly installed in the Spring Retainer Cap (piece #166). Install the Spring Housing (piece #140), adding a gasket for sufﬁcient thickness to ﬁll in the gap “a,” making an allowance for the gasket material compressibility.

Figure 8.5 – SB-3 Parts Diagram

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

01-416-0029-4

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

Table 8.5 – SB-3 Parts List

Piece Quantity Description

2 1 Housing

3 1 Drive Sleeve Bearing Cartridge

6 1 Limit Switch Compartment Cover

11 1 Drive Sleeve

16 1 Worm Gear

20 1 Stem Nut

26 1 Seal Retainer Plate

28 1 Worm Gear Spacer

65 1 Spring Housing Gasket

66 1 Housing Cover Gasket

69 1 Limit Switch Compartment Cover Gasket

74 1 Bearing Shim

75 1 Bearing Cone

76 1 Bearing Cup

77 1 Bearing Cone

78 1 Bearing Cup

93 1 Quad Ring

98 1 Grease Fitting

104 1 Torque Switch

140 1 Spring Housing

147 1 Bearing Cup

148 1 Bearing Cone

149 1 Spring Cartridge

150 1 Thrust Washer

152 10 Belleville Spring

153 1 Thrust Washer

154 1 Bearing Cartridge

155 1 Indicator Dial

156 1 Indicator Shaft

157 1 Indicator Lever

158 1 Indicator Pointer

159 1 Indicator Spring

160 1 O-Ring

161 1 Deﬂection Limit Sleeve

162 1 O-Ring

163 1 O-Ring

164 2 Roll Pin

165 1 Socket Head Set Screw

166 1 Spring Retainer Cap

167 1 Centering Ring

168 1 Quad Ring

169 4 Drive Screw

174 5 Flat Washer

176 1 Socket Head Set Screw

179 12 Socket Head Cap Screw

180 12 Lockwasher

SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

8.6 SB-4

c WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before

proceeding with disassembly.

c WARNING: Extreme caution should be used in the disassembly and reassembly of the spring

The SB-4 actuator is a basic SMB-4 actuator with the housing cover, drive sleeve, and locknut modiﬁed to provide spring compression to the stem nut. The disassembly/assembly procedure for the SMB-4 is applicable (Sections 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly and Section 7.3.3, SMB-0, 1, 2, 3 and 4 Reassembly), with the following procedures replacing Step 11 and stem nut removal procedure.

8.6.1 SB-4 Disassembly/Stem Nut Removal

Piece numbers refer to Figure 8.6.

1. Remove the Spring Housing (piece #163).

2. Remove the Thrust Washer (piece #178).

3. Remove the Spring Cartridge Assembly including the Spring Cartridge (piece #173), Belleville Spring (piece #179), and Spring Cartridge Cover (piece #180).

4. Remove the Bearing Cartridge (piece #168). Bearing Cone (piece #169) and Bearing Cup (piece #170) will come out with the Bearing Cartridge.

5. Remove the Housing Cover Cartridge (piece #155).

6. Remove the Drive Sleeve (piece #11) in accordance with Step 12 of Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly. If only the Stem Nut (piece #20) is to be removed, see Step 7.

7. If the actuator is not on the valve, the Stem Nut (piece #20) is accessible. If the actuator is on the valve, bolt the Housing Cover Cartridge (piece #155) to the Housing (piece #2) using two 1"-8 UNC x 2.5" long bolts.

a. Place the actuator in hand operation.

b. Rotate the Handwheel in the direction to effect a downward movement of the stem—usually

the close direction. The Stem Nut will climb up the stem until it clears its splines.

c. Rotate the Stem Nut off the stem.

8.6.2 SB-4 Reassembly/Stem Nut Installation

Piece numbers refer to Figure 8.6.

1. Replace the Stem Nut (piece #20).

a. If the actuator is not on the valve, the Stem Nut will drop in the Drive Sleeve (piece #11) until it

bottoms out on the shoulder of the Drive Sleeve. Ensure splines are engaged.

b. If the actuator is mounted on the valve, thread the Stem Nut (piece #20) down the stem until

the splines hit. Put the actuator in manual operation. Rotate the Handwheel in the direction to

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SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15

move the stem upward—usually the open direction. The Stem Nut will lower as the Handwheel turns, until it bottoms out on the shoulder in the Drive Sleeve and the stem starts to move up.

2. Replace the Bearing Cartridge (piece #168), the Bearing Cone (piece #169), and the Bearing Cup (piece #170). Ensure the O-Ring (piece #175) and the Quad Ring (piece #176) are properly installed. Ensure the Bearing Cartridge engages the splines on the top of the Stem Nut—the Bearing Cartridge will not rotate if engaged improperly.

3. Replace the Spring Cartridge (piece #173) as an assembly with Thrust Washer (piece #178) installed in the bottom and the Belleville Spring (piece #179) arranged as shown in Figure 8.6. Also include the Spring Cartridge Cover (piece #180) and the O-Ring (piece #181).

4. Replace the Thrust Washer (piece #178) on the top of the Spring Cartridge.

5. Replace the Spring Housing (piece #163) with a

⁄32" gasket.

6. Remove the Cover Plate (piece #188). Realign deﬂection indicator.

7. Pull the Pointer and the Pointer Shaft outward and move to “O” deﬂection.

8. Push the Pointer and the Pointer Shaft back in and replace the Cover Plate (piece #188).

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