Flowserve Limitorque Accutronix MX Guide

130-12000
Rev. B
11/02
Limitorque®
Accutronix MX
Maintenance & Spare Parts Manual
Limitorque Actuation Systems

Disclaimer
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
Accutronix MX Maintenance &
Spare Parts Manual
©2002 Copyright Limitorque. All rights reserved.
Printed in the United States of America.
Disclaimer
No part of this book shall be reproduced, stored in a retrieval system, or transmitted by any means,
electronic, mechanical, photocopying, recording, or otherwise without the written permission of
Limitorque. While every precaution has been taken in the preparation of this book, the publisher
assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting
from the use of the information contained herein.
This document is the proprietary information of Limitorque, furnished for customer use ONLY. No
other uses are authorized without written permission from Limitorque.
Limitorque reserves the right to make changes, without notice, to this document and the products it
describes. Limitorque shall not be liable for technical or editorial errors or omissions made herein; nor
for incidental or consequential damages resulting from the furnishing, performance, or use of this
document.
This manual contains information that is correct to the best of Limitorque’s knowledge.
It is intended to be a guide and should not be considered as a sole source of technical instruction,
replacing good technical judgment, since all possible situations cannot be anticipated. If there is any
doubt as to exact installation, configuration, and/or use, call Limitorque‚ at [phone].
The choice of system components is the responsibility of the buyer, and how they are used cannot
be the liability of Limitorque. However, Limitorque’s sales team, product managers and application
engineers are always available to assist you in making your decision. The latest revisions to this
document are available online at http://www.limitorque.com
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Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
Table of Contents
1 Introduction 1-1
1.1 Premise 1-1
1.2 Important Notes & Warning Statements 1-1
1.3 Procedure Emphasis 1-1
1.4 Reference Documents 1-2
2 Accutronix MX Actuator Subassembly 2-1
2.1 MX Actuator Subassembly Components 2-1
2.2 Product Information 2-2
2.2.1 Product Description 2-2
2.2.2 Storage 2-2
2.2.3 Unit Weights 2-2
2.3 Product Identification 2-3
2.3.1 Initial Inspection & Recording Suggestions 2-3
2.4 Maintenance 2-3
2.4.1 Recommended Maintenance 2-3
2.4.2 Unit Lubrication 2-3
2.4.3 O-Ring & Lubrication 2-5
2.5 Subassembly Removal & Remounting Procedures 2-5
2.6 How to Order Replacement Subassemblies 2-5
2.6.1 Replacement Parts 2-5
2.6.2 Return Procedure 2-6
3 Remove Actuator from Mounting Adapter 3-1
3.1 Actuator Removal with Type B1/B4/B4E Base (Torque) 3-1
3.1.1 Removal (Type B1/B4/B4E Base) 3-1
3.1.2 Remounting (Type B1/B4/B4E) 3-2
3.2 Actuator Removal with Type A1/A1E Base (Thrust) 3-3
3.2.1 Removal (Type A1/A1E Base) 3-3
3.2.2 Remounting (Type A1/A1E Base) 3-4
3.2.3 Removal (Type A1/A1E Base) 3-6
3.2.4 Remounting (Type A1/A1E Base) 3-7
4 Mechanical Assemblies 4-1
4.1 Motor (MX-05, 10, 20, 40, 85 & 140) 4-1
4.1.1 Removal 4-1
4.1.2 Remounting 4-2
4.2 Declutch (MX-05, 10, 20, 40, 85 & 140) 4-4
4.2.1 Removal 4-6
4.2.2 Remounting 4-8
4.3 Top-Mounted Handwheel (MX-05, 10, 20, & 40) 4-10
4.3.1 Removal 4-10
4.3.2 Remounting 4-11
4.4 Side-Mounted Handwheel (MX-10, 20, 85 & 140) 4-12
4.4.a Side-Mounted Handwheel Without Spur Gear Attachment (MX-85 & 140) 4-13
4.4.1 Removal of Side-Mounted Handwheel for MX-20 & 40 4-14
4.4.2 Removal 4-15
4.4.3 Remounting 4-16
4.5 Side-Mounted Handwheel (MX-40, 85 & 140) 4-17
4.5.a MX-85 & 140 Handwheel With SGA 4-18
4.5.1 Removal 4-19
4.5.2 Removal 4-20
4.5.3 Remounting 4-23
4.6 Converting Top-Mounted Handwheel to Side-Mounted Handwheel
(MX-10, 20, & 40) 4-27
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Table of Contents
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
4.6.1 Removing Top-Mounted Handwheel 4-27
4.6.2 Installing Side-Mounted Handwheel 4-28
4.7 Thrust Base Type A1/A1E 4-30
4.7.1 Removal 4-34
4.7.2 Remounting 4-34
4.8 Torque Base Type B1 4-35
4.8.1 Removal 4-36
4.8.2 Remounting 4-36
4.9 Baseplate Type B4 (MX-05, 10, 20, & 40) 4-37
4.9.1 Removal 4-38
4.9.2 Remounting 4-38
4.10 Worm Shaft (MX-05, 10, 20, 40, 85 & 140) 4-39
4.10.1 Removal 4-40
4.10.2 Remounting 4-40
4.11 Drive Sleeve (MX-05 & 10) 4-42
4.11.1 Removal 4-43
4.11.2 Remounting 4-43
4.12 Drive Sleeve (MX-20 40, 85 & 140) 4-44
4.12.1 Removal 4-45
4.12.2 Remounting 4-46
4.12.a MX-85 & 140 Optional Drive Sleeve and Baseplate Removal 4-47
4.12.b MX-85 & 140 Optional Drive Sleeve and Baseplate Remounting 4-48
4.13 Handwheel Adapter (MX-05) 4-49
4.13.1 Removal 4-50
4.13.2 Remounting 4-51
4.14 Handwheel Adapter/Handwheel Worm Gear (MX-10, 20, 40, 85 & 140) 4-53
4.14.1 Removal 4-55
4.14.2 Remounting 4-56
4.15 Clutch & Clutch Ring Components (MX-20 & 40) 4-59
4.15.1 Removal 4-60
4.15.2 Remounting 4-61
5 Electronic Assemblies 5-1
5.1 Accutronix Control Panel (ACP) (MX-05, 10, 20, & 40) 5-1
5.1.1 Removal 5-2
5.1.2 Remounting 5-3
5.2 Control Module (MX-05, 10, 20, & 40) 5-4
5.2.1 Removal 5-5
5.2.2 Remounting 5-8
5.2.3 Fuse Replacement 5-12
5.2.4 Control Module Return Options 5-12
5.2.5 EPROM Care & Replacement 5-14
5.2.5.1 EPROM Storage & Handling 5-16
5.2.5.2 EPROM Removal 5-16
5.2.5.3 EPROM Installation 5-16
5.2.5.4 Adding Electronic Option to Your Accutronic MX Actuator 5-17
5.3 Restoring Power to Actuator with New Control Module 5-18
5.4 Terminal Block (MX-05, 10, 20, & 40) 5-18
5.4.1 Removal 5-19
5.4.2 Remounting 5-21
5.5 Control Module—Contactor Module (MX-05, 10, 20, & 40) 5-23
5.5.1 Removal 5-24
5.5.2 Remounting 5-25
5.6 Encoder (MX-05, 10, 20, & 40) 5-27
5.6.1 Removal 5-28
5.6.2 Remounting 5-29
5.7 Encoder Drive Cartridge (MX-05, 10, 20, & 40) 5-30
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Table of Contents/Figures
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
5.7.1 Removal 5-31
5.7.2 Remounting 5-31
5.8 Motor Lead Harness (MX-85 & 140 only) 5-32
5.8.1 Removal 5-33
5.8.2 Remounting 5-34
6 Spare & Replacement Parts 6-1
6.1 Guidelines for Recommended Spare Parts 6-1
6.1.1 Wear Components 6-1
6.1.2 Bearings, O-Rings, & Seals 6-1
6.1.3 Critical Components 6-1
6.2 Recommended Spare Parts 6-2
6.2.1 Commissioning & Startup 6-2
6.2.2 Short-Term Duty 6-2
6.2.3 Long-Term Duty 6-2
6.2.4 Severe Duty 6-2
6.3 Other Concerns 6-3
7 Regulatory Information 7-1
Figures
Figure 2.1 – Accutronix MX-05 Actuator 2-1
Figure 2.2 – Accutronix MX Nameplate 2-3
Figure 2.3 – Oil Fill/Plug Locations for Side-Mounted & Top-Mounted Handwheels 2-4
Figure 4.1 – Motor (MX-05, 10, 20, & 40) 4-1
Figure 4.2 – Declutch (MX-05 & 10) 4-4
Figure 4.3 – Declutch (MX-20 & 40) 4-5
Figure 4.4 – Declutch (MX-85 & 140) 4-6
Figure 4.5 – Top-Mounted Handwheel (MX-05, 10, 20, & 40) 4-10
Figure 4.6 – Side-Mounted Handwheel (MX-10 & 20) 4-12
Figure 4.7 – Side-Mounted Handwheel (MX-85 & 140) 4-13
Figure 4.8 – Side-Mounted Handwheel with SGA (MX-40) 4-17
Figure 4.9 – Side-Mounted Handwheel with SGA (MX-85 & 140) 4-18
Figure 4.10 – Type A1 Thrust Base (MX-05) 4-30
Figure 4.11 – Type A1 Thrust Base (MX-10, 20, & 40) 4-31
Figure 4.12 – Type A1 Thrust Base (MX-85)- F16 Flange 4-32
Figure 4.13 – Type A1 Thrust Base (MX-140)- F25 Flange 4-33
Figure 4.14 – Type B1 Torque Base (MX-05, 10, 20, & 40) 4-35
Figure 4.15 – Type B4 Baseplate (MX-05, 10, 20, & 40) 4-37
Figure 4.16 – Type B4 Baseplate (MX-85 & 140) 4-37
Figure 4.17 – Worm Shaft (MX-05, 10, 20, & 40) 4-39
Figure 4.18 – Drive Sleeve (MX-05 & 10) 4-42
Figure 4.19 – Drive Sleeve (MX-20 & 40) 4-44
Figure 4.20 – Drive Sleeve (MX 85 & 140) 4-44
Figure 4.21 – Handwheel Adapter (MX-05) 4-49
Figure 4.22 – Handwheel (MX-05) 4-50
Figure 4.23 – Handwheel Adapter Assembly 4-53
Figure 4.24 – Handwheel Worm Gear Assembly 4-54
Figure 4.25 – Clutch & Clutch Ring Components (MX-20 & 40) 4-59
Figure 4.26 – Clutch & Clutch Ring Components (MX-85 & 140) 4-59
Figure 4.27 – Clutch Ring (MX-85 & 140) 4-62
Figure 5.1 – Accutronix Control Panel 5-1
Figure 5.2 – Control Module 5-4
Figure 5.3 – Location of fuses and voltage jumper 5-12
Figure 5.4 – Standard Board Set 5-12
Figure 5.5 – Standard Board Set with DDC Option 5-13
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Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
VIII
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Limitorque Actuation Systems
Figures/Tables
Figure 5.6 – Standard Board Set with I/O Option 5-13
Figure 5.7 – Standard Board Set with DDC & I/O Option 5-13
Figure 5.8 – LCS Board 5-14
Figure 5.9 – Main CPU Board 5-14
Figure 5.10 – Power Board 5-15
Figure 5.11 – DDC Board 5-15
Figure 5.12 – Restoring Power to Actuator with New Control Module 5-18
Figure 5.13 – Terminal Block 5-18
Figure 5.14 – Control Module – Contactor Assembly 5-23
Figure 5.15 – Encoder 5-27
Figure 5.16 – Encoder Drive Cartridge 5-30
Tables
Table 2.1 – Unit weights 2-2
Table 2.2 – MX-05 & 10 Oil Capacities when using Oil Fill/Plug Ports 2-4
Table 2.3 – MX-20 Oil Capacities when using Oil Fill/Plug Ports 2-4
Table 2.4 – MX-40 Oil Capacities when using Oil Fill/Plug Ports 2-5
Table 2.5 – MX-85 & 140 Oil Capacities when using Oil Fill/Plug Ports 2-5
Table 4.1 – Motor Parts List (MX-05, 10, 20, 40, 85 & 140) 4-1
Table 4.2 – Declutch Parts List (MX-05, 10, 20, 40, 85 & 140) 4-4
Table 4.3 – Declutch Parts List (MX-20 & 40) 4-5
Table 4.4 – Declutch Parts List (MX-85 & 140) 4-6
Table 4.5 – Top-Mounted Handwheel Parts List (MX-05, 10, 20, & 40) 4-10
Table 4.6 – Side-Mounted Handwheel Parts List (MX-10 & 20) 4-12
Table 4.7 – Side-Mounted Handwheel Without Spur Gear Attachment
Parts List (MX-85 & 140) 4-13
Table 4.8 – Side-Mounted Handwheel Parts List (MX-40) 4-17
Table 4.9 – Side-Mounted Handwheel Parts List (MX-85 & 140) 4-18
Table 4.10 – Type A1 Thrust Base Parts List (MX-05) 4-30
Table 4.11 – Type A1 Thrust Base Parts List (MX-10, 20, 40, & 140) 4-31
Table 4.12 – Type A1 Thrust Base Parts List (MX-85) 4-32
Table 4.13 – Type A1 Thrust Base (MX-140) - F25 Flange 4.33
Table 4.14 – Type B1 Torque Base Parts List (MX-05, 10, 20, & 40) 4-35
Table 4.15 – Type B4 Baseplate Parts List (MX-05, 10, 20, & 40) 4-37
Table 4.16 – Worm Shaft Parts List (MX-05, 10, 20, & 40) 4-39
Table 4.17 – Drive Sleeve Parts List (MX-05 & 10) 4-42
Table 4.18 – Drive Sleeve Parts List (MX-20 & 40) 4-44
Table 4.19 – Handwheel Adapter Parts List (MX-05) 4-49
Table 4.20 – Handwheel Adapter Assembly Parts List 4-53
Table 4.21 – Handwheel Worm Gear Assembly Parts List 4-54
Table 4.22 – Clutch & Clutch Ring Components Parts List 4-59
Table 4.23 – Clutch Ring Assembly Parts List 4-62
Table 5.1 – Accutronix Control Panel Parts List 5-1
Table 5.2 – Control Module Parts List 5-4
Table 5.3 – Terminal Block Parts List 5-18
Table 5.4 –Control Module – Contactor Assembly Parts List 5-23
Table 5.5 – Encoder Parts List 5-27
Table 5.6 – Encoder Drive Sleeve Speed 5-27
Table 5.7 – Encoder Drive Cartridge Parts List 5-30
Table 5.8 – Encoder Drive Cartridge Drive Sleeve Speed 5-30

Introduction
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
1Introduction
1.1 Premise
The MX actuator components are separated into subassembly groupings. This manual covers the
Removal and Remounting procedures for each subassembly group. Use these instructions when
disassembly is required for servicing, maintenance, or parts replacement.
1.2 Important Notes & Warning Statements
Please read this Maintenance & Spare Parts Manual carefully and completely before attempting to store
or perform maintenance on your Limitorque valve actuator. Further installation, setup, and operation
instructions are available in the Installation & Operation manual (130-11000) located in the actuator
terminal compartment at shipment.
aWARNING: Be aware of electrical hazards within the actuator and high-pressure hazards of the
attached valve or other actuated device when installing or performing maintenance on your MX actuator.
Failure to observe these precautions could result in serious bodily injury, damage to the equipment, or
operational difficulty.
aWARNING: Do not manually operate actuator with devices other than installed handwheel and
declutch lever. Using additive force devices (cheater bars, wheel wrenches, pipe wrenches, or other
devices of this nature) on the actuator handwheel or declutch lever may cause serious personal injury
and/or damage to the actuator or valve.
1.3 Procedure Emphasis
Please refer to the following methods used to emphasize text throughout this manual. Safety warnings,
cautions, and notes present material that is important to user-safety. Be sure to read any safety notices
you see as they could prevent equipment damage, personal injury, or even death to you or a co-worker.
Safety notices are presented in this manual in three forms:
aWARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow warning
notices could result in personal injury or death.
CAUTION: Directs the user’s attention to general precautions that, if not followed, could result in
personal injury and/or equipment damage.
NOTE: Highlights information critical to the user’s understanding of the procedure.
Bold text stresses attention to the details of the procedure.
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Introduction
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
1.4 Reference Documents
• Accutronix Protection, Control & Monitoring features of MX Electric Actuators
(Bulletin 130-00500)
• Accutronix MX Control, Performance & Value in Multi-turn Electric Valve Actuators
(Bulletin 130-10500)
• Accutronix MX Installation Manual (Bulletin 130-11000)
The latest revisions to these documents are available on-line from Limitorque’s web site,
www.limitorque.com.
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Accutronix MX Actuator Subassembly
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
2Accutronix MX Actuator Subassembly
Figure 2.1 – Accutronix MX-05 Actuator
2.1 MX Actuator Subassembly Components
2-1
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1 & 13
3
4
15
10 11 14 8
7
6
5
2
12
1. Top-mounted handwheel
2. Drive sleeve
3. Worm shaft
4. Motor
5. Declutch Lever
6. Encoder
7. Accutronix Control Panel (ACP)
8. Control module
10. Optional bases
Torque Base type:
• B1 = ISO 5210 base (fixed bore & key)
Thrust Base type:
• A1 = Standard thrust base
• A1E = Entended-reach thrust base
11. Baseplate-type B4 with stem nut options type:
• B4 = stem nut with variable bore and key
• B4E = extended-reach stem nut with variable
bore and key
• BL = splined stem nut (SAE or Involute)
12. Handwheel adapter/handwheel worm gear
13. Side-mounted handwheel (not shown)
14. Encoder drive cartridge
15. Terminal block

Accutronix MX Actuator Subassembly
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
2.2 Product Information
2.2.1 Product Description
Your MX actuator controls the opening and closing travel of valves and other actuated devices. OPEN
and CLOSED limits are protected by an absolute encoder that provides optical sensing of valve position
and measures valve position in both motor and handwheel operation. No battery or backup power
supply is required. Output torque is derived from motor speed, temperature, and voltage. If the preset
torque is exceeded, the motor shuts off. As a result of this reliable and advanced protection
technology, all valve and other actuated devices are protected from potential damage from overload,
improper seating, and foreign obstructions.
A range of control and network options are available and very simply added to the control capabili-
ties already available on a standard actuator. Contact your local Limitorque distributor or Limitorque
sales office for further information.
2.2.2 Storage
Storage Recommendations
Your MX actuator is double-sealed and weatherproof as shipped providing all compartment covers and
cable entry plugs are left intact. Actuators should be stored in a clean, dry, protected warehouse until
ready for wire-up. If actuators must be stored outdoors, they should be stored off the ground, high
enough to prevent being immersed in water or buried in snow.
If your unit incorporates a rising stem application, it may be shipped with a plastic cap over the drive
sleeve. If so, install a pipe plug or protective stem cover to protect the drive sleeve from possible
corrosion.
Preferred Storage Orientation
Your MX actuator should be stored with the motor and terminal compartment in the horizontal
position to obtain optimum service life.
2.2.3 Unit Weights
Table 2.1 – Unit weights
Unit Lbs Kg
MX-05 52 24
MX-10 65 29
MX-20 109 49
MX-40 133 60
MX-85 259 117
MX-140 300 136
NOTE: Weights include stem nut and lubricant.
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Accutronix MX Actuator Subassembly
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
2.3 Product Identification
2.3.1 Initial Inspection & Recording Suggestions
Upon receipt of the actuator, several steps should be initially followed to ensure condition of equip-
ment and to establish proper record keeping.
1. After removing the actuator from the shipping carton or skid, thoroughly examine it for any phys-
ical damage which may have occurred during shipment. If you note any damage, immediately report
the damage to the transport company and call Limitorque for further assistance.
2. A nameplate with important information is attached to each actuator. Record the following infor-
mation for use when you need to contact Limitorque with any questions about your actuator:
• Unit type/size
• Limitorque order number
• Serial number
Figure 2.2 – Accutronix MX Nameplate
2.4 Maintenance
2.4.1 Recommended Maintenance
Under normal operating conditions, the MX is a maintenance-free actuator. Therefore, for normal
applications, no formal actuator maintenance is required; although visual inspection for oil leakage and
excessive noise is recommended every 1 million drive sleeve turns or every 3000 cycles. When
conditions are severe, due to frequent operation or high temperatures, inspect the oil level and oil
quality more often. Replace any seals that permit oil leakage or water ingress. When installing pipe
plugs, use Teflon® tape or paste to achieve a proper seal.
2.4.2 Unit Lubrication
Check for proper oil level every 1 million drive sleeve turns (reference Installation & Operation
Manual - Diagnostics Section to learn how to view drive sleeve turns data). Change oil every 6000 unit
cycles or if water or other foreign material is found during oil inspection.
Oil Level Inspection & Fill Criteria
(Reference Lubrication Data tables on pages 2-4 & 2-5 for oil capacities when mounted in varying positions)
2-3
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Limitorque Actuation Systems
Unit
type/size
Limitorque
order no.
Serial
number

Accutronix MX Actuator Subassembly
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
• Actuator viewed in upright position (top-mounted handwheel up)
Oil level should be approximately 1 inch (25.4 mm) below the outer surface of the housing at the oil
fill port.
NOTE: Do not overfill with oil because oil will expand during actuator operation. Actuators are
shipped with an oil volume suitable for any mounting position. When checking the factory-
supplied oil level, excess oil may drain from the highest oil fill port due to the various
mounting orientations of each application.
• Actuator viewed in side-mounted position (terminal compartment up)
Oil level should be up to the bottom of the oil fill plug.
• Actuator viewed in all other positions than described previously should have the oil capacities main-
tained. Fill through the highest oil fill port until the oil is at a level that will contact the bottom of the
pipe plug when installed in oil fill port.
Figure 2.3 – Oil Fill/Plug Locations
Lubrication Data
• Oil Specifications
MX actuators are oil-filled using Mobile SHC-632, which is a synthetic oil suitable for ambient tempera-
tures of -22˚F to 250˚F (-30˚C to 120˚C). For extreme low temperature conditions, alternative
lubricants are available – consult factory for further information.
Table 2.2 – MX-05 & 10 Oil Capacities when using Oil Fill/Plug Ports
Nominal Oil Capacities oz. liters
MX-05 10 0.3
MX-10 16 0.5
Table 2.3 – MX-20 Oil Capacities when using Oil Fill/Plug Ports
Nominal Oil Capacities oz. liters
Top-mounted handwheel with
handwheel up 38 1.1
Top-mounted handwheel with
terminal compartment up 47 1.4
Side-mounted handwheel with
terminal compartment up 43 1.3
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Limitorque Actuation Systems
• MX-05 top-mounted
handwheel oil check/oil fill
• MX-10 side-mounted
handwheel oil check/oil fill
• Oil drain (all units)
• MX-10, 20, 40 top-mounted
handwheel oil check/oil fill
• MX-20, 40 side-mounted
handwheel oil check/oil fill

Accutronix MX Actuator Subassembly
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
Table 2.4 – MX-40 Oil Capacities when using Oil Fill/Plug Ports
Nominal Oil Capacities oz. liters
Top & side-mounted handwheel
with handwheel up 40 1.2
Top-mounted handwheel with
terminal compartment up 53 1.6
Side-mounted handwheel with
terminal compartment up 53 1.6
Table 2.5 – MX-85 & 140 Oil Capacities when using Oil Fill/Plug Ports
Nominal Oil Capacities oz. liters
All Configurations 192 5.7
2.4.3 O-Ring & Lubrication
O-rings and seals should be replaced anytime an actuator is disassembled. Lubricate with a substance
that is compatible with Buna N seals.
2.5 Subassembly Removal & Remounting Procedures
This manual divides each MX actuator subassembly into a Removal and Remounting
procedure. Use the following procedures to remove subassemblies for inspection, repair or replace-
ment. Some subassemblies require prior subassembly removal before allowing the desired subassembly
removal. Note the First Remove instructions at the beginning of each subassembly removal procedure.
Remove these subassemblies first, then remove the desired subassembly according to the instructions.
Once removed, evaluate subassembly components to determine requirement for a new subassembly. If
a new subassembly is required, see Section 2.6, How to Order Replacement Subassemblies. Once
components have been identified and replaced, remount following the appropriate Remounting
procedures.
2.6 How to Order Replacement Subassemblies
2.6.1 Replacement Parts
Replacement parts are sold in modular subassemblies; therefore, when part replacement is required,
order parts at the subassembly levels as shown in this manual. Parts may be ordered from your local
Limitorque representative (see web site at http://www.limitorque.com) or direct from the factory:
Telephone: [phone]
Fax: [phone]
Please have the following information, found on the actuator nameplate, available to help us facilitate
your order:
• Unit type/size
• Limitorque order number
• Serial number
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Accutronix MX Actuator Subassembly
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
2.6.2 Return Procedure
When parts are identified for warranty or other component replacement, a Return Material
Authorization (RMA) must be obtained from Limitorque. All returned parts must be
accompanied by documentation with the following information to obtain credit
for returned goods:
• Return Material Authorization (RMA)
• Unit type/size
• Limitorque order number
• Serial number
Return parts to the address listed below:
Limitorque
5114 Woodall Road
Lynchburg, VA 24502
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3Remove Actuator from Mounting Adapter
3.1 Actuator Removal with Type B1/B4/B4E Base (Torque)
3.1.1 Removal (Type B1/B4/B4E Base)
STEP 1
aWARNING Hazardous Voltage! Turn off all power sources to actuator
before removing actuator from mounting plate. Power sources may include:
Main power or control power. If necessary, disconnect incoming power leads
L1, L2, L3, and control wiring from the terminal block.
Remove the bolts that secure the actuator to the mounting adapter.
If type B1 or B4E base is used in addition to the standard type B4
baseplate, you may leave the B1 base attached to the mounting
adapter and remove the actuator only. Or if required, you may
remove the bolts that mount type B1 base to mounting adapter.
This will allow actuator removal along with optional B1 base.
STEP 2
aWARNING Potential high pressure vessel! Before disassembling your
actuator, ensure that the valve or other actuated device is isolated and is not
under pressure.
Lift actuator from mounting adapter.
Remove Actuator from Mounting Adapter
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002 3-1
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Remove Actuator from Mounting Adapter
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
3.1.2 Remounting (Type B1/B4/B4E Base)
STEP 3
Ensure stem nut (#1-22) is secured inside actuator drive sleeve with
retaining ring (#1-23). Lower actuator onto the mating component,
making sure to align stem nut key and keyway with mating
component.
STEP 4
Ensure that the actuator and mounting adapter flange
mating holes are aligned correctly.
STEP 5
aWARNING: Hazardous Voltage! Turn off all power sources before rewiring
incoming power leads L1, L2, L3, and control wiring in the terminal block.
Secure the actuator to the mounting adapter with
mounting bolts.
STEP 6
Reconnect incoming power leads L1, L2, L3, and control
wiring to the terminal block. Restore power source when
ready for operation.
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Remove Actuator from Mounting Adapter
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
3.2 Actuator Removal with Type A1/A1E Base (Thrust)
NOTE: Two procedure options are available for removing the actuator and thrust base:
1. Remove actuator from thrust base, leaving thrust base mounted to mounting flange or removing
thrust base separately.
2. Remove actuator and thrust base as a unit from mounting flange.
3.2.1 Removal (Type A1/A1E Base)—
Actuator removal separate from thrust base
STEP 1
aWARNING Hazardous Voltage! Turn off all power sources to
actuator before removing actuator from mounting plate. Power
sources may include main power or control power. If necessary,
disconnect incoming power leads L1, L2, L3, and control wiring from
the terminal block.
Remove the bolts (#10-10) that secure the actuator to the
thrust base assembly (#10).
STEP 2
aWARNING Potential high-pressure vessel! Before disassembling
your actuator, ensure that the valve or other actuated device is
isolated and is not under pressure.
Lift actuator from thrust base assembly (#10).
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Remove Actuator from Mounting Adapter
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
STEP 3
aWARNING Potential for actuated device to change position! The thrust
base will maintain position only if non-backdriving thread lead is used. Ensure
proper thread lead is used in your application before allowing thrust base to
be used for maintaining position when actuator is removed.
Thrust base removal (if required)
The valve position will be maintained if a locking thread lead is used
on the valve stem. If thrust base removal is required, use the following
removal procedure.
Remove the bolts that secure the thrust base to the
mounting adapter.
STEP 4
Rotate the thrust base (#10) until it feeds off the threaded stem.
3.2.2 Remounting (Type A1/A1E Base)—
Actuator remounting separate from thrust base
STEP 5
Thrust base remounting (if required)
Ensure the thrust base stem nut has the two lugs positioned upward
to engage with the drive sleeve slots when actuator is reinstalled onto
thrust base. Thread thrust base back onto mounting adapter.
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Remove Actuator from Mounting Adapter
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
STEP 6
Secure thrust base to mounting adapter with mounting bolts.
STEP 7
Actuator remounting
Lower the actuator onto the thrust base, making sure thrust nut lugs
align and properly engage with drive sleeve slots.
STEP 8
Install bolts (#10-10) to secure the actuator to the thrust base
assembly (#10).
STEP 9
aWARNING: Hazardous Voltage! Turn off all power sources before
rewiring incoming power leads L1, L2, L3, and control wiring in the
terminal block.
Reconnect incoming power leads L1, L2, L3, and control
wiring to the terminal block. Restore power source when
ready for operation.
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Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002
3.2.3 Removal (Type A1/A1E Base)—Actuator & thrust base as a unit
STEP 1
aWARNING Hazardous Voltage! Turn off all power sources to actuator
before removing actuator from mounting plate. Power sources may include
main power or control power. If necessary, disconnect incoming power leads
L1, L2, L3, and control wiring from the terminal block.
Actuator + thrust base removal
Remove the bolts that secure the actuator and thrust base (#10)
to the mounting adapter.
STEP 2
aWARNING Potential high-pressure vessel! Before disassembling
your actuator, ensure that the valve or other actuated device is isolated
and is not under pressure.
Declutch the actuator to manual mode.
STEP 3
Rotate the handwheel until the actuator lifts off the threaded stem.
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Remove Actuator from Mounting Adapter
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