Emerson Double-Acting Series Disassembly And Reassembly
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Emerson Double-Acting Series Disassembly And Reassembly

Emerson Double-Acting Series Disassembly And Reassembly

Hydraulic actuators
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Service Instructions
074985 Rev. B
October 2014
Bettis Disassembly and Reassembly
For Models HD732-S Double-Acting Series Hydraulic Actuators

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  • Page 1 Service Instructions 074985 Rev. B October 2014 Bettis Disassembly and Reassembly For Models HD732-S Double-Acting Series Hydraulic Actuators...

  • Page 3: Table Of Contents

    Service Instructions Table of Contents 074985 Rev. B October 2014 Table of Contents Section 1: Introduction Section 2: Support Items and Tools Support Items ................... 3 Tools ......................3 Section 3: Bettis Reference Materials Section 4: General Section 5: General Disassembly Section 6: Pressure Cylinder Disassembly Section 7: Housing Group Disassembly Section 8: General Reassembly...

  • Page 4: Section 1: Introduction

    Section 1: Introduction Service Instructions October 2014 074985 Rev. B Section 1: Introduction This service procedure is offered as a guide to enable general maintenance to be performed on Bettis, HD732-S, HD732 M3-S, and HD732 M3HW-S hydraulic series actuators. SAFETY STATEMENT: Products supplied by Bettis, in its "as shipped" condition, are intrinsically safe if the instructions contained within this Service Instruction are strictly adhered to and executed by a well-trained, equipped, prepared and competent technician.
  • Page 5 Section 1: Introduction Service Instructions 074985 Rev. B October 2014 BASIC SERVICE INFORMATION: Complete actuator refurbishment requires the actuator be dismounted from the valve or device it is operating. The maximum recommended service interval for this actuator series is five years.

  • Page 6: Section 2: Support Items And Tools

    Section 2: Support Items and Tools Service Instructions October 2014 074985 Rev. B Section 2: Support Items and Tools Support Items Service/Seal Kit, commercial leak testing solution, and non-hardening thread sealant. Tools All tools are American Standard inch. Two each medium standard screwdriver, small standard screwdriver with corners rounded, putty knife, rubber or leather mallet and a torque wrench (up to 2,000 inch-pounds).

  • Page 7: Section 3: Bettis Reference Materials

    Service Instructions Section 3: Bettis Reference Materials 074985 Rev. B October 2014 Section 3: Bettis Reference Materials Assembly Drawing Part Number 036278*. Exploded Detail Drawing 063356* for HD732 actuators. Exploded Detail Drawing 068112* for HD732 M3 and HD732 M3HW actuators. * The drawings called out in the above Steps 1 through 3 are for pneumatic operated actuators and will not call out the bleed valves (2-120) or the drain pipe plugs (2-130) that are located in the cylinder adapters (2-30) or in the cylinders (3)/(3-10).

  • Page 8: Section 4: General

    Section 4: General Service Instructions October 2014 074985 Rev. B Section 4: General This procedure should only be implemented by a technically competent technician who should take care to observe good workmanship practices. Numbers in parentheses( ), indicate the bubble number (reference number) used on the GH-Bettis Assembly Drawing, Exploded Detail Drawing, and actuator Part List.

  • Page 9: Section 5: General Disassembly

    Service Instructions Section 5: General Disassembly 074985 Rev. B October 2014 Section 5: General Disassembly If not already done, remove all operating pressure from actuator cylinder (3) or cylinder assemblies M3 (3-10). If the actuator is equipped with a M3 jackscrew, make sure that the jackscrew (3-20) does not engage the piston rod (2-10).

  • Page 10: Section 6: Pressure Cylinder Disassembly

    Section 6: Pressure Cylinder Disassembly Service Instructions October 2014 074985 Rev. B Section 6: Pressure Cylinder Disassembly The following steps may be performed on one cylinder and then on the other cylinder or simultaneously on both cylinders. Secure the chain wrench around cylinder (3) or cylinder assembly M3 (3-10) as close to the welded end cap as possible.

  • Page 11: Section 7: Housing Group Disassembly

    Service Instructions Section 7: Housing Group Disassembly 074985 Rev. B October 2014 Section 7: Housing Group Disassembly Remove cover screw (1-30) and gasket seals (6-80). Remove housing cover (1-20). NOTE: Housing cover has a tight fit and will require the use of two pry bars or screw drivers to assist in removal.

  • Page 12: Section 8: General Reassembly

    Section 8: General Reassembly Service Instructions October 2014 074985 Rev. B Section 8: General Reassembly CAUTION: INSTALL ONLY NEW SEALS INTO ACTUATOR Only new seals, that are still within the seals expectant shelf life, should be install back into actuator being refurbished. Remove and discard all seals and gaskets.

  • Page 13: Section 9: Center Housing Group Reassembly

    Service Instructions Section 9: Center Housing Group Reassembly 074985 Rev. B October 2014 Section 9: Center Housing Group Reassembly If removed, install a pipe plug (1-100) into the drain port of housing (1-10). Coat one O-ring seals (6-20) with lubricant and install into the housing (1-10). Apply lubricant to the yoke bore in housing (1-10), raised ribs in the bottom of the housing.

  • Page 14: Section 10: Pressure Cylinder Reassembly

    Section 10: Pressure Cylinder Reassembly Service Instructions October 2014 074985 Rev. B Section 10: Pressure Cylinder Reassembly NOTE: Seals and parts being used in the assembly of cylinders (3) or (3-10) should use hydraulic fluid as the assembly lubricant. Where Section 10 indicates to "coat or apply fluid", use hydraulic fluid for lubricating the part being installed.
  • Page 15 Service Instructions Section 10: Pressure Cylinder Reassembly 074985 Rev. B October 2014 Low Temperature Actuators: Coat piston seal grooves with fluid. Apply fluid to piston T-Seal (6-10). Seal is composed of rubber seal and two back up rings. The rings serve as anti-extrusion backups. Install T-Seal (6-10) into piston seal groove - outboard side of piston (2-20).

  • Page 16: Section 11: Actuator Testing

    Section 11: Actuator Testing Service Instructions October 2014 074985 Rev. B Section 11: Actuator Testing All areas, where leakage to atmosphere may occur, are to be checked using a leak testing solution. If excessive leakage is noted (generally a bubble which breaks three seconds or less after starting to form), the actuator must be disassembled and the cause of leakage must be determined and corrected.
  • Page 17 Service Instructions Section 11: Actuator Testing 074985 Rev. B October 2014 The pressure inlet port hole in the end of the right side cylinder, checks the piston to cylinder wall and piston to piston rod seals. The threaded joint between the right side cylinder and right side cylinder adapter (2-30), checks the cylinder to cylinder adapter O-ring seal.

  • Page 18: Section 12: Return To Service

    Section 12: Return to Service Service Instructions October 2014 074985 Rev. B Section 12: Return to Service Replace the software components of the snubber (1-130) and then install the snubber into the housing (1-10). Adjust both stop screws (1-60) back to settings recorded in Section 5 under General Disassembly.

  • Page 19: Section 13: M3 Jackscrew Disassembly

    Service Instructions Section 13: M3 Jackscrew Disassembly 074985 Rev. B October 2014 Section 13: M3 Jackscrew Disassembly With the cylinder (3-10) on a work bench, lubricate jackscrew assembly (3-20) threads with lubricant. Using a 3/16 inch pin punch, drive out and remove the spiral pin from the outboard slotted nut.

  • Page 20: Section 14: M3 Jackscrew Reassembly

    Section 14: M3 Jackscrew Reassembly Service Instructions October 2014 074985 Rev. B Section 14: M3 Jackscrew Reassembly Apply a light coating of lubricant to the threads of jackscrew assembly (3-20). Insert the jackscrew assembly (3-20) through the open end of cylinder (3-10). Screw the jackscrew into the cylinder end cap until the end of the assembly protrudes out of the end cap of the cylinder.
  • Page 21 Service Instructions Section 14: M3 Jackscrew Reassembly 074985 Rev. B October 2014 Table 1. Tool Style and Wrench Sizes Actuator Model Approximate Weight [Pounds} 732-S 732 M3-S 732 M3HW-S Table 2. Tool Style and Wrench Sizes Recommended Item No. Wrench Size Quantity Description Wrench Style...

  • Page 22: Section 15: Document Revision

    Section 15: Document Revision Service Instructions October 2014 074985 Rev. B Section 15: Document Revision Table 3. Revision Overview DATE BY * DATE Released October 1994 COMPILED Colby 22 June 2006 19110 July 2006 CHECKED John R 22 June 2006 APPROVED David McGee 18 July 2006...

  • Page 23: Appendix A: List Of Drawings

    Service Instructions Appendix 074985 Rev. B October 2014 Appendix A: List of Drawings Part No. VA036278, HD522/722/732-M3/HW, Assembly Drawing Appendix...
  • Page 24 Appendix Service Instructions October 2014 074985 Rev. B Part No. VA063356, HD732 Actuator, Exploded Detail Drawing Appendix...
  • Page 25 Service Instructions Appendix 074985 Rev. B October 2014 Part No. VA063356, HD732-M3/HD732-M3/HW Actuator, Exploded Detail Drawing Appendix...
  • Page 27 Tianjin 301700 Holland Fasor 6 P. R. China Székesfehérvár 8000 The Emerson logo is a trademark and service mark of Emerson Electric Co. T +86 22 8212 3300 Hungary Bettis is a mark of one of the Emerson family of companies.

This manual is also suitable for:

Hd732-sHd732 m3hw-sHd732 m3-s

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