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Kobelt 7174 Owner's Operation, Installation & Maintenance Manual

Rudder feedback unit
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7174 Rudder Feedback Unit
Owner's Operation, Installation &
Maintenance Manual
Rev D
MNL-7174
1 of 44

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Summary of Contents for Kobelt 7174

  • Page 1 7174 Rudder Feedback Unit Owner’s Operation, Installation & Maintenance Manual Rev D MNL-7174 1 of 44...
  • Page 2 NOTES RECORD DATA BEFORE INSTALLATION FOR FUTURE REFERENCE Model #: Serial #: Date of Purchase: Date of Installation: Rev D MNL-7174 2 of 44...

  • Page 3: Table Of Contents

    Determination of microswitch generation ............28 11.2 Determination of Required Retrofit Kit .............. 29 Appendix D: Installing Microswitch Retrofit Kit ............. 30 12.1 7174-RF-01 – Two Switch RFUs ................30 12.2 7174-RF-02 – Four Switch RFUs ................. 37 Rev D MNL-7174...

  • Page 4: Introduction

    Kobelt reserves the right, without notice, to change the design, or construction, of any products and to discontinue or limit distribution of any products. Kobelt also reserves the right to change, or update, without notice, any technical information contained within this document.

  • Page 5: Safety

    • Do not carry out any modifications to the product. • Only use authentic Kobelt spare parts. • Observe all local regulations, directives and laws during the installation of this product. • All installation, commissioning, and maintenance work must only be conducted by qualified personnel.

  • Page 6: Product Hazards

    RODUCT ESCRIPTION The Kobelt 7174 Rudder Feedback Unit (RFU) can be configured to have up to four potentiometers and two rudder end stop switches per side. It can be used as an input to Full Follow Up (FFU) electronic steering systems, autopilots, and rudder angle indicators.
  • Page 7 Figure 2: Product overview, 7174-CE shown. Rev D MNL-7174 7 of 44...

  • Page 8: Model Code Key

    ODEL Rev D MNL-7174 8 of 44...

  • Page 9: Installation

    NSTALLATION ECEIPT Kobelt offers the 7174 rudder feedback unit in several configurations (reference section 3.2). Upon receipt of the device ensure that the model number and serial number are noted on the table in page 2 of this manual. The serial number can be found in the location noted at right.

  • Page 10: Electrical

    Ensure rudder feedback arm and rudder stock clamp swing equally each side of mid-ships position. • Locate 7174 Rudder Feedback Unit near rudder stock on a level surface. • Threaded connection rod may need to be adjusted in order to achieve the correct mounting geometry.
  • Page 11 Wire Name Colour Gauge Function FFU potentiometer power supply POT+ White 18AWG connection. POT WIPER Green 18AWG FFU potentiometer signal connection. POT- Black 18AWG FFU potentiometer ground connection. Figure 5: 7174 Potentiometer Wiring Diagram Rev D MNL-7174 11 of 44...
  • Page 12 Figure 6: 7174-A wiring Figure 7: 7174-B wiring Rev D MNL-7174 12 of 44...
  • Page 13 Figure 8: 7174-C wiring Figure 9: 7174-XG Internal Wiring Diagram Rev D MNL-7174 13 of 44...

  • Page 14: Commissioning

    Ensure that the rear cover is installed and secured before powering on the 7174. • Confirm that the electrical connections to the 7174 have been made. • Confirm that port and starboard rudder movements are displayed correctly at the rudder angle indicators.

  • Page 15: Service

    1K potentiometer). Tighten the two locking set screws and replace the cover. ECOMMENDED PARE ARTS Depending on the severity and criticality of service, it may be necessary to keep spare potentiometers on hand. Rev D MNL-7174 15 of 44...

  • Page 16: Troubleshooting

    If you encounter problems with the operation of your product, please refer to the trouble- shooting suggestions before contacting Kobelt for assistance. If the steps below do not resolve your issue, please reach out either Kobelt directly or our Dealers in your area. Table 4: Common Solutions...

  • Page 17: Warranty

    If any part is found to be defective, Kobelt will replace said part FOB the Kobelt factory provided that any such defective part is returned by the Buyer with freight and applicable forwarding charges prepaid by the Buyer.

  • Page 18: Appendix A: Installation Dimensions

    A: I PPENDIX NSTALLATION IMENSIONS Rev D MNL-7174 18 of 44...

  • Page 19: Appendix B: Parts List

    10 A B: P PPENDIX ARTS 7174-AD Figure 10: 7174-AD Parts Diagram Rev D MNL-7174 19 of 44...
  • Page 20 Table 5: BOM for 7174-AD ITEM QTY. PART DESCRIPTION NOTES NUMBER (SEC. 10.1) 7174-0001 HOUSING 7174-0002 COVER; RUDDER FEED BACK UNIT 7174-0003 LEVER; RUDDER FEEDBACK UNIT 7174-0009 SPACER, BRASS 7174-0010 SHAFT 6001-0248 CABLE GLAND; M16 X 1.5, .197-.394 CABLE, PA6, BLACK...
  • Page 21 TRIMPOT-1 POTENTIOMETER, TRIM, 10K, SINGLE TURN, 5/8 X 11/16 RECT 7174-0014 BRACKET, MICROSWITCH, 7174 1009-0304 SCREW, FLAT HD, PHP DR, 3-48 X 1/4, 18-8 6001-0112 MICROSWITCH, SUBMINIATURE, STRAIGHT LEVER, SPDT 10A 1012-3208 SCREW, PAN HD, PHP DR, M2-0.4 Rev D...
  • Page 22 7174-B Figure 11: 7174-B parts list Rev D MNL-7174 22 of 44...
  • Page 23 Table 6: BOM for 7174-B ITEM QTY. PART DESCRIPTION NOTES NUMBER (SEC. 10.1) 7174-0001 HOUSING 7174-0002- COVER; RUDDER FEED BACK UNIT; 4 HOLES 7174-0003 LEVER; RUDDER FEEDBACK UNIT 7174-0009 SPACER, BRASS 7174-0010 SHAFT 6001-0248 CABLE GLAND; M16 X 1.5, .197-.394 CABLE,...
  • Page 24 6014-0001 CABLE, 3C/18AWG, SVT, 300V, 105C 6014-0002 CABLE; 4C/18AWG, 600V, GRY 7174-0014 BRACKET, MICROSWITCH, 7174 1009-0304 SCREW, FLAT HD, PHP DR, 3-48 X 1/4, 18-5 6001-0112 MICROSWITCH, SUBMINIATURE, STRAIGHT LEVER, SPDT 10A 1012-3208 SCREW, PAN HD, PHP DR, M2-0.4 X 8, 18-8...
  • Page 25 Figure 12: 7174-BG parts list Rev D MNL-7174 25 of 44...
  • Page 26 Table 7: 7174-BG BOM ITEM QTY. PART DESCRIPTION NOTES NUMBER (SEC. 10.1) 7174-0001 HOUSING 7174-0002- COVER; RUDDER FEED BACK UNIT; 4 HOLES (BG-CG) 7174-0003 LEVER; RUDDER FEEDBACK UNIT 7174-0009 SPACER, BRASS 7174-0010 SHAFT, 7174 RFU CABLE GLAND; M16 X 1.5, .197-.394 CABLE,...

  • Page 27: Parts List Notes

    LG, 18-8 10.1 P ARTS OTES Contained in microswitch retrofit kits: 7174-RF-01 or 7174-RF-02. See section 11.1 and section 11.2 to determine if a retrofit kit is required or can purchase standalone part, and which microswitch kit is required. Rev D...

  • Page 28: Appendix C: Determining Rfu Generation And Required Retrofits

    11.1 D ETERMINATION OF MICROSWITCH GENERATION In mid 2023, rudder limit microswitches in the 7174 RFUs were replaced with a new style of microswitch. The newer generation microswitch requires a mounting bracket and different hardware for its implementation. Customers with RFUs purchased prior to this change will require a retrofit kit if they are replacing the microswitch.

  • Page 29: Determination Of Required Retrofit Kit

    3.2 to determine the amount of microswitches present in your RFU. Table 9: Determination of required retrofit kit Key Features Two microswitch RFU Four microswitch RFU Picture Required 7174-RF-01, one required per 7174-RF-02, one required per retrofit kit side. side. part No. Rev D MNL-7174...

  • Page 30: Appendix D: Installing Microswitch Retrofit Kit

    ETROFIT Replacing the microswitches requires soldering as well as correct placement of the microswitches. This should only be done by Kobelt factory authorized service representatives. Failure to do so result in a failure of the microswitch and a loss of control.
  • Page 31 Figure 13: Microswitch retrofit kit, 7174-RF-01 Table 10: 7174-RF-01 BOM 7174-RF-01 BOM Item Part Number Description 7174-0014 BRACKET, MICROSWITCH, 7174 MICRO SWITCH, SUBMINIATURE, STRAIGHT LEVER, 6001-0112 SPDT 10A 1012-3208 SCREW, PAN HD, PHP DR, M2-0.4 X 8, 18-8 1009-0304 SCREW, FLAT HD, PHP DR, 3-48 X 1/4, 18-8...
  • Page 32 It is recommended to fill out the colors of wire going to each terminal on the diagram shown in Figure 14. On the old microswitch, Kobelt PN 6001-0104, the terminals are labelled 1 and 2, and correspond to terminals 1 and 2 on the new microswitches.
  • Page 33 Install bracket ① with screws ④ into the RFU cover plate, 7174-0002, ensuring the engraved arrow is correctly orientated. Refer to Figure 15 and note the orientation of the microswitch② for the side of the RFU that the microswitch is being replaced on.
  • Page 34 Figure 15: Placement of microswitch and microswitch bracket, 7174-B shown. Rev D MNL-7174 34 of 44...
  • Page 35 Figure 14 as the wiring may have been altered in the field at original installation. This will ensure the RFU behaves in the same manner as prior to the retrofit. Rev D MNL-7174 35 of 44...
  • Page 36 17. Refer to section 5 for recommissioning the RFU once all the faulty switches have been replaced. Figure 16: Default factory wiring diagram of new microswitches, 7174-B shown. *Confirm wiring colors with unit prior to retrofit. Rev D MNL-7174...

  • Page 37: 7174-Rf-02 - Four Switch Rfus

    WITCH Replacing the microswitches requires soldering as well as correct placement of the microswitches. This should only be done by Kobelt factory authorized service representatives. Failure to do so could result in a failure of the limit switch and a loss of control.
  • Page 38 Note connections of all wires going to the old microswitches prior to disconnecting by filling in the colors of wires in Figure 18. On the old microswitch, Kobelt PN 6001-0104, the terminals are labelled 1 and 2, and correspond to terminals 1 and 2 on the new microswitches.
  • Page 39 13. Discard the old switch trip cam screws and spacers. 14. Apply Loctite 242(Blue) to the shorter screws⑤ included in the retrofit kit. 15. Replace the upper switch trip cam and secure with the shorter screws ⑤, leaving out the spacer. Rev D MNL-7174 39 of 44...
  • Page 40 Figure 19: Arrangement of switch trip cams old microswitch and new microswitch Rev D MNL-7174 40 of 44...
  • Page 41 This will ensure the RFU behaves in the same manner as prior to the retrofit. 20. It is recommended to apply heat shrink protective tubing to the exposed wire and connection terminals. Rev D MNL-7174 41 of 44...
  • Page 42 21. If the other microswitches are being replaced as well, repeat steps 1-18 on the microswitches on the other side. 22. Refer to section 5 for recommissioning the RFU once all the faulty switches have been replaced. Rev D MNL-7174 42 of 44...
  • Page 43 Figure 20: Wiring diagram, four switch model, 7174-BG shown. *Confirm wiring colors with unit prior to retrofit. Rev D MNL-7174 43 of 44...
  • Page 44 Kobelt Manufacturing Co. Ltd. 8238 129th Street Surrey, British Columbia, Canada, V3W 0A6 Sales Tel: +1-604-572-3935 Fax: +1-604-590-8313 Email: sales@kobelt.com Website: www.kobelt.com Made in Canada / Printed in Canada Rev D MNL-7174 44 of 44 Heiko Digitally signed by Heiko...

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