Kobelt 7174 Instruction Manual

(Rev A)
7174 Rudder Feedback Unit
Owner’s Operation, Installation &
Maintenance Manual

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 2 of 21
NOTES:
RECORD DATA BEFORE INSTALLATION FOR FUTURE REFERENCE
Model #:
Serial #:
Date of Purchase:
Date of Installation:

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 3 of 21
TABLE OF CONTENTS
1Introduction .......................................................................................................... 4
1.1 Contact .......................................................................................................................4
1.2 Compliant Use ............................................................................................................4
1.3 Copyrights & Trademarks...........................................................................................4
2Safety.................................................................................................................... 5
2.1 Safety Alerts ...............................................................................................................5
2.2 Notice to Installer.......................................................................................................5
2.3 Product Hazards .........................................................................................................6
3Product Description ............................................................................................... 7
3.1 Technical Specifications .............................................................................................8
3.2 Model Code Key .........................................................................................................8
4Installation............................................................................................................ 9
4.1 Mechanical .................................................................................................................9
4.2 Electrical ...................................................................................................................10
5Commissioning.................................................................................................... 13
5.1 Electrical Check.........................................................................................................13
6Maintenance ....................................................................................................... 14
6.1 Preventative Maintenance.......................................................................................14
6.2 Service ......................................................................................................................14
6.3 Recommended Spare Parts......................................................................................15
7Troubleshooting .................................................................................................. 16
8Warranty............................................................................................................. 17
9Appendix A: Installation Dimensions .................................................................... 18
10 Appendix B: Parts List .......................................................................................... 19

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 4 of 21
1INTRODUCTION
1.1 CONTACT
Kobelt Manufacturing Co. Ltd.
8238 129th Street
Surrey, British Columbia
Canada, V3W 0A6
Sales Tel:
Fax:
Email:
Website:
[phone]
[phone]
[email protected]
www.kobelt.com
This document is intended to clearly present comprehensive product data and provide
technical information to assist the end user in design applications. 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.
Kobelt recommends that customers visit our website to check for updates to this Manual.
Once a product has been selected for use, it should be tested by the user to ensure proper
function in all possible applications. For further instructions, please contact our distributors or
visit our website.
1.2 COMPLIANT USE
This device is only intended for use by persons trained in operating marine systems.
The installer shall:
•Only use non-defective products.
•Check the safety of operation and the condition of the device before each use.
•Verify that the product is operational at all times and keep it in good working
conditions.
Only Kobelt Manufacturing Co. Ltd. Authorized Dealers or Authorized Technicians are to
repair Kobelt products.
1.3 COPYRIGHTS &TRADEMARKS
All product names, logos and brands are property of their respective owners. All company,
product and service names used in this manual are for identification purposes only. Use of
these names, logos, and brands does not imply endorsement.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 5 of 21
2SAFETY
2.1 SAFETY ALERTS
Throughout this manual, the following symbols, and their accompanying explanation, are
used to alert the user to special instructions concerning a service or operation that may be
hazardous if performed incorrectly or carelessly. The associated risk levels are stated below.
This symbol indicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury.
This symbol indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
This symbol indicates a hazardous situation, which if not avoided,
could result in minor or moderate injury.
This symbol informs the reader of events not related to personal
injury but which there is a risk of damage to property or equipment.
This symbol informs the reader of safety-related instructions or
procedures.
2.2 NOTICE TO INSTALLER
Disregarding the following safety measures can result in an accident, causing severe injury to
personnel and damage to material assets.
•Only use the product as directed in this manual.
•Never put the product into service if there is evidence of visible damage.
•Never put the product into service before fully completing installation and
commissioning.
•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. (For the purpose of this manual, qualified personnel are persons
who are familiar with the assembly, installation, commissioning, and operation of the
product and who have the qualifications necessary for their occupation.)
•Observe all specifications in this manual. If these guidelines are not followed and
damage occurs, the warranty will be voided.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 6 of 21
2.3 PRODUCT HAZARDS
Disconnect Power: Turn off power at distribution panel before
beginning installation to protect installer from electrical hazards.
Voltage and Current Compatibility: Confirm that the power source
is compatible with the maximum voltage and current ratings of is
product variant. Failure to do so could result in damage or fire.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 7 of 21
3PRODUCT DESCRIPTION
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.
Movement of the rudder adjusts the internal potentiometer(s). The 7174 Rudder Feedback
Unit can be used for steering applications, other marine applications, or industrial
installations.
The 7164 is designed for indoor and outdoor installation with a robust die cast bronze and
stainless-steel construction to provide a long service life in a harsh marine and salt-water
exposed environment.
Figure 1: 7174 Overview Diagram

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 8 of 21
3.1 TECHNICAL SPECIFICATIONS
Table 1: 7174 Technical Data –Standard Variants
MODEL
7174
KOBELT PART #
7174-A
7168-B
POTENTIOMETER
1kΩ
2x 1kΩ
MAX. POTENTIOMETER POWER
1 W
SWITCH CONTACTS
2x DPDT
2x DPDT
CONTACT RATINGS
250VAC/24VDC –10A
CONNECTIONS
1x 3C/18 Pigtail
2x 3C/18 Pigtail
OPERATING TEMPERATURE
-25°C to 70°C [-13°F to 158°F]
PRODUCT WEIGHT
2.9 kg [6.5 lbs]
SURFACE FINISH
Plain Bronze
Technical data and specifications are also available from our datasheet posted on
www.kobelt.com or the technical drawings in Appendix A.
3.2 MODEL CODE KEY

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 9 of 21
4INSTALLATION
4.1 MECHANICAL
Ideally, the Rudder Feedback Unit should be mounted as close as possible to the tiller arm.
Excessive lengths of connecting rods will lead to flexing and inaccuracies in the reported
rudder position.
Minimize the connecting rod length to minimize errors in reported
rudder position.
The Rudder Feedback Unit is equipped with (3) three ¼ UNC screws installed through the top
surface for direct mounting. Reference the general arrangement drawing in Appendix A for
the bolt pattern.
4.1.1 Mechanical Linkage
The RFU lever is provided with seven 5/16” [8mm] diameter holes on a 5/8” [16 mm] pitch.
Select the outer most hole on the RFU lever possible to minimize errors arising from backlash.
Locate the connecting rod position on the tiller arm to ensure that rudder stop limit switches
trip without crashing into the RFU end stops (+/-44o). Follow the table below to ensure that
the gearing between rudder movement and RFU are synchronized:
Table 2: RFU to tiller Synchronization
When installing the RFU remember to follow these tips:
•Ensure 90° relationships between the tiller arm, RFU lever and connecting link are
maintained with the rudder in mid-ships position during alignment of all
mechanical components.
•Ensure rudder feedback arm and rudder stock clamp swing equally each side of
mid-ships position.
7174
Rudder Movement
(H.O. to H.O.)
(deg)
Travel
Ratio
Dimension
‘R’
in [mm]
70
1.16:1
9.04 [230]
74
1.11:1
8.62 [219]
80
1.04:1
8.07 [205]
84
1.00:1
7.75 [197]
90
0.95:1
7.33 [186]
94
0.91:1
7.09 [180]

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 10 of 21
•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.
Reference the figure below for clarification.
Note: Connection kits are available from Kobelt (P/N: 7174-010X).
4.2 ELECTRICAL
When making the electrical connections, locate the electrical junction box;
•Within 6 feet [1.8 m] of the rudder feedback unit.
•Placed as to protect external electrical cable from damage.
The cable gland locations are shown in Error! Reference source not found. and the internal
wire connections are shown in Figure 3: 7174 Potentiometer Wiring Diagram and Figure 4:
7174-XG Internal Wiring Diagram respectively.
The operating direction of the Potentiometer in relation to the Rudder Feedback Unit handle
is shown in Error! Reference source not found..
The product’s 3C/18AWG electrical cable contains the following wires and related functions:
Figure 2: RFU Installation

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 11 of 21
Table 3: 7174 Wire Connections
7174
Wire #
Wire Name
Colour
Gauge
Function
1
POT+
White
18AWG
FFU potentiometer power supply
connection.
2
POT WIPER
Green
18AWG
FFU potentiometer signal connection.
3
POT-
Black
18AWG
FFU potentiometer ground connection.
Figure 3: 7174 Potentiometer Wiring Diagram

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 12 of 21
Figure 4: 7174-XG Internal Wiring Diagram
When wiring the rudder end stop switches directly to the steering solenoid valves, it is
recommended to place a 1N4007 protection diode across the coil terminals.
Failure to use a TVS diode when switching solenoid coils will reduce
the life of the rudder end stop switches.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 13 of 21
5COMMISSIONING
5.1 ELECTRICAL CHECK
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.
•Confirm that the rudder range of motion is reported correctly to the rudder angle
indicators and steering controller.
•Ensure that the rudder end stop switches trip before the rudder or RFU lever
impacts the rudder stops. See section 6.2.1 for adjusting.
The Functional Test should be carried out while the vessel is still at
dock and before it is taken out to sea after installation has been
completed.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 14 of 21
6MAINTENANCE
6.1 PREVENTATIVE MAINTENANCE
•Quarterly (4 times/year)
oVisually inspect wire and cable insulation for splits or damage.
oEnsure there is no visible corrosion on the unit.
oConfirm that the rudder angle indicators indicate zero degrees when
the rudder is centered
•Every (2) two years
oConfirm all electrical screw terminals are secured.
oConfirm cable glands are secured to cables.
6.2 SERVICE
6.2.1 Rudder End-stop Switches
To adjust the rudder end-stop trip position follow these instructions:
1. Position the rudder to the desired trip position.
2. Remove the RFU cover.
3. Locate the relevant switch trip cam (see Figure 1: 7174 Overview Diagram).
4. Loosen the two screws and rotate the cam until the switch just trips and secure
the two screws.
5. Repeat for the other switch.
6.2.2 Potentiometer Centering
When replacing the potentiometer or if the setting has become disturbed, follow these steps
to center the output:
1. Position the rudder in the center
(dead ahead) position.
2. Remove the RFU cover.
3. Locate the potentiometer in need of
centering (see Figure 1: 7174
Overview Diagram).
4. Connect a multimeter to the Pot –
(white wire) and the Pot Wiper
(green wire). Set the meter to read
resistance.
5. Loosen the two locking set screws
on the pinion gear with a 1/16-inch
Allen key.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 15 of 21
6. Using a short flat head screwdriver, rotate the potentiometer shaft until the meter
reads half of the rated output (500 ohms for a 1K potentiometer).
7. Tighten the two locking set screws and replace the cover.
6.3 RECOMMENDED SPARE PARTS
Depending on the severity and criticality of service, it may be necessary to keep spare
potentiometers on hand.
When purchasing replacement parts refer to Appendix B: Parts List at the back of this manual
for Kobelt component Part Numbers.
It is recommended that any required service work on a Kobelt
product be performed by a factory authorized service
representative. Please contact the nearest Kobelt authorized
distributor for assistance.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 16 of 21
7TROUBLESHOOTING
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
Problem
(Issue encountered)
Cause
(What it means)
Corrective Action
(What to do)
Rudder Feedback Unit
action is reversed.
Wiring is backwards.
Swap the POT+ and POT- output
wires to their respective system
connections.
Rudder Feedback Unit
does not move rudder
at all.
The rest of the system
isn’t hooked up correctly.
1. Check system wiring.
2. Confirm wiring to Rudder
Feedback Unit.
Broken potentiometer or
contact.
1. Use a multi-meter to monitor
the resistance of the wiring
between potentiometer contacts.
2. Check for normal operation of
the potentiometer by measuring
the connection while moving the
Rudder Feedback Unit.
3. Check potentiometer directions.
4. Replace any damaged
potentiometers.
Wiring is wrong.
Check wiring against User Manual
wiring diagrams for Feedback Unit
and connected Products.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 17 of 21
8WARRANTY
Kobelt Manufacturing Co. Ltd. (“Kobelt”) warrants the Products and Parts manufactured by
Kobelt to be free from defects in workmanship or material and that said products are
designed mechanically and functionally to perform to specifications.
This warranty is effective providing:
•The equipment is used within the intended operating conditions and in accordance with
Kobelt recommendations
•The equipment is installed according to equipment diagrams, specifications and
recommendations which Kobelt has provided
This warranty becomes invalid if the factory supplied serial number has been removed or
altered on the product. This warranty does not cover cosmetic damage or damage caused by
an act of God, accident, misuse, abuse, negligence or modification of any part of the product.
This warranty does not cover damage due to improper operation or maintenance, connection
to inappropriate equipment or attempted repair by anyone other than an authorized Kobelt
representative.
Upon identification of a potential issue or defect with a Kobelt Product or Part, the Warranty
Applicant (“Applicant”) must immediately contact Kobelt and describe the issue in writing, by
letter, fax, email or other electronic conveyance. Kobelt will then assess the cause of the
defect and determine warranty applicability and appropriate remediation.
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. Kobelt’s sole obligation to the Applicant will be to
repair or replace the defective part with same or similar product, to a maximum value of the
list price of the product or part. The Kobelt warranty does not cover labour charges, travel or
any other associated expenses.
All Products and Parts manufactured by Kobelt, are subject to a warranty against
manufacturer’s defects in materials or workmanship for a period of two (2) years from the
date of purchase.
Kobelt will be responsible for all Products or Parts sold by Kobelt but manufactured by 3rd
party manufacturing companies. However, these products and parts are subject to applicable
3rd party warranties and may not be the same as the Kobelt warranty.

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 18 of 21
9APPENDIX A: INSTALLATION DIMENSIONS

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 19 of 21
10 APPENDIX B: PARTS LIST
Figure 5: 7174-CP Parts Diagram

7174 Rudder Feedback Unit Kobelt Manufacturing Co. Ltd.
Rev A mnl7174.docx 20 of 21
ITEM QTY. PART NUMBER DESCRIPTION
1 1 7174-0001 HOUSING
2 1 7174-0002 BOTTOM PLATE; RUDDER FEED BACK UNIT
3 1 7174-0003 LEVER; RUDDER FEEDBACK UNIT
4 3 7174-0009 SPACER, BRASS
5 1 7174-0010 SHAFT
6 4 6001-0248 CABLE GLAND; M16 X 1.5, .197-.394 CABLE, PA6, BLACK
7 4 6001-0248-W-M16 WASHER, SEALING, M16, POLYETHYLENE
8 1 1001-1020 SCREW - HEX HD; 1/4-20 X 1-1/4, 18-8
9 3 1001-1048 1/4-20 X 3.0, HEX HD. CAPSCREW, SS
10 4 1010-0808 SCREW RND HD PHIL #10-24 X 1/2 18-8
11 6 7174-0008 SPACER, 7172, 1.04IN LG
12 1 7174-0007 POT BRACKET
13 2 6001-0104 MICROSWITCH
14 1 7174-0006 BRACKET; RUDDER FEEDBACK UNIT
15 3 1002-0840 SCREW SKT HD 10-24 X 2 1/2 SS
16 1 1101-0016 O-RING, 3/4 X 5/8 X 1/16, NBR70
17 1 7174-0004 CAM PLATE
18 4 POT-1 POTENTIOMETER, 1K, 1TURN, 340 DEG, 22MM DIA
19 4 6639-0001 WASHER, FLAT, 10MM X 2MM, AISI 304
20 4 Y-3220 GEAR, 32 PITCH, 20 TEETH, 2 SET SCREWS, 1/4 BORE
21 1 YPB-3264 SPUR GEAR 64T DERLIN W/ 5/16 BRASS INSERT
22 4 1006-0310 SCREW, PAN HD SLOTTED, 3-48 X 5/8, 18-8
23 1 7174-0027 GASKET
24 2 7174-0005 CAM
25 4 1012-0606 SCREW, PAN HD, PHL DRIVE, 6-32 x 3/8IN, 18-8 SS
Heiko Epkens
Digitallysignedby Heiko Epkens
Date:2021.01.1115:53:22 -08'00'