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Kohler 6EKOD - Service Manual

Kohler 6EKOD
120 pages
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Marine Generator Sets
Models:
6EKOD
5EFKOD
9--11EKOZD
7--9EFKOZD
TP-6774 2/14a
Service

Table of Contents

Other manuals for Kohler 6EKOD

Questions and Answers

  • U
    usmithSep 14, 2025
    How to bleed the diesel fuel system in Kohler Inverter?
    • C
      Christopher VasquezSep 14, 2025
      If there is air in the fuel system of your diesel Kohler Inverter, bleed the diesel fuel system to remove the air.
  • J
    Jimmy VasquezAug 25, 2025
    What to do if the battery is weak in Kohler Inverter?
    • D
      Debbie JohnsonAug 25, 2025
      If the battery of your Kohler Inverter is weak or dead, recharge or replace it. Refer to the spec sheet for the recommended battery CCA rating.
  • E
    Erin RiceAug 25, 2025
    What to do if Kohler Inverter shows low oil pressure shutdown?
    • J
      jennifer78Aug 26, 2025
      If your Kohler Inverter experiences a low oil pressure shutdown, replace the low oil pressure switch. Also, check the engine for any potential damage.
  • A
    Ashley JohnsonNov 27, 2025
    Why does my Kohler Marine Equipment generator stop suddenly?
    • K
      Kimberly WalshNov 27, 2025
      If your Kohler Marine Equipment generator stops suddenly, check the controller’s display for a fault shutdown code and correct the fault, then reset the controller. Also, check the fuel supply, fuel lines, and fuel filter for any blockages. Replace the controller fuse (F2) and check the wiring to the controller. Replace the auxiliary winding fuse (F1); if it blows again, test the generator components. If the engine is hot, check the air intake, fuel, oil level, and air inlet/outlet. For low oil pressure, attempt startup; if the unit shuts down and displays 'Oil Pres Low Shutdwn', remove the lead from the LOP sender and reset the controller. A successful restart indicates a faulty LOP shutdown sender. Reduce the electrical load if the engine is overloaded. Check connections at the P2 plug a...
  • A
    Aaron CarrilloSep 15, 2025
    What to do if fuel injectors are faulty in Kohler Inverter?
    • D
      darrylmaynardSep 15, 2025
      If the fuel or fuel injectors are dirty or faulty in your diesel Kohler Inverter, clean, test, and/or replace the inoperative fuel injector.
  • J
    Jordan DixonSep 23, 2025
    What to do if there is a controller fault in Kohler Inverter?
    • K
      kimberly54Sep 23, 2025
      If the controller of your Kohler Inverter has a fault, troubleshoot the controller.
  • P
    Pamela AriasSep 7, 2025
    How to reduce noisy operation in my Kohler 6EKOD?
    • M
      Mark SmithSep 7, 2025
      If your Kohler Marine Equipment generator is operating with noisy operation, check the exhaust system for leaks and replace as necessary. Retighten screws and replace rivets on any loose or vibrating sheet metal or housing.
  • J
    Justin MoyerSep 8, 2025
    What to do if the AC output circuit breaker is open in Kohler Inverter?
    • J
      James WilcoxSep 8, 2025
      If the AC output circuit breaker is open in your Kohler Inverter, reset the breaker. Then, check for AC voltage on the generator side of the circuit breaker.
  • J
    Joseph RuizSep 23, 2025
    What to do if the low oil pressure switch is inoperative in Kohler Inverter?
    • R
      Ronnie LewisSep 23, 2025
      If the low oil pressure switch is inoperative in your Kohler Inverter, replace the low oil pressure switch. Check the engine for damage.
  • M
    mwatsonAug 31, 2025
    How to troubleshoot erratic operation of my Kohler 6EKOD?
    • R
      Ryan DuncanSep 1, 2025
      If your Kohler Marine Equipment operates erratically, adjust the governor stability. Clean the cylinder head to address potential carbon buildup in the engine. Check cylinder pressures with a leakdown test and inspect the valves and valve seats to ensure the engine valves are seating correctly.

Summary

Service

Marine Generator Sets

Main category of products covered by this service manual.

Product Identification Information

Generator Set Identification Numbers

Section for recording generator set identification numbers for service.

Engine Identification

Section for recording engine identification numbers for service.

Safety Precautions and Instructions

Accidental Starting

Procedures to prevent accidental generator set starting and associated hazards.

Engine Backfire;Flash Fire

Warnings and precautions regarding fire hazards related to the engine and fuel.

Exhaust System

Safety warnings concerning exhaust gases, carbon monoxide, and system integrity.

Fuel System

Safety precautions for handling fuel, preventing vapor ignition, and ensuring fuel system integrity.

Hazardous Noise

Warning about potential hearing damage from generator noise and muffler requirements.

Hazardous Voltage;Moving Parts

Warnings about electrical hazards, grounding, and dangers from moving parts.

Hot Parts

Caution regarding hot engine components like coolant and steam, and safe pressure cap removal.

Notice

Important notes on fuse replacement, saltwater damage, and general equipment care.

Introduction

Service Assistance

Information on contacting Kohler for technical support, service, and parts.

Section 1 Specifications

1.1 General

Overview of generator set models covered and general operational ratings.

1.2 Engine

Detailed technical specifications for the generator set engines.

1.3 Generator, 4 Lead

Electrical specifications for 4-lead generator configurations.

1.4 Generator, 12 Lead

Electrical specifications for 12-lead generator configurations.

1.5 Service Views

Diagrams identifying key components and their locations on the generator set.

1.6 Torque Specifications

Recommended torque values for various fasteners and components during assembly.

Section 2 Scheduled Maintenance

2.1 General

Guidelines for routine maintenance scheduling and precautions for seawater environments.

2.2 Lubrication System

Recommendations for engine oil selection based on API and SAE standards for optimal lubrication.

Section 3 Exhaust System

3.1 Exhaust System Inspection

Procedures for inspecting the exhaust system for leaks, blockages, and carbon monoxide hazards.

3.2 Servicing Mixing Elbow

Steps for checking and cleaning the exhaust mixing elbow for carbon buildup and corrosion.

Section 4 Fuel System

4.1 General

Description of typical fuel system arrangements and considerations for low fuel conditions.

4.2 Fuel Filter

Procedure for replacing the fuel filter element to maintain fuel cleanliness.

4.2.1 Fuel System Bleed

Method for bleeding air from the fuel system to prevent rough running or vapor lock.

4.3 Fuel Pump

Procedure for testing the fuel pump's operation and verifying output pressure.

4.4 Governor

Information on the mechanical governor's function in maintaining engine speed under load.

4.5 Fuel Solenoid

Description of the 2-lead fuel solenoid and its role in fuel flow control.

Section 5 Cooling System

5.1 General

Overview of the heat exchanger cooling system components and their functions.

5.2 Water-Cooled Exhaust Manifold

Description of the water-cooled exhaust manifold and thermostat location within it.

5.3 Coolant Replacement Including Heat Exchanger Service

Procedure for draining, cleaning, and servicing the heat exchanger to maintain cooling efficiency.

5.4 Check and Fill Coolant

Instructions for checking and filling the engine coolant level with the correct mixture.

5.5 Flush and Clean Cooling System

Procedure for flushing and cleaning the cooling system to remove contaminants and ensure optimal performance.

5.6 Pressure Cap

Information on the pressure cap's function in raising boiling points and its replacement criteria.

5.7 Impeller Inspection and Replacement

Procedure for inspecting and replacing the seawater pump impeller for cooling system operation.

5.8 Belt Tension

Guidelines for checking and adjusting belt tension to ensure proper component operation.

5.8.1 Seawater Pump Belt Tensioning Procedure

Specific steps for adjusting the seawater pump belt tension correctly.

5.9 Anticorrosion Zinc Anode

Procedure for checking and replacing the anticorrosion zinc anode to prevent electrolytic corrosion.

5.10 Siphon Break

Procedure for inspecting the siphon break mechanism to prevent seawater entry into the engine.

Section 6 Troubleshooting

6.1 Introduction

Guidance on troubleshooting procedures and the importance of professional service.

6.2 Initial Checks

Basic checks for common problems like connections, battery, and fuses before component replacement.

6.3 Troubleshooting Chart

A comprehensive chart listing problems, possible causes, corrective actions, and references for diagnosis.

Section 7 Controller

7.1 Introduction

Overview of the ADC IId controller's operation, configuration, adjustment, and replacement.

7.2 General Repair Information

General guidelines for controller repair, software updates, and verifying connections.

7.3 SiteTecht Software

PC requirements and resources for using the SiteTecht software for controller configuration.

7.4 Controller Service Replacement Kit GM83745

Procedure for replacing the ADC IId controller, including configuration verification.

7.5 Advanced Digital Control IId Operation

Details on the controller's interface, controls, indicators, and operational modes.

7.6 Communication Port

Information about the USB communication ports for PC connections and mass storage devices.

7.7 Fuses

Identification and function of fuses located on the junction box for circuit protection.

7.8 Preheat Relay

Description of the preheat relays that power the engine glow plugs for cold starting.

7.9 Battery Charging Module

Function of the battery charging module in maintaining the starting battery voltage.

7.10 Controller Logic Specifications

Details on inhibit and time delays for fault shutdowns and warnings, and their specifications.

7.11 Menu Displays

Guide to understanding the controller's menu structure, navigation, and selectable options.

7.12 Monitoring and Programming Setup

Instructions for accessing controller data via display or PC.

7.13 Reviewing Menu Displays

Guide to navigating and understanding controller menu displays, including error messages.

Section 8 Component Testing and Adjustment

8.1 Theory of Operation

Explains the basic principles of generator operation and how AC voltage is produced and regulated.

8.2 Separate Excitation

Procedure for testing generator output using an external voltage source to diagnose issues.

8.3 Exciter Field (9-11 EKOZD;7-9 EFKOZD Models)

Test procedure for the exciter field resistance and short-to-ground conditions.

8.4 Exciter Armature (9-11 EKOZD and 7-9 EFKOZD Models)

Test procedure for the exciter armature resistance and short-to-ground conditions.

8.5 Slip Rings (6 EKOD;5 EFKOD Models)

Guidelines for inspecting and cleaning slip rings for proper brush contact.

8.6 Brushes (6 EKOD;5 EFKOD Models)

Information on brush inspection, positioning, and resistance checks for optimal current transfer.

8.7 Rectifier Module (9-11 EKOZD and 7-9 EFKOZD Models)

Test procedure for the rectifier module diodes to ensure AC to DC conversion.

8.8 Rotor

Test procedure for the generator rotor main field resistance and short-to-ground conditions.

8.9 Stator

Test procedure for stator continuity and short-to-ground conditions to ensure winding integrity.

8.10 Voltage Regulator

Details on voltage regulator specifications, adjustments, and calibration procedures.

8.10.1 Voltage Regulator and Calibration Specifications

Details on the controller's voltage regulation function and calibration requirements.

8.10.2 Voltage Regulator Adjustments

Explanation of voltage adjustment, underfrequency unload, and gain settings for performance tuning.

8.10.3 Voltage Regulator

Displays voltage regulator adjustment, volt/Hz, gain, and stability values for fine-tuning.

8.11 Voltage Reconnection

Procedures for changing generator set output voltage by reconnecting leads.

8.12 Four-Lead Reconnection

Illustrates reconnection procedures for four-lead generator sets for different voltage configurations.

8.12.1 100-120-Volt Configurations

Wiring configurations for 100-120 volt systems using circuit breakers and appropriate wiring.

8.12.2 100-120;200-240-Volt Configurations

Wiring configurations for 100-120/200-240 volt systems, detailing circuit breaker selection.

8.12.3 200-240-Volt Configurations

Wiring configurations for 200-240 volt systems, including circuit breaker and jumper lead usage.

8.13 Twelve-Lead Reconnection

Procedure for reconnecting 12-lead generator sets for voltage changes and frequency adjustments.

8.14 Fault Shutdown Tests

Tests to verify the operation of generator set fault shutdown functions like overspeed and low oil pressure.

8.14.1 Controller Fault Shutdown Functions

Tests to verify operation of overspeed, overcrank, and temperature shutdowns via controller logic.

8.14.2 Fault Shutdown Senders;Switches

Procedures for testing oil pressure and seawater pressure sensors/switches for accurate shutdown signaling.

Coolant Temperature Sensor (CTS)

Procedure for testing the coolant temperature sensor resistance at various temperatures.

High Exhaust Temperature (HET) Switch

Information on the high exhaust temperature shutdown switch and its activation point.

8.15 Fuses

Identification and function of fuses in the control box, including their protective roles.

8.16 Continuity Checks

Procedures for checking continuity of various circuit components using an ohmmeter.

Section 9 Generator Disassembly;Reassembly

9.1 Disassembly

Step-by-step instructions for safely disassembling the generator set and its components.

9.2 Collector Ring and Bearing Replacement (6 EKOD;5 EFKOD Model)

Procedure for replacing collector rings and bearings on specific 6EKOD/5EFKOD models.

9.3 Reassembly

Step-by-step instructions for correctly reassembling the generator set after maintenance.

Section 10 Wiring Diagrams

10.1 Wiring Diagram Reference

Table referencing point-to-point and schematic wiring diagrams for various models.

10.2 Manual Marine (Ship-to-Shore) 2 Wire and 3 Wire Transfer Switches

Wiring diagrams for manual transfer switches with 2 and 3 wire configurations for shore power selection.

10.3 Manual Marine (Ship-to-Shore) 4 Wire Transfer Switch

Wiring diagrams for manual transfer switches with 4 wire configurations for shore power selection.

Appendix A Abbreviations

List of Abbreviations

List of abbreviations used throughout the manual for clarity.

Appendix B Common Hardware Application Guidelines

Fastener Application Guidelines

Guidelines for applying common hardware and fasteners, ensuring correct assembly techniques.

Appendix C General Torque Specifications

Fastener Torque Specifications

General torque specifications for American Standard and Metric fasteners used in assembly.

Appendix D Common Hardware Identification

Hardware Identification Guide

Visual guide for identifying common hardware head styles, nuts, and washers for proper selection.

Appendix E Common Hardware List

Hardware Part Numbers and Dimensions

Part numbers and dimensions for common hardware items, facilitating procurement and replacement.

Kohler 6EKOD Specifications

General IconGeneral
AC Frequency60 Hz
Genset Power Rating6kW
Fuel TypeDiesel
Power Output6000 W
Engine Type4-cycle

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