4.5L and 6.8L Marine Diesel Engines
(PowerTech™)
Copyright 2023 © Deere & Company. THIS DATA IS THE PROPERTY OF DEERE & COMPANY. ALL USE AND/OR REPRODUCTION NOT SPECIFICALLY AUTHORIZED BY DEERE & COMPANY IS PROHIBITED.
All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice.
OEM Engine and Drivetrain Warranty Registration
Foreword
Engine Owner
Download Instructions
Identification Views
Trademarks
Section 01 - Record Keeping
Engine Serial Number Plate
Record Engine Serial Number
Engine Option Codes
Record Fuel Injection Pump or High-Pressure Fuel Pump Model
Number
Record Engine Control Unit (ECU) Serial Number
Section 05 - Safety
Recognize Safety Information
Understand Signal Words
Follow Safety Instructions
Replace Safety Signs
Illuminate Work Area Safely
Work in Clean Area
Use Proper Tools
Live With Safety
Prevent Machine Runaway
Handle Fuel Safely—Avoid Fires
Prepare for Emergencies
Handle Starting Fluid Safely
In Case of Fire
Handle Fluids Safely—Avoid Fires
Avoid Static Electricity Risk When Refueling
Service Machines Safely
Wear Protective Clothing
Protect Against Noise
Handling Batteries Safely
Prevent Acid Burns
Stay Clear of Rotating Drivelines
Install All Guards
Practice Safe Maintenance
Remove Paint Before Welding or Heating
Avoid Heating Near Pressurized Fluid Lines
Avoid High-Pressure Fluids
Do Not Open High-Pressure Fuel System
Protect Against High Pressure Spray
Prevent Battery Explosions
Avoid Hot Exhaust
Work In Ventilated Area
Service Cooling System Safely
Decommissioning — Proper Recycling and Disposal of Fluids
and Components
Section 10 - Fuels, Lubricants, and Coolant
Diesel Fuel
Supplemental Diesel Fuel Additives
Lubricity of Diesel Fuel
Handling and Storing Diesel Fuel
Biodiesel Fuel
Testing Diesel Fuel
Fuel Filters
Minimizing the Effect of Cold Weather on Diesel Engines
Diesel Engine Break-In Oil — Non-Emissions Certified and
Certified Tier 1, Tier 2, Tier 3, Stage I, Stage II, and Stage III
Diesel Engine Oil — Marine Engines
Engine Oil and Filter Service Intervals — Tier 2 and Stage
II — Marine Engines
Mixing of Lubricants
Alternative and Synthetic Lubricants
Lubricant Storage
Oil Filters
Diesel Engine Coolant (engine with wet sleeve cylinder liners)
Water Quality for Mixing with Coolant Concentrate
Operating in Warm Temperature Climates
Testing Coolant Freeze Point
Disposing of Coolant
Section 15 - Instrument Panels
Sea Trials for Performance and Warranty
John Deere Instrument (Gauge) Panel (Mechanically Controlled
4045DFM70 Engines Only)
John Deere Instrument (Gauge) Panel (Electronically Controlled
Engines)
John Deere Instrument (Gauge) Panel (Electronically Controlled
Engines) (Continued)
Optional Electronic Displays to Monitor Engine and Navigation
PV101 Instrument Panels
PV101 Diagnostic Gauge — Using
PV101 Diagnostic Gauge — Main Menu
PV101 Diagnostic Gauge — Essential Menus
DG14 Diagnostic Gauge — Using
DG14 Diagnostic Gauge — Main Menu
DG14 Diagnostic Gauge — Essential Menus
PV480 Instrument Panel
PV480 Diagnostic Gauge — Using
PV480 Diagnostic Gauge — Main Menu
PV480 Diagnostic Gauge — Essential Menus
Main Menu Navigation
Engine Configuration Data
Accessing Stored Diagnostic Trouble Codes
Accessing Active Diagnostic Trouble Codes
Engine Shutdown Diagnostic Trouble Codes
Adjusting Backlighting
Adjusting Contrast
Selecting Units Of Measurement
Setup 1-Up Display
Setup 4-Up Display
Section 20 - HelmView Display Panel
Product Information
Display Features
Navigation
Setting up your display for the first time
Product Features
Reprogramming the Display
Group Numbers
Section 25 - Engine Operation
Normal Engine Operation
Marine Break-In Service
Auxiliary Gear Drive Limitations
Generator Set Power Units
Starting the Engine
Warming Engine
Idling Engine
Engaging And Disengaging Front PTO (If Equipped)
Cold Weather Operation
Stopping the Engine
Using a Booster Battery or Charger
Welding Near Electronic Control Units
Keep Electronic Control Unit Connectors Clean
Section 30 - Lubrication and Maintenance
Required Emission-Related Information
Observe Service Intervals
Use Correct Fuels, Lubricants, and Coolant
Lubrication and Maintenance Service Interval Chart—Propulsion
and Prime Power Units
Lubrication and Maintenance Service Interval Chart—Standby
Generator Sets
Section 35 - Lubrication & Maintenance — Daily
Daily Prestarting Checks
Section 40 - Lubrication & Maintenance — 250 Hours/6 Months
Changing Engine Oil and Replacing Oil Filter
Servicing Fire Extinguisher
Servicing Battery
Inspect and Replacing Zinc Plugs
Checking Belt Wear (Manual Tensioner)
Checking Engine Mounts
Section 45 - Lubrication & Maintenance — 500 Hours/12 Months
Replace Crankcase Vent Filter (If Equipped)
Checking Closed Crankcase Vent System (If Equipped)
Checking Air Intake System
Replacing Final Fuel Filter/Water Separator
Replacing Primary Fuel Filter Element
Checking Belt Tensioner Spring Tension and Belt Wear (Automatic
Tensioner)
Checking Cooling System
Replenishing Supplemental Coolant Additives (SCAs) Between Coolant
Changes
Testing Diesel Engine Coolant
Remove, Inspect and Clean Engine Heat Exchanger Core
Install Heat Exchanger Core
Remove, Inspect and Clean Engine
Aftercooler Core (6068SFM50)
Remove, Inspect and Clean Engine
Aftercooler Core (6068SFM75)
Install Aftercooler Core (6068SFM50)
Install Aftercooler Core (6068SFM75)
Pressure Testing Cooling System
Checking and Adjusting Engine Speeds
Checking Engine Electrical Ground Connections
Section 50 - Lubrication & Maintenance — 2000 Hours/24 Months
Checking and Adjusting Engine Valve Clearance (Except 6068SFM75
and 6068AFM75)
Checking and Adjusting Engine Valve Clearance (6068SFM75 and
6068AFM75)
Flushing And Refilling Cooling System
Inspecting Thermostats and Testing Opening Temperature
Checking Crankshaft Vibration Damper (6-Cylinder Engine Only)
Inspect and Repair Sea Water Pump (Except 6068SFM50/75 and 6068AFM75)
Inspect And Repair Sea Water Pump (6068SFM50/75 and 6068AFM75)
Section 55 - Service As Required
Additional Service Information
Do Not Modify Fuel System
Adding Coolant
Pre-Start Cleaning Guide
Replacing Dry Air Cleaner Element (Enclosed Element Installations)
Servicing Air Cleaner Filter Element
Replacing Air Cleaner Filter Element
Replacing Alternator Belt (With Automatic Tensioner)
Replacing Alternator Belt (With Manual Tensioner)
Check Front Power Take-Off (PTO)
Drain Water From Fuel Filter
Bleeding the Fuel System—Engines With Mechanical Fuel
Supply Pump
Bleeding Fuel System—Engines With Electric Fuel Supply
Pump
Bleeding Fuel System—6068SFM75/AFM75
Section 60 - Troubleshooting
General Troubleshooting Information
Precautions for Welding
Precautions For Welding On Vessels Equipped With Electronic
Engine Control Unit (ECU)
Transition Harness Wiring Diagram
Propulsion Engine Wiring Harness - Mechanically Controlled Engine
(4045DFM70)
Propulsion Engine Wiring Harness - Mechanically Controlled Engine
(4045DFM70)
Propulsion Engine Instrument Panel - Mechanically Controlled
Engine (4045DFM70)
Electronically Controlled Engine Electrical System Layout —
6068SFM50 Shown
Transition Harness Wiring Diagram
Wiring Diagram for John Deere Main Station (Wheel House) Instrument
Panel - Electronically Controlled Engine
Wiring Diagram for John Deere Main Station (Wheel House) Instrument
Panel - Electronically Controlled Engine - Cont'd
Wiring Diagram for John Deere Optional Fly Bridge Instrument
Panel - Electronically Controlled Engine
6068TFM75 and 6068SFM50 Marine Electronic Control System Wiring
Diagram
6068TFM75 and 6068SFM50 Marine Electronic Control System Wiring
Diagram - Cont'd
6068SFM75 / AFM75 Marine Electronic Control System Wiring Diagram
6068SFM75 / AFM75 Marine Electronic Control System Wiring Diagram
- Continued
6068SFM75 / AFM75 Marine Electronic Control System Wiring Diagram
- Continued
Engine Coolant and Sea Water Flow For Heat Exchanger Engines
(Except 6068SFM50/75 and 6068AFM75)
Engine Coolant and Sea Water Flow (6068SFM50)
Engine Troubleshooting
Electrical Troubleshooting
Blink Code Method for Retrieving Diagnostic Trouble Codes (Except
6068SFM75 and 6068AFM75)
Instrument Panel Method for Retrieving Diagnostic Trouble Codes
Listing Of Diagnostic Trouble Codes (DTC)
Intermittent Fault Diagnostics
Section 65 - Storage
Engine Storage Guidelines
Preparing Engine for Long-Term Storage
Removing Engine from Long-Term Storage
Section 70 - Specifications
General Engine Specifications—4.5 L Engines
General Engine Specifications—6.8 L Engines
Engine Power And Speed Specifications
Engine Crankcase Oil Fill Quantities
Unified Inch Bolt and Screw Torque Values
Metric Bolt and Screw Torque Values
Section 75 - Lubrication and Maintenance Records
Using Lubrication and Maintenance Records
Daily (Prestarting) Service
250 Hour-6 Month Service
500 Hour/12 Month Service
2000 Hour-24 Month Service
Service As Required
Section 80 - Warranty
John Deere Warranty in OEM Applications
Emissions Control System Certification Label
U.S. Marine Compression-Ignition Engine
Emission Control
Warranty Statement
European Union (EU) Declaration of Emissions Conformity
Section 85 - John Deere Service Literature Available
Technical Information