Service manual Caterpillar D6N TRACK-TYPE TRACTOR XL, LGP with C6.6 Engine | PER00001-UP

Air Conditioning and Heating R134a for All Caterpillar Machines
– Refrigerant Compressor
– System Capacities for Refrigerant (Off-Highway Trucks)
– General Information
– Identifying the Refrigerant
– Identifying the Air Conditioning System
– Identifying the Heating System
– Refrigerant Expansion Valve System
– Refrigerant Orifice Tube System
– Refrigerant Compressor
– Refrigerant Condenser
– Refrigerant Receiver-Dryer
– Refrigerant Compressor
– Refrigerant Expansion Valve
– In-line Refrigerant Dryer
– Refrigerant Orifice Tube Assembly
– Evaporator Coil
– Refrigerant Accumulator
– Refrigerant Compressor Protection System
– Temperature Control
– Pressure Switch (Refrigerant)
– Cab Pressurization and Filtration System
– Condensate Drainage System
– Refrigerant Compressor
– Service Intervals
– Glossary of Terms
– Required Tools
– Machine Preparation for Troubleshooting
– General Troubleshooting Information
– General Troubleshooting Information
– Visual Inspection (Troubleshooting)
– Air Conditioning System Troubleshooting
– Heating System Troubleshooting
– Automatic Temperature Control System (ECM Controlled)
– Refrigerant Compressor
– Troubleshooting Heating and Air Conditioning Control System
– Troubleshooting Heating and Air Conditioning Control System
– Automatic Temperature Control Panel Troubleshooting – 584
– Troubleshooting Condensate Drainage System
– Machine Preparation for Testing and Adjusting
– Air Conditioning Performance – Test
– Refrigerant Leakage – Test
– Manifold Gauge Set (Refrigerant) – Install
– Refrigerant Recovery
– Refrigerant System – Flush
– Refrigerant Compressor
– Refrigerant Oil – Test
– Refrigerant Compressor – Test
– Refrigerant System – Evacuate
– Refrigerant System – Charge
– Manifold Gauge Set (Refrigerant) – Remove
– Compressor Protection System – Test
– Electronic Heat Control – Test
– Heater Performance – Test
– Heating and Air Conditioning Service Publications
– General Information
– Refrigerant Compressor
– Machine Preparation for Disassembly and Assembly
– Air Conditioner Lines – Remove and Install
– Refrigerant Compressor – Remove and Install
– Refrigerant Accumulator – Remove and Install
– Refrigerant Expansion Valve – Remove and Install
– Refrigerant Receiver-Dryer – Remove and Install
– In-Line Refrigerant Dryer – Remove and Install
– Refrigerant Orifice Tube Assembly – Remove and Install
– Refrigerant Compressor
– System Capacities for Refrigerant (Motor Graders)
– System Capacities for Refrigerant (Off-Highway Trucks) –
– Refrigerant Compressor
D6N Track-Type Tractor Hydraulic System
– Accumulator
– Accumulator (Pilot) – Test and Charge
– Angle Cylinder (Bulldozer) – VPAT Only
– Bulldozer Blade
– Bulldozer Blade
– Bulldozer Blade
– Bulldozer Blade
– Bulldozer Brace – Arm Group – SU
– Bypass Valve (Hydraulic Oil Cooler)
– C-Frame
– Case Pressure (Steering Pump) – Check
– Control Valve (Bulldozer Angle)
– Control Valve (Bulldozer Lift)
– Control Valve (Bulldozer Tilt)
– Control Valve (Implement)
– Control Valve (Implement) – Valve Bank (Four)
– Control Valve (Implement) – Valve Bank (Three)
– Control Valve (Ripper)
– Cutting Edges and End Bits
– Cylinder Mounting
– Electrical Input Components
– Electrical Output Components
– Electronic Control Module (Machine)
– General Information (Hydraulic System)
– General Information (Steering)
– Graphic Color Codes
– Hydraulic Manifold (Bank Valve Inlet)
– Hydraulic Manifold (Bank Valve Outlet)
– Hydraulic Tank and Filter
– Hydraulic Tank and Filter
– Implement Operator Control – Calibrate
– Implement Solenoid Valve – Calibrate
– Joystick Control (AccuGrade, VPAT)
– Joystick Control (AccuGrade, VPAT)
– Joystick Control (Std Blade)
– Lift Cylinder (Bulldozer)
– Lift Cylinder (Bulldozer)
– Lift Cylinder (Ripper)
– Line Relief and Makeup Valve
– Lines (Diagnostic)
– Lines (Pump)
– Lines (Steering)
– Location of Electrical Components
– Location of Hydraulic Components
– Location of Steering Components
– Machine Preparation
– Modes of Operation (Steering Hydraulic System)
– Neutral Adjustment (Steering Pump) – Test and Adjust
– Oil Cooler (Steering)
– Oil Filter (Case Drain)
– Oil Filter (Case Drain)
– Oil Filter (Hydraulic)
– Operational Checks
– Pilot Oil Accumulator
– Piston Motor (Steering)
– Piston Motor (Steering)
– Piston Pump (Implement)
– Piston Pump (Implement)
– Piston Pump (Implement) – Test and Adjust
– Piston Pump (Steering)
– Piston Pump (Steering)
– Pressure Taps
– Proportional Priority Pressure Compensation System
– Proportional Priority Pressure Compensation System – Test
– Relief Valve (Charge) – Test and Adjust
– Relief Valve (Ripper)
– Relief Valve – Test and Adjust
– Relief Valve For Head and Rod End of Angle Cylinder
– Relief Valve For Rod End of Lift Cylinders (Bulldozer)
– Ripper
– Sprocket Speed (Final Drive) – Check
– Steering – Calibrate
– Steering and Transmission Hand Control
– Steering Charge Circuit Filter
– Steering Hydraulic Circuit – Test and Adjust
– Steering Radius – Check
– Tilt Cylinder (Bulldozer)
– Tilt Cylinder (Bulldozer)
D6N Track-Type Tractor Machine Systems
– Adjustable Seat
– Adjustable Seat
– Air Cleaner
– Air Conditioner Lines
– Battery and Wiring Group
– Battery and Wiring Group
– Bottom Guard
– Bulldozer Trunnion
– Case and Frame
– Circuit Breakers
– Drawbar
– Electrical Features
– Ether Starting Aid
– Fast Fill Fuel Adapter
– Fender
– Instrument Console
– Operator Console – Cover Group
– Operator Console – Cover Group
– Operator Console – Cover Group
– Ripper Mounting
– Sweep Group
– Sweep Group
– Winch Mounting
– Window Wiper and Wiper Motor
D6N Track-Type Tractor Monitoring System
– Charging System
– Connector Contact Description
– Connector Locations
– Data Link
– Diagnostic Capabilities
– Diagnostic Code List
– Diagnostic Operation
– Display Module
– Electrical Connector – Inspect
– General Information
– General Information
– Menu Navigation
– Menus (Instrument Cluster)
– MID 256, 247-14
– MID 256, 247-9
– MID 256, 271-3
– MID 256, 271-5
– MID 256, 271-6
– Module – Flash Program
– Module – Replace
– Monitoring System
– Output Components
– Self Test
– Service Tools
– System Schematic
– Using Caterpillar Electronic Technician to Determine
– Using the Operator Monitor to Determine Diagnostic Codes
– Warning Operation
– Wiring Harness (Open Circuit) – Test
– Wiring Harness (Short Circuit) – Test
D6N Track-Type Tractor Power Train
– Accumulator
– Accumulator – Test and Charge
– Bevel and Transfer Gears
– Bevel and Transfer Gears
– Brake – Calibrate
– Brake and Planetary
– Brake Control Valve
– Brake Control Valve
– Brake Pressure – Test
– Cab Mounting
– Differential Drive and Brake Group
– Differential Steering System
– Drive Shaft
– Electrical Input Components
– Electrical Output Components
– Equalizer Bar
– Equalizer Bar
– Equalizer Bar
– Final Drive
– Final Drive
– Final Drive
– Final Drive
– Gear Pump (Power Train)
– Gear Pump (Power Train)
– General Information
– Graphic Color Codes
– Hand Control Group
– Hand Control Group
– Hand Control Group
– Idlers (Track)
– Idlers (Track)
– Location of Electrical Components
– Location of Power Train Components
– Machine Preparation
– Magnetic Screen
– Modulating Valve (Transmission Hydraulic Control)
– Oil Filter (Power Train)
– Oil Filter (Power Train)
– Oil Filter (Power Train)
– Oil Filter (Power Train)
– Pivot Shaft
– Pivot Shaft
– Pivot Shaft
– Pressure Taps
– Recoil Group
– Recoil Group
– Relief Valve (Main)
– Relief Valve (Torque Converter Inlet)
– Relief Valve (Torque Converter Inlet) Pressure – Test and
– Relief Valve (Torque Converter Outlet)
– Relief Valve (Torque Converter Outlet) Pressure – Test and
– Relief Valve (Transmission) – Test and Adjust
– Service Brakes
– Speed Sensor – Adjust
– System Schematic
– System Schematic
– Torque Converter
– Torque Converter
– Torque Converter and Pump Drive Housing
– Torque Converter Hydraulic System
– Track Carrier Roller
– Track Carrier Roller
– Track Idler
– Track Roller
– Track Roller
– Track Roller Frame
– Track Roller Frames
– Track Roller Frames
– Tracks
– Tracks
– Tracks – Heavy Duty
– Tracks – System One
– Tracks – System One
– Transmission
– Transmission
– Transmission Clutch Pressure – Test
– Transmission Direction Control – Calibrate
– Transmission Fill – Calibrate
– Transmission Hydraulic Control
– Transmission Hydraulic Control
– Transmission Lubrication
– Transmission Lubrication Oil Pressure – Test
– Transmission Mounting
– Undercarriage
Disassembly and Assembly Caterpillar C6.6 Engines for Built Machines
– Flow Control Valve – Remove and Install
– Inlet Air Control – Remove – NRS Inlet Air Mixer
– Coolant Temperature Sensor – Remove and Install
– Engine Oil Pressure Sensor – Remove and Install
– Fuel Pressure Sensor – Remove and Install
– Fuel Temperature Sensor – Remove and Install
– Soot Antenna – Remove and Install
– Temperature Sensor (DPF) – Remove and Install
– Pressure Sensor (DPF) – Remove and Install – Clean Emissions
– Temperature Sensor (Cooled Exhaust Gas) – Remove and
– Pressure Sensor (Cooled Exhaust Gas) – Remove and Install –
– Boost Pressure Sensor – Remove and Install
– Inlet Air Control – Install – NRS Inlet Air Mixer
– Inlet Manifold Temperature Sensor – Remove and Install
– Glow Plugs – Remove and Install
– Alternator Belt – Remove and Install
– Idler Pulley – Remove and Install – Grooved Idler Pulley
– Idler Pulley – Remove and Install – Flat Idler Pulley
– Belt Tensioner – Remove and Install
– Fan – Remove and Install
– Fan Drive – Remove and Install
– Electronic Control Module – Remove and Install – Electronic
– Electronic Control Module – Remove and Install – Electronic
– Fuel Injection Pump – Remove
– Electronic Control Module – Remove and Install – Electronic
– ECM Mounting Bracket – Remove and Install
– Alternator – Remove
– Alternator – Install
– Alternator – Install
– Alternator – Install
– Electric Starting Motor – Remove and Install
– Air Compressor – Remove and Install – Twin Cylinder
– Air Compressor – Remove and Install – Single Cylinder
– Fuel Injection Pump – Install
– Fuel Injection Pump Gear – Remove
– Fuel Injection Pump Gear – Install
– Electronic Unit Injector – Remove
– Electronic Unit Injector – Install
– Wastegate Solenoid – Remove and Install
– Exhaust Back Pressure Valve – Remove and Install
– Fuel Filter Base – Remove and Install – Single Secondary Fuel
– Exhaust Gas Valve (NRS) – Remove and Install
– Flexible Exhaust Pipe – Remove and Install
– Exhaust Manifold and Turbocharger – Remove
– Exhaust Manifold and Turbocharger – Install
– Exhaust Elbow – Remove and Install
– Diesel Particulate Filter – Remove
– Diesel Particulate Filter – Install
– Inlet and Exhaust Valve Springs – Remove and Install
– Inlet and Exhaust Valves – Remove and Install
– Engine Oil Filter Base – Remove and Install
– Fuel Filter Base – Remove and Install – Twin Secondary Fuel
– Engine Oil Filter Base – Remove and Install – Engine Oil Filter
– Engine Oil Cooler – Remove – Engine Oil Cooler with a Low
– Engine Oil Cooler – Remove – Engine Oil Cooler with a High
– Engine Oil Cooler – Install – Engine Oil Cooler with a Low
– Engine Oil Cooler – Install – Engine Oil Cooler with a High
– Engine Oil Pump – Remove
– Engine Oil Pump – Install
– Water Pump – Remove
– Water Pump – Install
– Water Temperature Regulator – Remove and Install
– Water Separator and Fuel Filter (Primary) – Remove and
– Flywheel – Remove
– Flywheel – Remove – Equipped with Rear Power Take-Off
– Flywheel – Install
– Flywheel – Install – Equipped with Rear Power Take-Off
– Crankshaft Rear Seal – Remove
– Crankshaft Rear Seal – Install
– Flywheel Housing – Remove and Install – Standard Housing
– Flywheel Housing – Remove and Install – Wet Back End
– Vibration Damper and Pulley – Remove
– Vibration Damper and Pulley – Install
– Fuel Manifold (Rail) – Remove and Install
– Crankshaft Front Seal – Remove and Install
– Crankshaft Front Seal – Remove and Install – Crankshaft Front
– Front Cover – Remove and Install
– Front Cover – Remove and Install – Heavy Duty Front Cover
– Gear Group (Front) – Remove and Install
– Gear Group (Front) – Remove and Install
– Gear Group (Front) – Remove and Install – Heavy Duty Gear
– Gear Group (Front) – Remove and Install – Heavy Duty Gear
– Idler Gear – Remove
– Idler Gear – Install
– Fuel Injection Lines – Remove
– Housing (Front) – Remove
– Housing (Front) – Remove – Heavy Duty Housing (Front)
– Housing (Front) – Install – Heavy Duty Housing (Front)
– Housing (Front) – Install
– Accessory Drive – Remove and Install – Accessory Drive SAE
– Accessory Drive – Remove and Install – Accessory Drive SAE
– Crankcase Breather – Remove
– Crankcase Breather – Install
– Valve Mechanism Cover – Remove and Install
– Rocker Shaft and Pushrod – Remove
– Fuel Injection Lines – Install
– Rocker Shaft – Disassemble
– Rocker Shaft – Assemble
– Rocker Shaft and Pushrod – Install
– Cylinder Head – Remove
– Cylinder Head – Install
– Lifter Group – Remove and Install – Hydraulic Lifter Group
– Camshaft – Remove and Install
– Camshaft Gear – Remove and Install
– Camshaft Gear – Remove and Install
– Camshaft Bearings – Remove and Install
– Exhaust Cooler (NRS) – Remove
– Engine Oil Pan – Remove – Aluminum Oil Pan
– Engine Oil Pan – Install – Aluminum Oil Pan
– Engine Oil Pan Plate – Remove and Install – Aluminum Oil Pan
– Piston Cooling Jets – Remove and Install
– Pistons and Connecting Rods – Remove
– Pistons and Connecting Rods – Disassemble
– Pistons and Connecting Rods – Assemble
– Pistons and Connecting Rods – Install
– Connecting Rod Bearings – Remove – Connecting Rods in
– Connecting Rod Bearings – Install – Connecting Rods in
– Exhaust Cooler (NRS) – Install
– Crankshaft Main Bearings – Remove and Install – Crankshaft
– Crankshaft – Remove
– Crankshaft – Install
– Crankshaft Timing Ring – Remove and Install
– Crankshaft Gear – Remove and Install
– Bearing Clearance – Check
– Refrigerant Compressor – Remove and Install
– Atmospheric Pressure Sensor – Remove and Install
– Camshaft Position Sensor – Remove and Install
– Crankshaft Position Sensor – Remove and Install
– Fuel Priming Pump – Remove and Install – Electric Fuel Lift
Disassembly and Assembly D6N Track-Type Tractor Engine Supplement
– Air Cleaner – Remove and Install
– Alternator – Remove and Install
– Belt Tensioner – Remove and Install
– Belt Tensioner – Remove and Install
– Cooling System Package (Radiator, Aftercooler, Oil Cooler) –
– Crankshaft Vibration Damper – Remove and Install
– Diesel Particulate Filter – Remove and Install
– Electric Starting Motor – Remove and Install
– Electric Starting Motor – Remove and Install
– Engine – Remove and Install
– Engine Front Support – Remove and Install
– Engine Oil Filter and Base – Remove and Install
– Engine Side Guards – Remove and Install
– Fan – Remove and Install
– Fan – Remove and Install
– Fan Drive – Assemble
– Fan Drive – Disassemble
– Fan Drive – Remove and Install
– Fan Drive – Remove and Install
– Fan Guard – Remove and Install
– Flexible Exhaust Pipe – Remove and Install
– Flexible Exhaust Pipe – Remove and Install
– Fuel Pressure Regulator – Remove and Install
– Hood – Remove and Install
– Hydraulic Oil Cooler – Remove and Install
– Primary Fuel Filter, Water Separator and Base – Remove and
– Refrigerant Compressor – Remove and Install
– Refrigerant Compressor – Remove and Install
– Secondary Fuel Filter and Base – Remove and Install
– Soot Antenna – Remove and Install
– Soot Sensor – Remove and Install
– Temperature Sensor (DPF) – Remove and Install
– Temperature Sensor (DPF) – Remove and Install
– Turbocharger – Remove and Install
– Water Pump (Engine) – Remove and Install
– Water Temperature Regulator – Remove and Install
– Water Temperature Regulator – Remove and Install
Disassembly and Assembly D6N Track-Type Tractor Machine Systems
– Accumulator (Implement) – Remove and Install
– Air Conditioner Dryer – Remove and Install
– Bottom Guard – Install
– Bottom Guard – Remove
– Bulldozer (VPAT) – Remove and Install
– Bulldozer Angle Cylinder (VPAT) – Remove and Install
– Bulldozer C-Frame – Remove and Install
– Bulldozer Lift Cylinder (VPAT) – Remove and Install
– Bulldozer Tilt Cylinder (VPAT) – Remove and Install
– Cab – Remove and Install
– Control (Joystick) – Remove and Install
– Decelerator and Brake Control – Remove and Install
– Fuel Tank – Remove and Install
– Hydraulic Control Valve – Assemble
– Hydraulic Control Valve – Disassemble
– Hydraulic Control Valve – Remove and Install
– Hydraulic System Pressure – Release
– Hydraulic Tank – Remove and Install
– Piston Pump (Implement) – Assemble
– Piston Pump (Implement) – Disassemble
– Piston Pump (Implement) – Remove and Install
– Piston Pump (Steering) – Assemble
– Piston Pump (Steering) – Disassemble
– Piston Pump (Steering) – Remove and Install
– Refrigerant Accumulator – Remove and Install
– Refrigerant Condenser – Remove and Install
– Refrigerant Condenser Fan and Fan Motor – Remove and
– Refrigerant Evaporator Core and Heater Core – Remove and
– Rollover Protective Structure (ROPS) – Remove and Install
– Seat – Remove and Install
– Steering and Transmission Control – Remove and Install
– Steering Motor – Assemble
– Steering Motor – Disassemble
– Steering Motor – Install
– Steering Motor – Remove
– Steering Sensor – Assemble
– Steering Sensor – Disassemble
Disassembly and Assembly D6N Track-Type Tractor Power Train
– Axle – Remove and Install
– Bevel and Transfer Gears – Assemble
– Bevel and Transfer Gears – Assemble
– Bevel and Transfer Gears – Disassemble
– Bevel and Transfer Gears – Disassemble
– Brake Control Valve – Assemble
– Brake Control Valve – Disassemble
– Brake Control Valve – Remove and Install
– Drawbar – Remove and Install
– Duo-Cone Conventional Seals – Install
– Equalizer Bar – Remove and Install
– Final Drive – Assemble
– Final Drive – Disassemble
– Final Drive – Remove and Install
– Final Drive Planetary Carrier (In Chassis) – Remove and Install
– Final Drive, Steering Differential, and Brake (Left Side) –
– Final Drive, Steering Planetary, and Brake (Right Side) –
– Front Track Roller Frame – Remove and Install
– Idler – Remove and Install
– Main Drive Shaft – Remove and Install
– Oil Filter and Base (Power Train) – Remove and Install
– Pivot Shaft – Remove and Install
– Power Train Oil Pump – Assemble
– Power Train Oil Pump – Disassemble
– Power Train Oil Pump – Remove and Install
– Recoil Spring – Remove and Install
– Sprocket Segment – Remove and Install
– Steering Differential and Brake – Assemble
– Steering Differential and Brake – Disassemble
– Steering Planetary and Brake – Assemble
– Steering Planetary and Brake – Disassemble
– Torque Converter – Assemble
– Torque Converter – Disassemble
– Torque Converter – Remove and Install
– Torque Converter Outlet Relief Valve – Assemble
– Torque Converter Outlet Relief Valve – Disassemble
– Torque Converter Outlet Relief Valve – Remove and Install
– Track – Connect
– Track – Connect – Conventional
– Track – Separate
– Track – Separate – Conventional
– Track Adjuster – Remove and Install
– Track Master Link (Clamp) – Remove and Install – System One
– Track Roller – Remove and Install
– Track Roller Frame – Remove and Install
– Transmission – Assemble
– Transmission – Disassemble
– Transmission and Bevel Gears – Remove and Install
– Transmission and Bevel Gears – Separate and Connect
– Transmission Hydraulic Control Valve – Assemble
– Transmission Hydraulic Control Valve – Disassemble
– Transmission Hydraulic Control Valve – Remove and Install
Machine Security System (MSS3i) Integrated
– System Overview
– System Components
– Data Link
– General Information
– Troubleshooting
– Key – Program
– Scheduled Access – Program – Security System Bypass
– Time – Set
– Factory Password – Obtain
– Configuration
– Machine Security System – Uninstall
– Normal Operation
– Glossary of Terms
– System Schematic
– Operation of Status Indicator
– Key Information
– Scheduled Access – “Security System Bypass Times”
– Diagnostic Operation
– Protected Functions
– Service Operation Using Service Tool
– Electronic Control Module (ECM)
– General Information
Schematic Caterpillar D6N Track-Type Tractor Electrical System
– Features
– Cover Page
– Information
– Component Location
– Vol 1 – Cab and Chassis
– Vol 2 – Engine
– Connector Location
– Vol 1 – Cab and Chassis
– Vol 2 – Engine
– Schematics
– Function Isolation Tools
– Grids On/Off
– All Circuits Off
– All Circuits On
– Vol 1 – Cab and Chassis
– Unspecified Circuit
– Black (Ground)
– 032 (Red) (Battery Power)
– 640 (Blue) (Key Power)
– 305 (Lt Blue) (Converter 12v Out)
– 021 (Orange) (Starting)
– 190 (Dk Pink) (Start Aid)
– 258 (Dk Purple) (Transmission Control Circuit)
– 430 (Dk Gray) (Machine Security Control Circuit)
– 509 (Lt Pink) (Engine Master)
– 613 (Dk Yellow) (Heat/AC)
– 4665 (Tan) (Turn/Wiper/Washer)
– CON 346 (CAT D.L.)
– CON 509 (J1939/1587 D.L.)
– CON 032 (RS232/485 D.L.)
– SUB 141 (Lt Orange) (Implement Control Circuit)
– CON 522 (CAN “B” D.L.)
– CON 305 (CAN “D” D.L.)
– Vol 2 – Engine
– Unspecified Circuit
– Black (Ground)
– 032 (Red) (Battery Power)
– 640 (Blue) (Key Power)
– 021 (Orange) (Starting)
– 190 (Dk Pink) (Start Aid)
– 258 (Dk Purple) (Transmission Control Circuit)
– 509 (Lt Pink) (Engine Master)
– 613 (Dk Yellow) (Heat/AC)
– CON 346 (CAT D.L.)
– CON 509 (J1939/1587 D.L.)
– SUB 141 (Lt Orange) (Implement Control Circuit)
– CON 141 (CAN “C” D.L.)
– Machine Views
– Vol 1 – Cab and Chassis
– Cab Console (RH) Wiring
– Cab Dash View
– Cab Headliner View
– Brake Control Valve Wiring
– Control Pod (LH) Wiring
– Fender (LH) Wiring
– Front Grade Control Wiring
– HVAC and Precleaner Wiring
– Implement Wiring
– Transmission Wiring
– Vol 2 – Engine
– Engine Top View
– Front Engine View (Left Side)
– Front Engine View (Right Side)
– Radiator Wiring (Left Side)
– Tier 4 Interim System (Left Side)
Schematic Caterpillar D6N Track-Type Tractor Hydraulic System
– Features
– Cover Page
– Information
– Component Location
– Tap Location
– Fluid Power Symbols
– Electrical Symbols
– Schematic
– Machine Views
– Front Frame
– Implement Control Valve
– Under Cab
– Remote Tap Panel
– Ripper
Schematic Caterpillar D6N and D6N LGP OEM Track-Type Tractor Power Train System
– Features
– Cover Page
– Information
– Component Location
– Tap Location
– Fluid Power Symbols
– Electrical Symbols
– Schematic
– Machine Views
– Power Train
– Tap Locations
Specifications C6.6 Engines For Caterpillar Built Machines
– Fuel Injection Lines
– Rocker Shaft
– Valve Mechanism Cover
– Cylinder Head Valves
– Cylinder Head
– Turbocharger
– Exhaust Gas Valve (NRS)
– Exhaust Sensor and Lines (NRS)
– Exhaust Cooler (NRS)
– Exhaust Manifold
– Flexible Exhaust Pipe
– Fuel Injection Pump
– Diesel Particulate Filter
– Camshaft
– Camshaft Bearings
– Engine Oil Filter Base
– Engine Oil Cooler
– Engine Oil Pump
– Engine Oil Pressure
– Engine Oil Pan
– Crankcase Breather
– Water Temperature Regulator and Housing
– Fuel Injection Nozzles
– Water Pump
– Cylinder Block
– Crankshaft
– Crankshaft Seals
– Vibration Damper and Pulley
– Connecting Rod Bearing Journal
– Main Bearing Journal
– Connecting Rod
– Piston and Rings
– Piston Cooling Jet
– Fuel Transfer Pump – Electric Transfer Pump
– Accessory Drive
– Accessory Drive – SAE “B”
– Front Housing and Covers
– Gear Group (Front)
– Flywheel
– Flywheel Housing – Flywheel Housing that is Equipped with
– Flywheel Housing
– Belt Tensioner
– Refrigerant Compressor
– Fan Drive
– Fuel Filter Base – Primary Fuel Filter Base
– Engine Lifting Bracket
– Alternator
– Alternator
– Starter Motor
– Coolant Temperature Sensor
– Engine Oil Pressure Sensor
– Boost Pressure Sensor
– Atmospheric Pressure Sensor
– Inlet Manifold Temperature Sensor
– Temperature Sensor (DPF Inlet)
– Fuel Filter Base – Single Secondary Fuel Filter Base
– Pressure Sensor (NOx Reduction System)
– Temperature Sensor (NOx Reduction System)
– Speed/Timing Sensor
– Electronic Control Module
– Glow Plugs
– Air Compressor – Twin Cylinder Compressor
– Air Compressor – Single Cylinder
– Fuel Filter Base – Twin Secondary Fuel Filter Base
– Fuel Manifold (Rail)
– Lifter Group
– Engine Design
Systems Operation Starting and Charging Systems
– Alternator Breaker Test Description
– Alternator Test Description
– Analyzer Test Description
– Basic Operation
– Batteries Test Description
– Coolant Switch Test Description
– General Information
– Key Breaker Test Description
– Key Start Switch Test Description
– Main Relay and/or Breaker Test Description
– Reference Information
– Specifications
– Start Aid Switch/Solenoid Test Description
– Start Relay (Starter One) Test Description
– Start Relay (Starter Two) Test Description
– Starter Ground Circuit Test Description
– Starter Solenoid (Starter One) Test Description
– Starter Solenoid (Starter Two) Test Description
– Starter Solenoid Power Circuit (Starter One) Test Description
– Starter Solenoid Power Circuit (Starter Two) Test Description
– Test Considerations
– Test Setup A, Hookup
– Test Step B, Crank
– Test Step C, Start Aid
– Test Step D, High Idle
– Troubleshooting
Systems Operation and Testing and Adjusting C6.6 Engines for Caterpillar Built Machines
– Basic Engine
– Power Sources
– Glossary of Electronic Control Terms
– Fuel System – Inspect
– Air in Fuel – Test
– Finding Top Center Position for No. 1 Piston
– Fuel Injection Timing – Check
– Fuel Quality – Test
– Fuel System – Prime
– Gear Group (Front) – Time
– Air Inlet and Exhaust System – Inspect
– Air Inlet and Exhaust System
– Turbocharger – Inspect – Single Turbocharger
– Exhaust Cooler (NRS) – Test
– Compression – Test
– Engine Valve Lash – Inspect
– Valve Depth – Inspect
– Valve Guide – Inspect
– Engine Oil Pressure – Test
– Engine Oil Pump – Inspect
– Excessive Bearing Wear – Inspect
– Excessive Engine Oil Consumption – Inspect
– Clean Emissions Module
– Increased Engine Oil Temperature – Inspect
– Cooling System – Check
– Cooling System – Inspect
– Cooling System – Test
– Engine Oil Cooler – Inspect
– Water Temperature Regulator – Test
– Water Pump – Inspect
– Position the Valve Mechanism Before Maintenance Procedures
– Piston Ring Groove – Inspect
– Connecting Rod – Inspect
– Cooling System
– Cylinder Block – Inspect
– Cylinder Head – Inspect
– Piston Height – Inspect
– Flywheel – Inspect
– Flywheel Housing – Inspect
– Gear Group – Inspect
– Vibration Damper – Check
– Alternator – Test
– Battery – Test
– Charging System – Test
– Lubrication System
– V-Belt – Test
– Electric Starting System – Test
– Electrical System
– Cleanliness of Fuel System Components
– Fuel Injection
– Electronic Control System
– Introduction
Troubleshooting C4.4 and C6.6 Engines
– Welding Precaution
– Diagnostic Trouble Codes
– Electrical Connectors – Inspect
– Cooling Fan – Calibrate – If Applicable
– Injector Code – Calibrate
– Event Codes
– Acceleration Is Poor or Throttle Response Is Poor
– Alternator Problem
– Battery Problem
– Belt Tensioner Noise
– Coolant Contains Oil
– Coolant Level Is Low
– Coolant Temperature Is High
– Coolant Temperature Is Low
– Electronic Service Tools
– Cooling Fan Is Always ON
– Crankcase Breather Ejects Oil
– Crankcase Fumes Disposal Tube Has Oil Draining
– Cylinder Is Noisy
– Diesel Particulate Filter Collects Excessive Soot
– Diesel Particulate Filter Temperature Is Low
– Engine Cranks but Does Not Start
– Engine Does Not Crank
– Engine Has Early Wear
– Engine Has Mechanical Noise (Knock)
– Service Information Report
– Engine Misfires, Runs Rough or Is Unstable
– Engine Overcrank Occurrence
– Engine Overspeeds
– Engine Shutdown Occurrence
– Engine Shutdown Occurs Intermittently
– Engine Stalls at Low RPM
– Engine Top Speed Is Not Obtained
– Engine Vibration Is Excessive
– Exhaust Has Excessive Black Smoke
– Exhaust Has Excessive White Smoke
– System Overview
– Exhaust System Contains Coolant
– Exhaust System Contains Oil
– Fuel Consumption Is Excessive
– Fuel Contains Water
– Fuel Rail Pressure Problem
– Fuel Temperature Is High
– Inlet Air Is Restricted
– Intake Manifold Air Pressure Is High
– Intake Manifold Air Pressure Is Low
– Intake Manifold Air Temperature Is High
– Component Location
– NRS Exhaust Gas Temperature Is High
– NRS Mass Flow Rate Problem
– Oil Consumption Is Excessive
– Oil Contains Coolant
– Oil Contains Fuel
– Oil Level Is Low
– Oil Pressure Is Low
– Power Is Intermittently Low or Power Cutout Is Intermittent
– Valve Lash Is Excessive
– Aftertreatment Identification Module – Test
– Engine Monitoring System
– CAN Data Link – Test
– Coolant Level – Test
– Cooling Fan Control – Test
– Cooling Fan Reversing – Test
– Cooling Fan Speed – Test
– Data Link – Test
– Data Link Configuration Status – Test
– Electrical Power Supply – Test
– Ether Starting Aid – Test
– Fuel Transfer Pump – Test
– Diagnostic Capabilities
– Glow Plug Starting Aid – Test
– Idle Validation – Test
– Indicator Lamp – Test
– Injector Data Incorrect – Test
– Injector Solenoid – Test
– Mode Selection – Test
– Motorized Valve – Test
– Power Take-Off – Test
– Relay – Test – Start Relay
– Sensor Calibration Required – Test
– Electrical Connectors
– Sensor Signal (Analog, Active) – Test
– Sensor Signal (Analog, Passive) – Test
– Sensor Supply – Test
– Shutdown (Ground Level) – Test
– Solenoid Valve – Test
– Soot Sensor – Test
– Speed Control (Analog) – Test
– Speed Control (PWM) – Test
– Speed/Timing – Test
– Switch Circuits – Test – Multiposition Throttle Switch
– Configuration Parameters
– Switch Circuits – Test – Air Filter Restriction Switch
– Valve Position – Test
– Water in Fuel – Test
– Customer Passwords
– Factory Passwords
– ECM Will Not Accept Factory Passwords
– Electronic Service Tool Does Not Communicate
– Test ECM Mode
– ECM Software – Install
– ECM – Replace
– General Information
Troubleshooting D6N Track-Type Tractor
– Backup Alarm Does Not Function
– Brake Does Not Engage
– Brake Does Not Release
– Connector Contact Description
– Connector Locations
– Diagnostic Capabilities
– Diagnostic Code List
– Electrical Connector – Inspect
– Electronic Control Module (ECM) – Configure
– Electronic Control Module (ECM) – Flash Program
– Electronic Control Module (ECM) – Replace
– Emerging Symptom Information
– Event Code List
– Fuel Tank Overfills (Fast Fill Fuel)
– Fuel Tank Underfills (Fast Fill Fuel)
– Fueling Nozzle Leaks (Fast Fill Fuel)
– Fueling Nozzle Shuts Off Prematurely (Fast Fill Fuel)
– General Information
– Hydraulic Cylinder Movement Is Harsh
– Hydraulic System
– Hydraulic System Has Unusual Noise
– Hydraulic System Oil Contains Air
– Hydraulic System Oil Level Is Low
– Hydraulic System Oil Temperature Is High
– Implement Cycle Time Is Fast
– Implement Cycle Time Is Slow
– Implement System – Troubleshooting for the Implement
– Machine Does Not Move
– Machine Preparation for Troubleshooting
– MID 039 – CID 0041 – FMI 03
– MID 039 – CID 0041 – FMI 04
– MID 039 – CID 0070 – FMI 03
– MID 039 – CID 0070 – FMI 04
– MID 039 – CID 0096 – FMI 03
– MID 039 – CID 0096 – FMI 04
– MID 039 – CID 0141 – FMI 02
– MID 039 – CID 0168 – FMI 02
– MID 039 – CID 0168 – FMI 03
– MID 039 – CID 0168 – FMI 04
– MID 039 – CID 0177 – FMI 03
– MID 039 – CID 0177 – FMI 04
– MID 039 – CID 0247 – FMI 09
– MID 039 – CID 0262 – FMI 03
– MID 039 – CID 0262 – FMI 04
– MID 039 – CID 0358 – FMI 03
– MID 039 – CID 0358 – FMI 05
– MID 039 – CID 0358 – FMI 06
– MID 039 – CID 0368 – FMI 02
– MID 039 – CID 0444 – FMI 03
– MID 039 – CID 0444 – FMI 05
– MID 039 – CID 0444 – FMI 06
– MID 039 – CID 0468 – FMI 03
– MID 039 – CID 0468 – FMI 04
– MID 039 – CID 0468 – FMI 08
– MID 039 – CID 0468 – FMI 13
– MID 039 – CID 0490 – FMI 03
– MID 039 – CID 0490 – FMI 04
– MID 039 – CID 0585 – FMI 02
– MID 039 – CID 0585 – FMI 08
– MID 039 – CID 0588 – FMI 02
– MID 039 – CID 0588 – FMI 09
– MID 039 – CID 0588 – FMI 14
– MID 039 – CID 0590 – FMI 02
– MID 039 – CID 0590 – FMI 09
– MID 039 – CID 0590 – FMI 14
– MID 039 – CID 0600 – FMI 03
– MID 039 – CID 0600 – FMI 04
– MID 039 – CID 0672 – FMI 02
– MID 039 – CID 0672 – FMI 08
– MID 039 – CID 0673 – FMI 02
– MID 039 – CID 0673 – FMI 08
– MID 039 – CID 0681 – FMI 03
– MID 039 – CID 0681 – FMI 04
– MID 039 – CID 0681 – FMI 05
– MID 039 – CID 0681 – FMI 06
– MID 039 – CID 0722 – FMI 03
– MID 039 – CID 0722 – FMI 04
– MID 039 – CID 0722 – FMI 05
– MID 039 – CID 0722 – FMI 06
– MID 039 – CID 0726 – FMI 03
– MID 039 – CID 0726 – FMI 05
– MID 039 – CID 0726 – FMI 06
– MID 039 – CID 0727 – FMI 03
– MID 039 – CID 0727 – FMI 05
– MID 039 – CID 0727 – FMI 06
– MID 039 – CID 0779 – FMI 03
– MID 039 – CID 0779 – FMI 04
– MID 039 – CID 0826 – FMI 03
– MID 039 – CID 0826 – FMI 04
– MID 039 – CID 1078 – FMI 03
– MID 039 – CID 1078 – FMI 04
– MID 039 – CID 1078 – FMI 08
– MID 039 – CID 1078 – FMI 13
– MID 039 – CID 1079 – FMI 03
– MID 039 – CID 1079 – FMI 04
– MID 039 – CID 1079 – FMI 08
– MID 039 – CID 1079 – FMI 13
– MID 039 – CID 1197 – FMI 03
– MID 039 – CID 1197 – FMI 05
– MID 039 – CID 1197 – FMI 06
– MID 039 – CID 1197 – FMI 13
– MID 039 – CID 1198 – FMI 03
– MID 039 – CID 1198 – FMI 05
– MID 039 – CID 1198 – FMI 06
– MID 039 – CID 1198 – FMI 13
– MID 039 – CID 1251 – FMI 04
– MID 039 – CID 1326 – FMI 02
– MID 039 – CID 1401 – FMI 03
– MID 039 – CID 1401 – FMI 05
– MID 039 – CID 1401 – FMI 06
– MID 039 – CID 1401 – FMI 13
– MID 039 – CID 1402 – FMI 03
– MID 039 – CID 1402 – FMI 05
– MID 039 – CID 1402 – FMI 06
– MID 039 – CID 1402 – FMI 13
– MID 039 – CID 1403 – FMI 03
– MID 039 – CID 1403 – FMI 05
– MID 039 – CID 1403 – FMI 06
– MID 039 – CID 1403 – FMI 13
– MID 039 – CID 1404 – FMI 03
– MID 039 – CID 1404 – FMI 05
– MID 039 – CID 1404 – FMI 06
– MID 039 – CID 1404 – FMI 13
– MID 039 – CID 1405 – FMI 03
– MID 039 – CID 1405 – FMI 05
– MID 039 – CID 1405 – FMI 06
– MID 039 – CID 1405 – FMI 13
– MID 039 – CID 1469 – FMI 08
– MID 039 – CID 1470 – FMI 08
– MID 039 – CID 1471 – FMI 03
– MID 039 – CID 1471 – FMI 04
– MID 039 – CID 1471 – FMI 08
– MID 039 – CID 1471 – FMI 12
– MID 039 – CID 1471 – FMI 13
– MID 039 – CID 1473 – FMI 03
– MID 039 – CID 1473 – FMI 04
– MID 039 – CID 1473 – FMI 08
– MID 039 – CID 1473 – FMI 12
– MID 039 – CID 1473 – FMI 13
– MID 039 – CID 1482 – FMI 03
– MID 039 – CID 1482 – FMI 04
– MID 039 – CID 1558 – FMI 09
– MID 039 – CID 1693 – FMI 03
– MID 039 – CID 1693 – FMI 04
– MID 039 – CID 1693 – FMI 08
– MID 039 – CID 1870 – FMI 03
– MID 039 – CID 1870 – FMI 04
– MID 039 – CID 1870 – FMI 08
– MID 039 – CID 1870 – FMI 13
– MID 039 – CID 1884 – FMI 03
– MID 039 – CID 1884 – FMI 05
– MID 039 – CID 1885 – FMI 03
– MID 039 – CID 1885 – FMI 05
– MID 039 – CID 1933 – FMI 03
– MID 039 – CID 1933 – FMI 05
– MID 039 – CID 1933 – FMI 06
– MID 039 – CID 1933 – FMI 13
– MID 039 – CID 1934 – FMI 03
– MID 039 – CID 1934 – FMI 05
– MID 039 – CID 1934 – FMI 06
– MID 039 – CID 1934 – FMI 13
– MID 039 – CID 1960 – FMI 09
– MID 039 – CID 2113 – FMI 02
– MID 039 – CID 2113 – FMI 03
– MID 039 – CID 2113 – FMI 04
– MID 039 – CID 2204 – FMI 03
– MID 039 – CID 2204 – FMI 04
– MID 039 – CID 2204 – FMI 08
– MID 039 – CID 2204 – FMI 13
– MID 039 – CID 2211 – FMI 03
– MID 039 – CID 2211 – FMI 04
– MID 039 – CID 2211 – FMI 05
– MID 039 – CID 2211 – FMI 06
– MID 039 – CID 2211 – FMI 13
– MID 039 – CID 2212 – FMI 03
– MID 039 – CID 2212 – FMI 04
– MID 039 – CID 2212 – FMI 05
– MID 039 – CID 2212 – FMI 06
– MID 039 – CID 2212 – FMI 13
– MID 039 – CID 2240 – FMI 03
– MID 039 – CID 2240 – FMI 05
– MID 039 – CID 2240 – FMI 06
– MID 039 – CID 2240 – FMI 13
– MID 039 – CID 2241 – FMI 03
– MID 039 – CID 2241 – FMI 05
– MID 039 – CID 2241 – FMI 06
– MID 039 – CID 2241 – FMI 13
– MID 039 – CID 2268 – FMI 03
– MID 039 – CID 2268 – FMI 05
– MID 039 – CID 2357 – FMI 03
– MID 039 – CID 2357 – FMI 04
– MID 039 – CID 2440 – FMI 03
– MID 039 – CID 2440 – FMI 05
– MID 039 – CID 2440 – FMI 06
– MID 039 – CID 2500 – FMI 08
– MID 039 – CID 2596 – FMI 03
– MID 039 – CID 2596 – FMI 05
– MID 039 – CID 2596 – FMI 06
– MID 039 – CID 2596 – FMI 13
– MID 039 – CID 2659 – FMI 02
– MID 039 – CID 2661 – FMI 03
– MID 039 – CID 2661 – FMI 04
– MID 039 – CID 2663 – FMI 03
– MID 039 – CID 2663 – FMI 04
– MID 039 – CID 2671 – FMI 03
– MID 039 – CID 2671 – FMI 05
– MID 039 – CID 2671 – FMI 06
– MID 039 – CID 2679 – FMI 03
– MID 039 – CID 2679 – FMI 04
– MID 039 – CID 2705 – FMI 02
– MID 039 – CID 2705 – FMI 03
– MID 039 – CID 2705 – FMI 04
– MID 039 – CID 2755 – FMI 03
– MID 039 – CID 2755 – FMI 04
– MID 039 – CID 2954 – FMI 14
– MID 039 – CID 2993 – FMI 03
– MID 039 – CID 2993 – FMI 04
– MID 039 – CID 2993 – FMI 08
– MID 039 – CID 2994 – FMI 03
– MID 039 – CID 2994 – FMI 04
– MID 039 – CID 2994 – FMI 08
– MID 039 – CID 3187 – FMI 03
– MID 039 – CID 3187 – FMI 04
– MID 039 – CID 3188 – FMI 03
– MID 039 – CID 3188 – FMI 04
– MID 039 – CID 3195 – FMI 03
– MID 039 – CID 3195 – FMI 04
– MID 039 – CID 3196 – FMI 03
– MID 039 – CID 3196 – FMI 04
– MID 039 – CID 3527 – FMI 12
– MID 039 – CID 3642 – FMI 02
– MID 039 – CID 3747 – FMI 03
– MID 039 – CID 3747 – FMI 05
– MID 039 – CID 3747 – FMI 06
– MID 039 – CID 3753 – FMI 03
– MID 039 – CID 3753 – FMI 05
– MID 039 – CID 3753 – FMI 06
– MID 039 – CID 3784 – FMI 03
– MID 039 – CID 3784 – FMI 04
– Operational Checks (Brake System)
– Operational Checks (Hydraulic System)
– Operational Checks (Power Train)
– Power Train Oil Contains Air
– Power Train Oil Temperature Is High
– Power Train System Pressure Is Low
– Ripper Does Not Function
– Service Tools
– Steering Does Not Function
– Steering Does Not Function in One Direction
– Steering Hesitates
– Steering Is Harsh
– Steering Is Unstable
– Steering Turn Force Is Low
– Steering Turn Radius Is Large
– Symptom Troubleshooting
– System Schematic
– Transmission Does Not Shift Into All Gears
– Using Caterpillar Electronic Technician to Determine
– Using the Operator Monitor to Determine Diagnostic Codes
– Visual Inspection
– Wiring Harness (Open Circuit) – Test
– Wiring Harness (Short Circuit) – Test