Service manual Caterpillar D6N XL, LGP TRACK-TYPE TRACTOR with C7.1 Engine | NJN00001-UP

Air Conditioning and Heating R134a for All Cat Machines
– General Information
– Refrigerant Orifice Tube System
– Refrigerant Compressor
– Refrigerant Compressor
– Refrigerant Compressor
– Refrigerant Condenser
– Refrigerant Condenser
– Refrigerant Receiver-Dryer
– Refrigerant Receiver-Dryer
– Refrigerant Expansion Valve
– In-line Refrigerant Dryer
– Identifying the Refrigerant
– In-line Refrigerant Dryer
– Refrigerant Orifice Tube Assembly
– Refrigerant Orifice Tube Assembly
– Evaporator Coil
– Refrigerant Accumulator
– Refrigerant Accumulator
– Refrigerant Accumulator
– Refrigerant Compressor Protection System
– Temperature Control
– Temperature Control
– Identifying the Refrigerant
– Pressure Switch (Refrigerant)
– Pressure Switch (Refrigerant)
– Cab Pressurization and Filtration System
– Cab Pressurization and Filtration System
– Cab Pressurization and Filtration System
– Condensate Drainage System
– Condensate Drainage System
– Service Intervals
– Service Intervals
– Glossary of Terms
– Identifying the Air Conditioning System
– General Troubleshooting Information
– General Troubleshooting Information
– Machine Preparation for Testing and Adjusting
– Machine Preparation for Testing and Adjusting
– Air Conditioning Performance – Test
– Refrigerant Leakage – Test
– Manifold Gauge Set (Refrigerant) – Install
– Manifold Gauge Set (Refrigerant) – Install
– Refrigerant Recovery
– Refrigerant Recovery
– Identifying the Air Conditioning System
– Refrigerant System – Flush
– Refrigerant Oil – Test
– Refrigerant Compressor – Test
– Refrigerant Compressor – Test
– Refrigerant Compressor – Test
– Refrigerant System – Evacuate
– Refrigerant System – Evacuate
– Refrigerant System – Charge
– Refrigerant System – Charge
– Manifold Gauge Set (Refrigerant) – Remove
– Identifying the Heating System
– Manifold Gauge Set (Refrigerant) – Remove
– Compressor Protection System – Test
– Compressor Protection System – Test
– Electronic Heat Control – Test
– Electronic Heat Control – Test
– Heater Performance – Test
– Heating and Air Conditioning Service Publications
– General Information
– General Information
– Machine Preparation for Disassembly and Assembly
– Refrigerant Expansion Valve System
– 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 Expansion Valve System
– Refrigerant Orifice Tube System
– General Information
Cat® Grade Control for D6N Track-Type Tractors
– Calibration
– CAN Data Link – Test
– Connector Locations
– Determining Diagnostic Trouble Codes
– Diagnostic Capabilities
– Diagnostic Trouble Codes
– Display Firmware Upgrade
– ECM – Configure
– ECM – Replace
– ECM Software – Install
– Electrical Connector – Inspect
– Electrical Power Supply – Test
– Emerging Symptom Information
– Features
– General Information
– General Information
– Machine Preparation for Troubleshooting
– Operator Control Switch (Switch to Ground) – Test
– Sensor (Data Link Type) – Test
– Sensor Signal (PWM) – Test
– Service Tools
– Solenoid Valve – Test
– Symptom Troubleshooting
– System Accuracy – Test
– System Components
– Visual Inspection
– Wiring Harness (Open Circuit) – Test
– Wiring Harness (Short Circuit) – Test
D6N Track-Type Tractor Monitoring System
– CAN Data Link – Test
– Connector Contact Description
– Data Link
– Data Link Configuration Status – Test
– Determining Diagnostic Trouble Codes
– Diagnostic Operation
– Diagnostic Trouble Codes
– Display Is Blank
– Display Menu
– Display Module
– Electrical Connector – Inspect
– Electrical Power Supply – Test
– Emerging Symptom Information
– General Information
– Machine Menu
– Menu Navigation
– Menus
– Menus – Hour Meter Display
– Module – Flash Program
– Module – Replace
– Monitoring System
– Operator Menu
– Operator Menu
– Output Components
– Pop-Up Messages
– Service Menu
– Service Tools
– Symptom Troubleshooting
– System Schematic
– Totals Menu
– Warning Operation
– Wiring Harness (Open Circuit) – Test
– Wiring Harness (Short Circuit) – Test
D6N Track-Type Tractor Systems
– Accumulator (Brake)
– Accumulator (Hydraulic)
– Accumulator (Pilot)
– Accumulator (Pilot) – Test and Charge
– Accumulator (Power Train)
– Accumulator (Power Train) – Charged
– Accumulator (Power Train) – Test and Charge
– Accumulator – Uncharged
– Additional Electrical Components
– Air Cleaner
– Air Conditioner Lines
– Air Precleaner
– Angle Cylinder (Bulldozer) – VPAT Only
– Bank Valve (Four)
– Bank Valve (Implement)
– Bank Valve (Three)
– Battery and Wiring Group
– Bevel and Transfer Gears
– Blower Fan
– Brake and Planetary
– Brake Pressure – Test
– Brake System
– Bulldozer Brace – Arm Group – SU
– Bulldozer Trunnion – SU Dozer Only
– Bulldozer Trunnion – Super LGP
– C-Frame
– C-Frame
– Cab Air Filter
– Cab Door – Forestry-Left-hand side
– Cab Door – Forestry-Right-hand side
– Cab Door – Left Hand
– Cab Door – Right Hand
– Cab Liner
– Calibration
– Calibration Error Codes
– Case and Frame
– Case and Frame – Super LGP
– Case Pressure (Steering Pump) – Check
– Communication Electronic Control Module (Product Link)
– Communication Electronic Control Module (Product Link)
– Communication Electronic Control Module (Product Link)
– Control Group (Implement)
– Control Group (Implement)
– Control Group (Steering and Transmission)
– Control Valve (Bulldozer Angle)
– Control Valve (Bulldozer Lift)
– Control Valve (Bulldozer Tilt)
– Control Valve (Ripper)
– Cover (Console)
– Cover (Console)
– Cover (Console)
– Cutting Edges and End Bits
– Cutting Edges and End Bits
– Cutting Edges and End Bits – LGP Foldable Blade
– Cutting Edges and End Bits – SU Dozer
– Cutting Edges and End Bits – XL Foldable Blade
– Cylinder Mounting – SU Bulldozer Only
– Cylinder Mounting – Super LGP
– Differential Drive and Brake Group
– Differential Steering System
– Drawbar
– Drive Shaft
– Electric Starting Motor
– Electric Starting Motor
– Electronic Control (HVAC System)
– Electronic Control (Hydraulic System)
– Electronic Control (Power Train System)
– Electronic Control (Steering System)
– Engine Mounting
– Equalizer Bar
– Equalizer Bar
– Equalizer Bar – Super LGP
– Ether Starting Aid
– Fast Fill Fuel Adapter
– Fender
– Fender – Heavy Duty
– Filter (Steering)
– Final Drive
– Final Drive
– Flood Lamp
– Flood Lamp
– Flood Lighting
– Fuel Lines
– Fuel Tank
– Fuel Tank – Fast Fill – Refueling
– Gear Pump (Power Train)
– General Information (HVAC System)
– General Information (Hydraulic System)
– General Information (Power Train System)
– General Information (Steering System)
– General Information (Undercarriage)
– Graphic Color Codes
– High Speed Oil Change Group
– HVAC System
– Hydraulic Oil Cooler and Bypass
– Hydraulic Tank and Filter
– Hydraulic Tank and Filter
– Idlers (Track) – Front- System One
– Idlers (Track) – Heavy Duty
– Idlers (Track) – LGP Waste- Heavy Duty
– Idlers (Track) – Rear-System One
– Joystick Control (Bulldozer)
– Lift Cylinder (Bulldozer) – SU Bulldozer Only
– Lift Cylinder (Bulldozer) – Super LGP
– Lift Cylinder (Bulldozer) – VPAT Bulldozer Only
– Limit Switch (Service Brake)
– Lines (Diagnostic)
– Lines (Steering)
– Location of Components (HVAC System)
– Location of Components (Hydraulic System)
– Location of Components (Power Train System)
– Location of Components (Steering System)
– Location of Components (Undercarriage)
– Machine Preparation
– Magnetic Screen
– Manifold and Relief Valve (Main)
– Neutral Adjustment (Steering Pump) – Test and Adjust
– Oil Filter (Case Drain)
– Oil Filter (Power Train)
– Oil Filter (Power Train)
– Operational Checks (Hydraulic System)
– Piston Motor (Steering)
– Piston Motor (Steering)
– Piston Pump (Implement)
– Piston Pump (Implement)
– Piston Pump (Implement) – Test and Adjust
– Piston Pump (Steering)
– Piston Pump (Steering)
– Pivot Bar
– Pivot Bar – Heavy-Duty Undercarriage
– Pivot Bar – Super LGP
– Pivot Shaft
– Position Sensor (Brake)
– Position Sensor (Decelerator)
– Position Sensor (Steering)
– Position Sensor (Steering)
– Power Train Oil Pump
– Pressure Switch (Refrigerant)
– Pump Lines
– Push Arm – Super LGP
– Radiator Guard
– Recoil Group
– Recoil Group
– Refrigerant Compressor
– Refrigerant Condenser
– Relief Valve (Charge) – Test and Adjust
– Relief Valve (Main)
– Relief Valve (Main)
– Relief Valve (Torque Converter Inlet)
– Relief Valve (Torque Converter Inlet)
– Relief Valve (Torque Converter Inlet) Pressure – Test and
– Relief Valve (Torque Converter Outlet)
– Relief Valve (Torque Converter Outlet)
– Relief Valve (Torque Converter Outlet) Pressure – Test and
– Relief Valve (Transmission) – Test and Adjust
– Resolver Network – Test
– Ripper
– Ripper Mounting
– Segmented Sprocket (Drive)
– Sensor (Inclination)
– Signal Resolver Network
– Speed Sensor (Torque Converter Output)
– Speed Sensor – Steering Motor
– Sprocket Speed (Final Drive) – Check
– Stable Blade Sensor – Test
– Steering and Brake Control Valve
– Steering Hydraulic Circuit – Test and Adjust
– Striker Bar
– Sweep Group
– Temperature Sender (Hydraulic Oil)
– Temperature Sensor (Air Conditioner) – Cab Air
– Temperature Sensor (Hydraulic Oil)
– Tilt Cylinder (Bulldozer)
– Tilt Cylinder (Bulldozer) – SU Bulldozer Only
– Tilt Cylinder (Bulldozer) – VPAT Bulldozer Only
– Toggle Switch (Work Light)
– Torque Converter
– Torque Converter (Lockup)
– Torque Converter Lockup Clutch Pressure – Test
– Track Carrier Roller
– Track Carrier Roller
– Track Guide Guard
– Track Guide Guard
– Track Guide Guard
– Track Guide Guard
– Track Idler
– Track Idler Cap
– Track Idler Cap
– Track Idler Cap – Front
– Track Idler Cap – System One Rear
– Track Roller (Double Flange)
– Track Roller (Double Flange) – General Duty Roller
– Track Roller (Single Flange)
– Track Roller (Single Flange) – General Duty Roller
– Track Roller – Double Flange-Heavy Duty
– Track Roller – Heavy Duty
– Track Roller – System One
– Track Roller Frame
– Track Roller Frames
– Track Roller Frames
– Track Roller Guard
– Track Roller Guard – Heavy Duty
– Track Roller Guard – System one
– Tracks
– Tracks
– Tracks – Heavy Duty
– Tracks – System One
– Transfer and Bevel Gears
– Transmission
– Transmission Clutch Pressure – Test
– Transmission Hydraulic Control
– Transmission Hydraulic Control
– Transmission Lubrication
– Transmission Lubrication Oil Pressure – Test
– Transmission Mounting
– Transmission Planetary
– Winch Mounting
– Window Wiper and Wiper Motor
Disassembly and Assembly C7.1 Engines for Caterpillar Built Machines
– Accessory Drive – Remove and Install – Accessory Drive SAE
– Accessory Drive – Remove and Install – Accessory Drive SAE
– Air Compressor – Remove and Install – Single Cylinder
– Air Compressor – Remove and Install – Twin Cylinder
– Alternator – Install
– Alternator – Remove
– Alternator Belt – Remove and Install
– Atmospheric Pressure Sensor – Remove and Install
– Bearing Clearance – Check
– Belt Tensioner – Remove and Install
– Boost Pressure Sensor – Remove and Install
– Camshaft – Remove and Install
– Camshaft Bearings – Remove and Install
– Camshaft Gear – Remove and Install
– Camshaft Position Sensor – Remove and Install
– Clean Emissions Module – Remove and Install
– Connecting Rod Bearings – Install – Connecting rods in position
– Connecting Rod Bearings – Remove – Connecting rods in
– Coolant Temperature Sensor – Remove and Install
– Crankcase Breather – Install
– Crankcase Breather – Remove
– Crankshaft – Install
– Crankshaft – Remove
– Crankshaft Front Seal – Remove and Install
– Crankshaft Front Seal – Remove and Install – Crankshaft Front
– Crankshaft Gear – Remove and Install
– Crankshaft Main Bearings – Remove and Install – Crankshaft
– Crankshaft Position Sensor – Remove and Install
– Crankshaft Rear Seal – Install
– Crankshaft Rear Seal – Remove
– Crankshaft Timing Ring – Remove and Install
– Cylinder Head – Install
– Cylinder Head – Remove
– DEF Injector and Mounting – Remove and Install
– Diesel Exhaust Fluid Lines – Remove and Install
– Diesel Exhaust Fluid Module – Assemble
– Diesel Exhaust Fluid Module – Disassemble
– Diesel Exhaust Fluid Pump – Remove and Install
– Diesel Exhaust Fluid Tank – Remove and Install
– ECM Mounting Bracket – Remove and Install
– Electric Starting Motor – Remove and Install
– Electronic Control (Diesel Exhaust Fluid) – Remove and Install
– Electronic Control Module – Remove and Install – Electronic
– Electronic Unit Injector – Install
– Electronic Unit Injector – Remove
– Engine Oil Cooler – Install – Engine Oil Cooler with a High
– Engine Oil Cooler – Install – Engine Oil Cooler with a Low
– Engine Oil Cooler – Remove – Engine Oil Cooler with a High
– Engine Oil Cooler – Remove – Engine Oil Cooler with a Low
– Engine Oil Filter Base – Remove and Install
– Engine Oil Filter Base – Remove and Install – Engine Oil Filter
– Engine Oil Pan – Install – Aluminum Oil Pan
– Engine Oil Pan – Remove – Aluminum Oil Pan
– Engine Oil Pan Plate – Remove and Install – Aluminum Oil Pan
– Engine Oil Pressure Sensor – Remove and Install
– Engine Oil Pump – Install
– Engine Oil Pump – Remove
– Exhaust Back Pressure Valve – Remove and Install
– Exhaust Cooler (NRS) – Remove and Install
– Exhaust Gas Valve (NRS) – Remove and Install
– Exhaust Manifold – Remove and Install
– Exhaust Manifold and Turbocharger – Install
– Exhaust Manifold and Turbocharger – Remove
– Fan – Remove and Install
– Fan Drive – Remove and Install
– Flexible Exhaust Pipe – Remove and Install
– Flow Control Valve – Remove and Install
– Flywheel – Install
– Flywheel – Install – Equipped with Rear Power Take-Off
– Flywheel – Remove
– Flywheel – Remove – Equipped with Rear Power Take-Off
– Flywheel Housing – Remove and Install
– Flywheel Housing – Remove and Install
– Flywheel Housing – Remove and Install
– Flywheel Housing – Remove and Install
– Flywheel Housing – Remove and Install
– Flywheel Housing – Remove and Install – Flywheel Housing that is
– Flywheel Housing – Remove and Install – Standard Housing
– Front Cover – Remove and Install
– Front Cover – Remove and Install – Heavy Duty Front Cover
– Fuel Filter Base – Remove and Install – Single Secondary Fuel
– Fuel Filter Base – Remove and Install – Twin Secondary Fuel
– Fuel Injection Lines – Install
– Fuel Injection Lines – Remove
– Fuel Injection Pump – Install
– Fuel Injection Pump – Remove
– Fuel Injection Pump Gear – Install
– Fuel Injection Pump Gear – Remove
– Fuel Manifold (Rail) – Remove and Install
– Fuel Pressure Sensor – Remove and Install
– Fuel Priming Pump – Remove and Install – Electric Fuel Lift
– Fuel Temperature Sensor – Remove and Install
– Gear Group (Front) – Remove and Install
– Gear Group (Front) – Remove and Install – Heavy Duty Gear
– Glow Plugs – Remove and Install
– Housing (Front) – Install
– Housing (Front) – Install – Heavy Duty Housing (Front)
– Housing (Front) – Remove
– Housing (Front) – Remove – Heavy Duty Housing (Front)
– Idler Gear – Install
– Idler Gear – Remove
– Idler Pulley – Remove and Install – Flat Idler Pulley
– Idler Pulley – Remove and Install – Grooved Idler Pulley
– Inlet Air Control – Install – NRS Inlet Air Mixer
– Inlet Air Control – Remove – NRS Inlet Air Mixer
– Inlet and Exhaust Valve Springs – Remove and Install
– Inlet and Exhaust Valves – Remove and Install
– Inlet Manifold Temperature Sensor – Remove and Install
– Lifter Group – Remove and Install – Hydraulic Lifter Group
– Manifold (DEF Heater) – Remove and Install
– Nitrogen Oxide Sensor – Remove and Install – Nitrogen Oxide
– Nitrogen Oxide Sensor – Remove and Install – Original
– Piston Cooling Jets – Remove and Install
– Pistons and Connecting Rods – Assemble
– Pistons and Connecting Rods – Disassemble
– Pistons and Connecting Rods – Install
– Pistons and Connecting Rods – Remove
– Pressure Sensor (Cooled Exhaust Gas) – Remove and Install –
– Rear Power Take-Off (RPTO) – Install
– Rear Power Take-Off (RPTO) – Remove
– Refrigerant Compressor – Remove and Install
– Relief Valve (Fuel) – Remove and Install
– Rocker Shaft – Assemble
– Rocker Shaft – Disassemble
– Rocker Shaft and Pushrod – Install
– Rocker Shaft and Pushrod – Remove
– Solenoid Valve (DEF Heater Coolant) – Remove and Install
– Soot Antenna – Remove and Install
– Support and Mounting (CEM) – Remove and Install
– Temperature Sensor (Cooled Exhaust Gas) – Remove and
– Temperature Sensor (DPF) – Remove and Install – Inlet and
– Turbocharger – Install – First Stage Turbocharger
– Turbocharger – Install – First Stage Turbocharger
– Turbocharger – Install – Second Stage Turbocharger
– Turbocharger – Install – Second Stage Turbocharger
– Turbocharger – Remove – First Stage Turbocharger
– Turbocharger – Remove – Second Stage Turbocharger
– Turbocharger Exhaust Temperature Sensor – Remove and
– Valve Mechanism Cover – Remove and Install
– Vibration Damper and Pulley – Install
– Vibration Damper and Pulley – Remove
– Voltage Load Protection Module – Remove and Install
– Wastegate Solenoid – Remove and Install
– Water Pump – Install
– Water Pump – Remove
– Water Separator and Fuel Filter (Primary) – Remove and
– Water Temperature Regulator – Remove and Install
Disassembly and Assembly D6N Track-Type Tractor Engine Supplement
– Air Cleaner – Remove and Install
– Alternator – Remove and Install
– Belt Tensioner – Remove and Install
– Clean Emissions Module – Remove and Install
– Cooling System Package (Radiator, Aftercooler, Oil Cooler) –
– Cooling System Package (Radiator, Aftercooler, Oil Cooler) –
– Cooling System Package (Radiator, Aftercooler, Oil Cooler) –
– Crankshaft Vibration Damper – Remove and Install
– DEF Injector and Mounting – Remove and Install
– Diesel Exhaust Fluid Filter – Remove and Install
– Diesel Exhaust Fluid Module – Assemble
– Diesel Exhaust Fluid Module – Disassemble
– Diesel Exhaust Fluid Module – Remove and Install
– Diesel Exhaust Fluid Pump – Remove and Install
– Electric Starting Motor – Remove and Install
– Electronic Control (Diesel Exhaust Fluid) – 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
– Exhaust Cooler (NRS) – Remove and Install
– Exhaust Elbow – Remove and Install
– Exhaust Gas Valve (NRS) – Remove and Install – Back Pressure
– Fan – Remove and Install
– Fan Drive – Remove and Install
– Fan Guard – Remove and Install
– Flexible Exhaust Pipe – Remove and Install
– Fumes Disposal Filter – Remove and Install
– Hood – Remove and Install
– Hydraulic Oil Cooler – Remove and Install
– Manifold (DEF Heater) – Remove and Install
– Nitrogen Oxide Sensor – Remove and Install
– Pressure Sensors (NRS Absolute, NRS Differential) – Remove
– Primary Fuel Filter, Water Separator and Base – Remove and
– Refrigerant Compressor – Remove and Install
– Secondary Fuel Filter and Base – Remove and Install
– Solenoid Valve (DEF Heater Coolant) – Remove and Install
– Soot Antenna – Remove and Install
– Soot Sensor – Remove and Install
– System Pressure – Release
– Temperature Sensor (Cooled Exhaust Gas) – Remove and
– Temperature Sensor (DPF Inlet, SCR Inlet) – Remove and
– Turbocharger – Remove and Install
– Voltage Control (Load Protection) – Remove and Install
– Water Pump (Engine) – 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 – Remove and Install
– Bulldozer (VPAT) – Remove and Install
– Bulldozer Angle Cylinder (VPAT) – Assemble
– Bulldozer Angle Cylinder (VPAT) – Disassemble
– Bulldozer Angle Cylinder (VPAT) – Remove and Install
– Bulldozer C-Frame (VPAT) – Remove and Install
– Bulldozer Lift Cylinder (VPAT) – Assemble
– Bulldozer Lift Cylinder (VPAT) – Disassemble
– Bulldozer Lift Cylinder (VPAT) – Remove and Install
– Bulldozer Tilt Cylinder (VPAT) – Assemble
– Bulldozer Tilt Cylinder (VPAT) – Disassemble
– 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 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 – Remove and Install
– Steering Sensor – Assemble
– Steering Sensor – Disassemble
– System Pressure – Release
Disassembly and Assembly D6N Track-Type Tractor Power Train
– Axle – Remove and Install
– Bevel and Transfer Gears – Assemble
– 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) –
– 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
– Relief Valve (Transmission Hydraulic Control) – Assemble
– Relief Valve (Transmission Hydraulic Control) – Disassemble
– Relief Valve (Transmission Hydraulic Control) – Remove and
– 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
– System Pressure – Release
– 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 – Conventional
– Track – Connect – SystemOne
– Track – Separate – Conventional
– Track – Separate – SystemOne
– Track Adjuster – Remove and Install
– Track Master Link (Clamp) – Remove and Install – System One
– Track Roller – Remove and Install
– Track Roller Frame (Front) – 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
– Feature
– Cover Page
– Information
– Component Location
– Machine Wiring
– Accugrade and Attachment Wiring
– Aftertreatment Next Gen (If Equipped)
– Connector Location
– Machine Wiring
– Accugrade and Attachment Wiring
– Aftertreatment Next Gen (If Equipped)
– Schematics
– Machine Wiring
– Accugrade and Attachment Wiring
– Aftertreatment Next Gen (If Equipped)
– Machine Views
– Machine Wiring
– Blade Sensor Wiring
– Cab Wiring (HVAC)
– Dash Wiring
– Engine Wiring (Left Side View)
– Engine Wiring (Right Side View)
– Headliner Wiring
– LH Console Wiring
– LH Fender Wiring
– RH Console Wiring
– RH Rear Chassis Wiring
– Transmission Wiring
– Accugrade and Attachment Wiring
– Headliner View
– LH Chassis View
– LH Fender View
– RH Chassis View
– RH Rear Chassis View
– Aftertreatment Next Gen (If Equipped)
– Pump Tank Unit
Schematic Caterpillar D6N Track-Type Tractor Electrical System
– Feature
– Cover Page
– Information
– Component Location
– Machine Wiring
– Accugrade and Attachment Wiring
– Aftertreatment Next Gen (If Equipped)
– Connector Location
– Machine Wiring
– Accugrade and Attachment Wiring
– Aftertreatment Next Gen (If Equipped)
– Schematics
– Machine Wiring
– Accugrade and Attachment Wiring
– Aftertreatment Next Gen (If Equipped)
– Machine Views
– Machine Wiring
– Air Conditioner / Cab Front
– Alternator / A/C Comp.
– Blade Sensors
– Cab / Fender LH
– Cab / Fender RH
– Cab Below View
– Cab Liner / Condensor
– Cab Rear
– Case Top View
– Console LH
– Console RH
– Dash / Seat
– Emission Module
– Engine
– Engine Compartment RH
– Engine Top View
– Transmission / Power Train
– Accugrade and Attachment Wiring
– 3D Accugrade Cab Receivers
– 3D Accugrade Implement Sensors
– Accugrade / Radiator
– Accugrade LH Fender / Rops
– Product Link
– Aftertreatment Next Gen (If Equipped)
– Pump Tank Unit
Schematic Caterpillar D6N Track-Type Tractor Hydraulic System
– Features
– Cover Page
– Information
– Component Location
– Tap Location
– Schematic
– Function Isolation Tools
– Grids On/Off
– All Circuits Off
– All Circuits On
– 577 (Lt Green)
– 613 (Dk Yellow)
– 021 (Orange)
– 032 (Red)
– 141 (Lt Orange)
– 190 (Dk Pink)
– 258 (Dk Purple)
– 305 (Lt Blue)
– 347 (Dk Green)
– 430 (Dk Gray)
– Machine Views
– Under Cab
– Ripper
– Remote Tap Panel
– Front Frame
Schematic Caterpillar D6N Track-Type Tractor Power Train System
– Features
– Cover Page
– Information
– Component Location
– Tap Location
– Fluid Power Symbols
– Electrical Symbols
– Schematic
– Machine Views
– Machine View
– Right Side Compartment View
Specifications C7.1 Engines for Caterpillar Built Machines
– Alternator
– Atmospheric Pressure Sensor
– Belt Tensioner
– Boost Pressure Sensor
– Camshaft
– Camshaft Bearings
– Connecting Rod
– Connecting Rod Bearing Journal
– Coolant Temperature Sensor
– Crankcase Breather
– Crankshaft
– Crankshaft Seals
– Cylinder Block
– Cylinder Head
– Cylinder Head Valves
– Diesel Exhaust Fluid Pump
– Diesel Exhaust Fluid Tank
– Electronic Control (Diesel Exhaust Fluid)
– Electronic Control Module
– Engine Design
– Engine Lifting Bracket
– Engine Oil Cooler
– Engine Oil Filter Base
– Engine Oil Pan
– Engine Oil Pressure
– Engine Oil Pressure Sensor
– Engine Oil Pump
– Exhaust Cooler (NRS)
– Exhaust Gas Valve (NRS)
– Exhaust Manifold
– Fan Drive
– Flexible Exhaust Pipe
– Flywheel
– Flywheel Housing
– Front Housing and Covers
– Fuel Filter Base – Primary Fuel Filter Base
– Fuel Filter Base – Single Secondary Fuel Filter Base
– Fuel Injection Lines
– Fuel Injection Nozzles
– Fuel Injection Pump
– Fuel Manifold (Rail)
– Fuel Transfer Pump – Electric Transfer Pump
– Gear Group (Front)
– Glow Plugs
– Injector (Diesel Exhaust Fluid)
– Inlet Manifold Temperature Sensor
– Lifter Group
– Main Bearing Journal
– Manifold (Diesel Exhaust Fluid)
– Nitrogen Oxide Sensor
– Piston and Rings
– Piston Cooling Jet
– Pressure Sensor (NOx Reduction System)
– Refrigerant Compressor
– Rocker Shaft
– Soot Antenna
– Speed/Timing Sensor
– Starter Motor
– Temperature Sensor (DPF Inlet)
– Temperature Sensor (Exhaust)
– Temperature Sensor (NOx Reduction System)
– Turbocharger – Single Turbocharger
– Turbocharger Exhaust Temperature Sensor
– Valve Mechanism Cover
– Vibration Damper and Pulley
– Water Pump
– Water Temperature Regulator and Housing
Testing and Adjusting & Systems Operation C7.1 Engines for Caterpillar Built Machines
– Aftertreatment SCR System Dosing – Test
– Air in Fuel – Test
– Air Inlet and Exhaust System – Inspect
– Air Inlet and Exhaust System – Series Turbochargers
– Air Inlet and Exhaust System – Single Turbocharger
– Alternator – Test
– Basic Engine
– Battery – Test
– Charging System – Test
– Clean Emissions Module
– Cleanliness of Fuel System Components
– Compression – Test
– Connecting Rod – Inspect
– Cooling System
– Cooling System – Check
– Cooling System – Inspect
– Cooling System – Test
– Cylinder Block – Inspect
– Cylinder Head – Inspect
– DEF Dosing Control System
– Diesel Exhaust Fluid Quality – Test
– Diesel Exhaust Fluid Tank – Flush
– Electric Starting System – Test
– Electrical System
– Electronic Control System
– Engine Oil Cooler – Inspect
– Engine Oil Pressure – Test
– Engine Oil Pump – Inspect
– Engine Valve Lash – Inspect
– Excessive Bearing Wear – Inspect
– Excessive Engine Oil Consumption – Inspect
– Exhaust Cooler (NRS) – Test
– Finding Top Center Position for No. 1 Piston
– Flywheel – Inspect
– Flywheel Housing – Inspect
– Fuel Injection
– Fuel Injection – Engines with a Primary and Secondary Fuel
– Fuel Injection Timing – Check
– Fuel Quality – Test
– Fuel System – Inspect
– Fuel System – Prime
– Gear Group (Front) – Time
– Gear Group – Inspect
– Glossary of Electronic Control Terms
– Increased Engine Oil Temperature – Inspect
– Introduction
– Lubrication System
– Piston Height – Inspect
– Piston Ring Groove – Inspect
– Position the Valve Mechanism Before Maintenance Procedures
– Power Sources
– Turbocharger – Inspect – Series Turbochargers
– Turbocharger – Inspect – Single Turbocharger
– V-Belt – Test
– Valve Depth – Inspect
– Valve Guide – Inspect
– Vibration Damper – Check
– Water Pump – Inspect
– Water Temperature Regulator – Test
Troubleshooting C7.1 Engines
– Acceleration Is Poor or Throttle Response Is Poor
– Aftertreatment Identification Module – Test
– Alternator Problem – Charging Problem and/or Noisy
– Battery Problem
– CAN Data Link – Test
– Clean Emissions Module Has High Oxygen Level
– Codes that Inhibit Operation of Aftertreatment System
– Component Location
– Configuration Parameters
– Coolant Contains Oil
– Coolant Level – Test
– Coolant Level Is Low
– Coolant Pressure Is Low
– Coolant Temperature Is High
– Cooling Fan – Calibrate – If Applicable
– Cooling Fan Control – Test – Hydraulic Driven Fan
– Cooling Fan Control – Test – Viscous Clutch Fan
– Cooling Fan Is Always ON
– Cooling Fan Reversing – Test – Hydraulic Driven Fan
– Cooling Fan Speed – Test
– Crankcase Breather Ejects Oil
– Crankcase Fumes Disposal Tube Has Oil Draining
– Customer Passwords
– Cylinder Is Noisy
– Data Link – Test
– Data Link Configuration Status – Test
– DEF Control Module Power – Test
– DEF Control Module Temperature Is High
– DEF Does Not Purge
– DEF Line Heater – Test
– DEF Module Does Not Respond
– DEF Pressure Is High
– DEF Pressure Is Low
– DEF Pump – Replace
– DEF Pump Motor – Test
– DEF Pump Pressure Sensor – Test
– DEF Pump Sensor Supply – Test
– DEF Return Valve – Test
– DEF Tank Level Is Low
– DEF Tank Sensor – Test
– DEF Tank Temperature Is High
– DEF Temperature Is Low
– Diagnostic Capabilities
– Diagnostic Trouble Codes
– Diesel Oxidation Catalyst Has Incorrect Inlet Temperature
– Diesel Oxidation Catalyst Has Low Conversion Efficiency
– Diesel Particulate Filter Collects Excessive Soot
– Diesel Particulate Filter Temperature Is Low
– ECM – Replace
– ECM – Replace
– ECM Software – Install
– ECM Will Not Accept Factory Passwords
– Electrical Connectors
– Electrical Connectors – Inspect
– Electrical Power Supply – Test
– Electronic Service Tool Does Not Communicate
– Electronic Service Tools
– Engine Cranks but Does Not Start
– Engine Does Not Crank
– Engine Has Early Wear
– Engine Has Mechanical Noise (Knock)
– Engine Misfires, Runs Rough or Is Unstable
– Engine Monitoring System
– 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
– Ether Starting Aid – Test
– Event Codes
– Exhaust Has Excessive Black Smoke
– Exhaust Has Excessive White Smoke
– Exhaust System Contains Coolant
– Exhaust System Contains Oil
– Exhaust Temperature Is High
– Factory Passwords
– Fuel Consumption Is Excessive
– Fuel Contains Water
– Fuel Filter Is Restricted
– Fuel Pressure Is Low
– Fuel Rail Pressure Problem
– Fuel Temperature Is High
– Fuel Transfer Pump – Test
– General Information
– Glow Plug Starting Aid – Test
– Idle Validation – Test
– Indicator Lamp Problem
– Injector Code – Calibrate
– Injector Data Incorrect – Test
– Injector Solenoid – Test
– Inlet Air Is Restricted
– Intake Manifold Air Pressure Is High
– Intake Manifold Air Pressure Is Low
– Intake Manifold Air Temperature Is High
– Mode Selection – Test
– Motorized Valve – Test
– NOx Conversion Is Low
– NOx Sensor – Test
– 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
– Power Take-Off – Test
– Relay – Test – ECM Power Relay
– Relay – Test – Start Relay
– SCR Catalyst Has Incorrect Inlet Temperature
– SCR Inducement Emergency Override
– SCR Warning System Problem
– Sensor (Data Link Type) – Test
– Sensor Calibration Required – Test
– Sensor Signal (Analog, Active) – Test – Sensors on the J1 ECM
– Sensor Signal (Analog, Active) – Test – Sensors on the J2 ECM
– Sensor Signal (Analog, Passive) – Test
– Sensor Signal (PWM) – Test
– Sensor Supply – Test
– Service Information Report
– Service Tool Error Identifiers
– Service Tool Features
– Shutdown (Ground Level) – Test
– Solenoid Valve – Test – Solenoid Valves that Connect to the
– Solenoid Valve – Test – Solenoid Valves that Connect to the
– Soot Sensor – Test
– Speed Control (Analog) – Test
– Speed Control (PWM) – Test
– Speed/Timing – Test
– Switch Circuits – Test – Air Filter Restriction Switch
– Switch Circuits – Test – Multiposition Throttle Switch
– System Overview
– Test ECM Mode
– Valve Lash Is Excessive
– Valve Position – Test
– Water in Fuel – Test
– Welding Precaution
Troubleshooting D6N Track-Type Tractor Electrohydraulic System
– Backup Alarm Does Not Function
– Brake Does Not Engage
– Brake Does Not Release
– CAN Data Link – Test
– Connector Contact Description
– Connector Locations
– Determining Diagnostic Trouble Codes
– Diagnostic Capabilities
– Diagnostic Trouble Codes
– ECM – Configure
– ECM – Replace
– ECM Location Code – Test
– ECM Software – Install
– Electrical Connector – Inspect
– Electrical Power Supply – Test
– Emerging Symptom Information
– Event Codes
– 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
– HVAC, Air Conditioning System
– HVAC, Automatic Temperature Control System
– HVAC, Condensate Drainage System
– HVAC, Control System
– HVAC, General Troubleshooting
– HVAC, Heating System
– HVAC, Required Tools
– HVAC, Visual Inspection
– 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 Movement Jerks While Operating
– Machine Preparation for Troubleshooting
– Operator Control Switch (Switch to Ground) – Test
– Parameter – Test
– Power Train Oil
– Power Train Oil Contains Air
– Power Train Oil Temperature Is High
– Power Train System Pressure Is Low
– Relay – Test
– Ripper Does Not Function
– Sensor (Data Link Type) – Test
– Sensor Signal (Analog, Active) – Test
– Sensor Signal (Analog, Passive) – Test
– Sensor Signal (PWM) – Test
– Sensor Supply – Test
– Service Tools
– Solenoid Valve (Switch Controlled) – Test
– Solenoid Valve – Test
– Speed Sensor (Dual Signal) – Test
– Speed Sensor – Test
– 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
– Wiring Harness (Open Circuit) – Test
– Wiring Harness (Short Circuit) – Test