Service manual Caterpillar 908M Compact Wheel Loader with C3.3B Engine | H8800001-UP

906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loaders Electrohydraulic System
– Anti-Theft Keypad
– Calibration
– CAN Data Link – Test
– Connector Locations
– Data Link
– Determining Diagnostic Trouble Codes
– Diagnostic Capabilities
– Diagnostic Trouble Codes
– Electrical Connector – Inspect
– Electrical Power Supply – Test
– Electronic Control Module
– Electronic Control Module (ECM) – Configure
– Electronic Control Module (ECM) – Flash Program
– Electronic Control Module (ECM) – Replace
– Emerging Symptom Information
– Event Codes
– Features
– General Information
– General Information
– Input Components
– Operator Control Switch (Switch to Ground) – Test
– Output Components
– Sensor Signal (Analog, Active) – Test
– Sensor Signal (Analog, Passive) – Test
– Sensor Signal (PWM) – Test
– Sensor Supply – Test
– Service Tools
– Solenoid Valve – Test
– Speed Sensor – Test
– Symptom Troubleshooting
– System Schematic – Electrohydraulic System
– Transfer Drive System Troubleshooting
– Wiring Harness (Open Circuit) – Test
– Wiring Harness (Short Circuit) – Test
906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loaders Hydraulic and Steering System
– Accumulator (Pilot) – Test and Charge
– Control Manifold (Boosted Auxiliary Hydraulic Flow) – If
– Gear Motor (Hydraulic Fan)
– Gear Pump (Hydraulic Fan)
– General Information (Hydraulic System)
– General Information (Steering System)
– Hydraulic Fan Speed – Test and Adjust
– Hydraulic Fan System
– Hydraulic Oil Contamination – Test
– Implement Cycle Time – Check
– Lift and Tilt Cylinder Drift – Check
– Location of Components (Fan Hydraulic System)
– Location of Components (Hydraulic System)
– Location of Components (Steering System)
– Lowering Control Valve (Lift Arms) – Test
– Machine Preparation for Testing and Adjusting
– Main Control Valve
– Main Hydraulic System
– Metering Pump (HMU)
– Pilot Hydraulic System
– Quick Coupler
– Quick Coupler Pressure – Check
– Relief Valve (Main) – Test and Adjust
– Ride Control System – If Equipped
– Steering System Pressure – Test
– System Pressure – Release
– Visual Inspection
906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loaders Power Train
– Brake System Air – Purge – 20 KILOMETER PER HOUR
– Brake System Air – Purge – 35 KILOMETER PER HOUR
– Creeper Control
– Differential
– Differential Backlash and Bearings – Adjust
– Differential Pinion Preload – Adjust
– Drive Pump Swash Plate Signal Oil Pressure – Test
– Front Axle
– General Information
– Hydrostatic System – Flush and Fill
– Hydrostatic System – Test and Adjust
– Hydrostatic System – Test and Adjust
– Machine Preparation for Testing and Adjusting
– Parking Brake – Test and Adjust – 20 KILOMETER PER
– Parking Brake – Test and Adjust – 35 KILOMETER PER HOUR
– Piston Motor (Hydrostatic)
– Piston Pump (Hydrostatic)
– Rear Axle
– Service Brake – Test and Adjust
Disassembly and Assembly 906, 907 and 908 Compact Wheel Loaders Power Train
– Differential and Bevel Gear (Locking) – Assemble
– Differential and Bevel Gear (Locking) – Disassemble
– Differential and Bevel Gear (Locking) – Install
– Differential and Bevel Gear (Locking) – Remove
– Drive Shaft – Remove and Install
– Final Drive Planetary – Assemble
– Final Drive Planetary – Disassemble
– Final Drive Planetary – Install
– Final Drive Planetary – Remove
– Front Axle Group – Install
– Front Axle Group – Remove
– Hydrostatic Pump Drive Mounting Hub and Flange – Install
– Hydrostatic Pump Drive Mounting Hub and Flange – Remove
– Master Cylinder (Front Brake) – Remove and Install
– Parking Brake (High Speed Axle) – Install
– Parking Brake (High Speed Axle) – Remove
– Piston Motor (Hydrostatic) – Assemble
– Piston Motor (Hydrostatic) – Assemble
– Piston Motor (Hydrostatic) – Disassemble
– Piston Motor (Hydrostatic) – Disassemble
– Piston Motor (Hydrostatic) – Install
– Piston Motor (Hydrostatic) – Remove
– Piston Pump (Hydrostatic) – Assemble
– Piston Pump (Hydrostatic) – Disassemble
– Piston Pump (Hydrostatic) – Install
– Piston Pump (Hydrostatic) – Remove
– Rear Axle and Transfer Drive Group – Install
– Rear Axle and Transfer Drive Group – Remove
– Service and Parking Brake (Standard Axle) – Install
– Service and Parking Brake (Standard Axle) – Remove
– Solenoid Valve and Mounting (Axle Speed Select) – Assemble
– Solenoid Valve and Mounting (Axle Speed Select) – Disassemble
– Solenoid Valve and Mounting (Axle Speed Select) – Install
– Solenoid Valve and Mounting (Axle Speed Select) – Remove
– Steering Frame Lock – Separate and Connect
– System Pressure – Release
– Tire and Rim – Remove and Install
– Transfer Drive Group (Hydrostatic) (High Speed) –
– Transfer Drive Group (Hydrostatic) (High Speed) – Assemble
– Transfer Drive Group (Hydrostatic) (Standard Speed) –
– Transfer Drive Group (Hydrostatic) (Standard Speed) –
– Wheel and Brake Group (Front) (High Speed Axle) –
– Wheel and Brake Group (Front) (High Speed Axle) – Assemble
– Wheel and Brake Group (Front) (High Speed Axle) – Install
– Wheel and Brake Group (Front) (High Speed Axle) – Remove
Disassembly and Assembly 906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loader Machine Systems
– Blower Motor (Air Conditioner and Heater) – Remove and
– Cab – Remove and Install
– Control Manifold (Auxiliary) – Remove and Install
– Control Manifold (Differential Lock) (Hydraulic Lockout) –
– Control Manifold (Differential Lock) (Hydraulic Lockout) –
– Control Manifold – Remove and Install – (Differential Lock)
– Counterweight – Remove and Install
– Counterweight – Remove and Install
– Coupler Cylinder – Remove and Install
– Electrohydraulic Control (Joystick) – Remove and Install
– Evaporator Coil and Heater Coil – Remove and Install
– Fuel Tank – Remove and Install
– Gear Pump (Implement) (Steering) (Hydraulic Fan) –
– Gear Pump (Implement) (Steering) (Hydraulic Fan) – Assemble
– Gear Pump (Implement) (Steering) (Hydraulic Fan) – Install
– Gear Pump (Implement) (Steering) (Hydraulic Fan) – Remove
– Hydraulic Accumulator (Pilot Oil) – Remove and Install
– Hydraulic Oil Filter – Remove and Install
– Hydraulic Tank – Remove and Install
– Joystick Control – Remove and Install
– Lift Arms – Remove and Install
– Lift Cylinder – Remove and Install
– Loader Frame from Rear Frame – Separate
– Loader Frame to Rear Frame – Connect
– Main Control Valve – Assemble
– Main Control Valve – Disassemble
– Main Control Valve – Remove and Install
– Metering Pump (HMU) – Remove and Install
– Piston Pump (Hydrostatic) – Assemble
– Piston Pump (Hydrostatic) – Disassemble
– Piston Pump (Hydrostatic) – Remove and Install
– Quick Coupler – Remove and Install
– Ride Control Accumulator – Remove and Install
– Ride Control Manifold – Remove and Install
– Seat – Remove and Install
– Solenoid Valve and Mounting (Coupler) – Remove and Install
– Steering Column – Remove and Install
– Steering Cylinder – Remove and Install
– Steering Frame Lock – Separate and Connect
– Steering Frame Lock – Separate and Connect
– Steering Wheel – Remove and Install
– System Pressure – Release
– System Pressure – Release
– Tilt Cylinder – Remove and Install
– Tilt Lever – Remove and Install
– Tilt Link – Remove and Install
– Window Wiper and Wiper Motor (Front) – Remove and Install
– Window Wiper and Wiper Motor (Rear) – Remove and Install
– Work Tool Positioner (Return To Dig) – Remove and Install
Disassembly and Assembly 906M Compact Wheel Loader Engine Supplement
– Air Cleaner – Remove and Install
– Alternator – Remove and Install
– Battery – Remove and Install
– Electric Starting Motor – Remove and Install
– Engine – Install
– Engine – Remove
– Fuel Priming Pump and Primary Filter (Water Separator) –
– Gear Motor (Hydraulic Fan) – Install
– Gear Motor (Hydraulic Fan) – Remove
– Hood – Remove and Install
– Radiator – Install
– Radiator – Remove
– Steering Frame Lock – Separate and Connect
– Steering Frame Lock – Separate and Connect
– System Pressure – Release
– System Pressure – Release
– Water Pump – Remove and Install
– Water Temperature Regulator – Remove and Install
Disassembly and Assembly C3.3B Engines for Caterpillar Built Machines
– Alternator – Remove and Install
– Bearing Clearance – Check
– Boost Pressure Sensor – Remove and Install
– Bridge Dowels – Remove and Install
– Camshaft and Valve Lifters – Remove and Install
– Camshaft Gear – Remove and Install
– Camshaft Position Sensor – Remove and Install
– Camshaft Position Sensor Bushing – Remove and Install
– Connecting Rod Bearings – Remove and Install
– Coolant Temperature Sensor – Remove and Install
– Crankshaft and Main Bearings – Install
– Crankshaft and Main Bearings – Remove
– Crankshaft Front Seal – Remove and Install
– Crankshaft Position Sensor – Remove and Install
– Crankshaft Pulley – Remove and Install
– Crankshaft Rear Seal and Wear Sleeve – Install – Includes
– Crankshaft Rear Seal and Wear Sleeve – Remove – Includes
– Cylinder Head – Remove and Install
– Diesel Particulate Filter – Assemble
– Diesel Particulate Filter – Disassemble
– Diesel Particulate Filter – Remove and Install
– Electric Starting Motor – Remove and Install
– Electronic Unit Injector – Remove and Install
– Engine Oil Cooler – Remove and Install
– Engine Oil Pan – Remove and Install
– Engine Oil Pressure Sensor – Remove and Install
– Engine Oil Pump – Remove and Install
– Engine Oil Relief Valve – Remove and Install
– Exhaust Gas Recirculation Valve – Remove and Install
– Exhaust Manifold – Remove and Install
– Flywheel – Remove and Install
– Flywheel Housing – Remove and Install
– Fuel Injection Lines – Remove and Install
– Fuel Injection Pump – Remove and Install
– Fuel Manifold (Rail) – Remove and Install
– Fuel Manifold (Rail) – Remove and Install
– Fumes Disposal Filter – Remove and Install
– Glow Plugs – Remove and Install
– Housing (Front) – Remove and Install
– Idler Gear – Remove and Install
– Inlet Air Temperature Sensor – Remove and Install
– Inlet and Exhaust Valve Guides – Remove and Install
– Inlet and Exhaust Valve Springs – Remove and Install
– Inlet and Exhaust Valves – Remove and Install
– Inlet Manifold – Remove and Install
– Pistons and Connecting Rods – Assemble
– Pistons and Connecting Rods – Disassemble
– Pistons and Connecting Rods – Remove and Install
– Pressure Sensor (Mass Air Flow) – Remove and Install
– Rocker Shaft – Assemble
– Rocker Shaft – Disassemble
– Rocker Shaft and Push Rod – Remove and Install
– Turbocharger – Remove and Install
– V-Belts – Remove and Install
– Valve Mechanism Cover – Remove and Install
– Water Pump – Remove and Install
– Water Temperature Regulator – Remove and Install
Schematic Caterpillar 906K, 907K AND 908K 906M, 907M AND 908M Compact Wheel Loader Hydraulic System
– Features
– Cover Page
– Information
– Component Location
– Tap Location
– Schematic
– Machine Views
– Machine Views
Schematic Caterpillar 906M, 907M, 908M Compact Wheel Loader Electrical System
– Features
– Cover Page
– Information
– Component Location
– Vol 1 – Chassis Wiring
– Vol 2 – Cab Wiring
– Connector Location
– Vol 1 – Chassis Wiring
– Vol 2 – Cab Wiring
– Schematics
– Function Isolation Tools
– Grids On/Off
– All Circuits Off
– All Circuits On
– Vol 1 – Chassis Wiring
– 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)
– 509 (Lt Pink) (Engine Control)
– 613 (Dk Yellow) (Heat/AC)
– 4665 (Tan) (Turn/Wiper/Washer)
– CON 509 (J1939/1587 D.L.)
– CON 522 (CAN “B” D.L.)
– Vol 2 – Cab Wiring
– Unspecified Circuit
– Black (Ground)
– 032 (Red) (Battery Power)
– 640 (Blue) (Key Power)
– 021 (Orange) (Starting)
– 258 (Dk Purple) (Transmission Control)
– 613 (Dk Yellow) (Heat/AC)
– 4665 (Tan) (Turn/Wiper/Washer)
– CON 346 (CAT D.L.)
– CON 509 (J1939/1587 D.L.)
– Machine Views
– Vol 1 – Chassis Wiring
– Cab – Right Rear View
– Coupler – Left Side View
– Engine – Right Side View
– Right – Rear View
– Top Left – Rear View
– Top Left – Under Cab View
– Vol 2 – Cab Wiring
– Cab – Right Rear View
– Front Console
– RH Console – Right View
Specifications 906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loaders Hydraulic and Steering System
– Accumulator (Pilot)
– Articulated Hitch
– Auxiliary Hydraulic Lines
– Auxiliary Hydraulic Lines
– Auxiliary Hydraulic Lines
– Boom Lines
– Boom Lines
– Boom Lines
– Boom Lines
– Boom Lines
– Boom Lines
– Control Manifold (Differential Lock) (Hydraulic Lockout)
– Control Valve
– Control Valve
– Control Valve
– Coupler Cylinder
– Coupler Cylinder
– Coupler Lines
– Coupler Lines
– Gear Motor (Hydraulic Fan)
– Gear Motor (Hydraulic Fan)
– Gear Pump (Implement, Steering)
– Gear Pump (Implement, Steering)
– Hydraulic Filter and Lines
– Hydraulic Tank
– Joystick Control
– Joystick Control
– Lift Cylinder
– Lift Cylinder
– Lines (Hydraulic Fan)
– Lines (Hydraulic)
– Lines (Pump)
– Main Control Valve
– Main Control Valve
– Multipurpose Bucket Cylinder
– Oil Filter (Hydraulic) (Power Train)
– Oil Filter (Hydraulic) (Power Train)
– Piston Motor (Hydrostatic)
– Piston Motor (Hydrostatic)
– Position Sensor (Brake)
– Pressure Sensor (Service Brake Oil)
– Quick Coupler
– Quick Coupler
– Ride Control Accumulator
– Ride Control Manifold
– Solenoid Valve (Demand Fan)
– Steering Control
– Steering Cylinder
– Steering Lines
– Tilt Cylinder
– Tilt Cylinder
– Valve Mounting
– Valve Mounting
– Work Tool Control
Specifications 906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loaders Machine Systems
– Access Door
– Air Cleaner
– Air Cleaner
– Air Conditioner and Mounting
– Air Conditioner Lines
– Air Lines
– Air Lines
– Air Precleaner
– Belt Guard
– Cab Air Duct
– Cab Door
– Cab Heater Group – Mounting
– Cab Panel
– Coolant Lines
– Cutting Edge
– Cutting Edge
– Cutting Edge
– Engine Hood
– Exhaust Extension
– Fender – Front
– Fender – Rear
– Fuel Lines
– Fuel Lines
– Fuel Tank
– Fuel Tank
– Governor Control
– Governor Pedal
– Keypad Module
– Machine Electronic Control Module Mounting
– Mounting Bracket
– Operator Console
– Refrigerant Compressor Mounting
– Storage Box and Mounting
– Suction Fan
– Window Wiper and Washer
– Window Wiper and Washer
Specifications 906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loaders Power Train
– Control Manifold (Differential Lock) (Hydraulic Lockout)
– Creeper Control
– Differential and Bevel Gear (Locking)
– Differential and Bevel Gear (Locking)
– Drive Shaft
– Final Drive Planetary
– Foot Brake Control (Pedal)
– Foot Brake Control (Pedal)
– Front Axle Group
– Front Axle Group
– Hydraulic Caliper Brake (Parking) (Service)
– Hydraulic Tank
– Master Cylinder
– Motor Mounting (Hydrostatic)
– Oil Filter (Hydraulic) (Power Train)
– Oil Filter (Hydraulic) (Power Train)
– Parking Brake Control
– Piston Motor (Hydrostatic)
– Piston Motor (Hydrostatic)
– Pressure Sensor (Hydrostatic Drive Motor Oil)
– Rear Axle and Transfer Drive Group
– Rear Axle and Transfer Drive Group
– Rear Axle and Transfer Drive Group
– Rear Axle and Transfer Drive Group
– Service Brake Lines
– Service Brake Lines
– Service Brake Lines
– Solenoid Valve and Mounting (Axle Speed Select)
– Speed Sensor (Hydrostatic Drive Motor)
– Temperature Sensor (Hydraulic Oil)
– Transfer Drive (Hydrostatic)
– Transfer Drive (Hydrostatic)
– Wheel and Brake Group (Front) (High Speed Axle)
– Wheel and Tire
Specifications C3.3B Engines for Caterpillar Built Machines
– Alternator and Regulator
– Boost Pressure Sensor
– Camshaft
– Connecting Rod
– Coolant Temperature Sensor
– Crankcase Breather
– Crankshaft
– Cylinder Block
– Cylinder Head
– Cylinder Head Valves
– Diesel Particulate Filter
– Electric Starting Motor
– Engine Design
– Engine Design
– Engine Oil Cooler
– Engine Oil Pan
– Engine Oil Pump
– Exhaust Manifold
– Flywheel
– Flywheel Housing
– Fuel Injection Lines
– Fuel Injector
– Gear Group (Front)
– Piston and Rings
– Speed/Timing Sensor
– Valve Mechanism
– Valve Mechanism Cover
– Water Temperature Regulator
Systems Operation, Testing and Adjusting C3.3B Engines for Caterpillar Built Machines
– Air in Fuel – Test
– Air Inlet and Exhaust System
– Air Inlet and Exhaust System – Inspect
– Alternator – Test
– Basic Engine
– Battery – Test
– Compression – Test
– Connecting Rod Bearings – Inspect
– Cooling System
– Cooling System – Check – Overheating
– Cooling System – Inspect
– Cooling System – Test
– Cylinder Block – Inspect
– Electric Starting System – Test
– Electrical System
– Engine Crankcase Pressure (Blowby) – Test
– Engine Oil Pressure – Test
– Engine Oil Pump – Inspect
– Engine Speed – Check
– Engine Valve Lash – Inspect/Adjust – C3.3B Engines
– Excessive Bearing Wear – Inspect
– Excessive Engine Oil Consumption – Inspect
– Exhaust Temperature – Test
– Finding Top Center Position for No. 4 Piston
– Fuel Injector – Test
– Fuel Quality – Test
– Fuel System
– Fuel System – Inspect
– Fuel System – Inspect
– General Information
– General Information
– Lubrication System
– Main Bearings – Inspect
– Piston Ring Groove – Inspect
– Turbocharger – Inspect
– Water Temperature Regulator – Test
Troubleshooting C3.3B and C3.8 Engines for Caterpillar Built Machines
– Acceleration Is Poor or Throttle Response Is Poor
– Alternator Problem – Charging Problem and/or Noisy
– Battery Problem
– Cat ET Service Features – DEF Dosing System Test
– Component Location
– Coolant Contains Oil
– Coolant Level Is Low
– Coolant Temperature Is High
– Cooling Fan Is Always ON
– Cylinder Is Noisy
– Data Link – Test
– DEF Concentration Is Incorrect
– DEF Injector Trim File – Install – Injector Trim Code – Install
– DEF Line Heater – Test
– DEF Module Does Not Respond
– DEF Pressure Is High
– DEF Pressure Is Low
– DEF Pump – Test
– DEF Tank Level Is Low
– DEF Tank Temperature Is High
– DEF Tank Temperature Is Low
– Diagnostic Capabilities
– Diagnostic Trouble Codes
– Diesel Particulate Filter Active Regeneration Occurrence Is
– Diesel Particulate Filter Error
– Diesel Particulate Filter Regeneration Does Not Occur
– ECM – Replace
– ECM Memory – Test
– ECM Software – Install
– 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 Injector Trim File – Install
– Engine Misfires, Runs Rough or Is Unstable
– Engine Misfires, Runs Rough or Is Unstable
– Engine Monitoring System
– Engine Overspeeds
– Engine Shutdown Occurs Intermittently
– Engine Stalls at Low RPM
– Engine Top Speed Is Not Obtained
– Engine Vibration Is Excessive
– Exhaust Has Excessive White Smoke
– Exhaust System Contains Oil
– Exhaust Temperature Is High
– Fuel Consumption Is Excessive
– Fuel Rail Pressure Is High
– Fuel Rail Pressure Is Low
– Fuel Rail Temperature Is High
– General Information
– Injector Data Incorrect – Test
– Injector Data Incorrect – Test
– Injector Solenoid – Test
– Injector Solenoid – Test – Fuel Injector
– Injector Trim File – Install
– Intake Manifold Air Temperature Is High
– Motorized Valve – Test
– NOx Conversion Is Low
– NOx Reduction System (NRS) – Test
– NOx Sensor – Test
– Oil Consumption Is Excessive
– Oil Contains Coolant
– Oil Contains Fuel
– Oil Pressure Is Low
– Relay – Test – ECM Main Relay
– SCR Catalyst Has Incorrect Inlet Temperature
– Sensor Signal (Analog, Active) – Test
– Sensor Signal (Analog, Passive) – Test
– Sensor Supply – Test
– Service Information Report
– Solenoid Valve – Test – Pressure Relief Valve
– Solenoid Valve – Test – Solenoid Valves that Connect to the
– Solenoid Valve – Test – Solenoid Valves that Connect to the
– Solenoid Valve – Test – Suction Control Valve
– Speed/Timing – Test
– Starting Aid – Test
– Test ECM Mode
– Turbocharger Failure
– Valve Lash Is Excessive
– Welding Precaution