Complete workshop repair service manual with electrical wiring diagrams for Caterpillar 303.5E2 CR, 304E2 CR, 304.5E2 XTC, 305E2 CR, 305.5E2, 305.5E2 CR Mini Hydraulic Excavators. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Caterpillar 303.5E2 CR, 304E2 CR, 304.5E2 XTC, 305E2 CR, 305.5E2, 305.5E2 CR Mini Hydraulic Excavators service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

M0069048 - Troubleshooting (304E2 CR, 305E2 CR, 305.5E2 CR Mini Hydraulic Excavator Machine ECM)
   CAN Data Link - Test.pdf
   Connector Contact Description.pdf
   Connector Locations.pdf
   Determining Diagnostic Trouble Codes.pdf
   Diagnostic Capabilities.pdf
   Diagnostic Trouble Codes.pdf
   ECM - Configure.pdf
   ECM - Replace.pdf
   ECM Software - Install.pdf
   Electrical Connector - Inspect.pdf
   Electrical Power Supply - Test.pdf
   Engine Speed Control - Test.pdf
   Event Codes.pdf
   General Information.pdf
   Operator Control Switch (Switch to Ground) - Test.pdf
   Sensor Signal (Analog, Passive) - Test.pdf
   Sensor Signal (PWM) - Test.pdf
   Sensor Supply - Test.pdf
   Service Tools.pdf
   Solenoid Valve - Test.pdf
   System Schematic.pdf
   Wiring Harness (Open Circuit) - Test.pdf
   └── Wiring Harness (Short Circuit) - Test.pdf
UENR4294 - Systems Operation (303.5E2 CR, 304E2 CR, 304.5E2 XTC, 305E2 CR, 305.5E2 CR Mini Hydraulic Excavators Hydraulic System)
   Accumulator (Pilot).pdf
   Blade Hydraulic System.pdf
   Boom Hydraulic System.pdf
   Bucket Hydraulic System.pdf
   Bypass Valve (Return) - Bypass Check Valve.pdf
   Check Valve (Load).pdf
   Check Valve (Return Makeup) - Slow Return Check Valve.pdf
   Cylinders (Boom, Stick and Bucket).pdf
   Displacement Change Valve.pdf
   Final Drive.pdf
   General Information.pdf
   Hydraulic Oil Cooler.pdf
   Hydraulic Tank and Filter.pdf
   Main Control Valve.pdf
   Main Hydraulic Pump.pdf
   Main Hydraulic System (1).pdf
   Main Hydraulic System (2).pdf
   Oil Makeup (Swing System).pdf
   Oil Makeup (Travel System).pdf
   One-Way Flow Hydraulic System.pdf
   Pilot Hydraulic System.pdf
   Pilot Valve (Joystick).pdf
   Pilot Valve (Swing Parking Brake).pdf
   Pilot Valve (Travel).pdf
   Pump Control (Main Hydraulic).pdf
   Quick Coupler System - If Equipped.pdf
   Relief Valve (Line).pdf
   Relief Valve (Swing).pdf
   Return Hydraulic System.pdf
   Solenoid Valve (Hydraulic Lockout).pdf
   Stick Hydraulic System.pdf
   Swing Drive.pdf
   Swing Hydraulic System.pdf
   Swing Motor.pdf
   Swivel.pdf
   Travel Counterbalance Valve.pdf
   Travel Hydraulic System.pdf
   Travel Motor.pdf
   Travel Parking Brake.pdf
   └── Two-Way Flow Hydraulic System.pdf
UENR4294 - Testing & Adjusting (303.5E2 CR, 304E2 CR, 304.5E2 XTC, 305E2 CR, 305.5E2 CR Mini Hydraulic Excavators Hydraulic System)
   Accumulator (Pilot) - Test and Charge.pdf
   Cutoff Pressure (Main Pump) - Test and Adjust.pdf
   Cylinder Drift - Check.pdf
   Cylinder Speed - Check.pdf
   Engine Performance - Test - Engine Speed.pdf
   General Testing and Adjusting Information.pdf
   Hydraulic System Air - Purge.pdf
   Hydraulic System Pressure - Release.pdf
   Machine Drift on a Slope - Check.pdf
   Main Hydraulic Pump Air - Purge.pdf
   Main Pump (Flow) - Test.pdf
   Main Pump Solenoid - Calibrate.pdf
   Margin Pressure - Test and Adjust.pdf
   Operational Checks.pdf
   Pump Control (Output Flow) - Adjust.pdf
   Relief Valve (Auxiliary) - Test and Adjust - If Equipped.pdf
   Relief Valve (Line) - Test and Adjust.pdf
   Relief Valve (Pilot) - Test and Adjust.pdf
   Relief Valve (Swing) - Test and Adjust.pdf
   Specifications.pdf
   Swing Motor - Test - Measurement of Case Drain Oil.pdf
   Swing Speed and Overswing on Level Ground - Check.pdf
   Swing Speed and Swing Drift on a Slope - Check.pdf
   Travel Motor - Test - Measurement of Case Drain Oil.pdf
   Travel on Level Ground - Test - Optional Test.pdf
   Travel on Level Ground - Test.pdf
   └── Visual Inspection.pdf
UENR5188 - Schematic (303.5E2 CR, 304E2 CR, 304.5E2 XTC, 305E2 CR, 305.5E2 CR Mini Excavator Hydraulic System)
   └── Main.pdf
UENR5591 - Disassembly & Assembly (303.5E2 CR, 304E2 CR, 305.5E2 CR, 305E2 CR Mini Hydraulic Excavators Engine Supplement)
   Alternator - Remove and Install (1).pdf
   Alternator - Remove and Install (2).pdf
   Battery - Remove and Install.pdf
   Electric Starting Motor - Remove and Install.pdf
   Engine and Main Hydraulic Pump - Remove and Install.pdf
   Fan - Remove and Install.pdf
   Fuel Filter and Water Separator Base - Remove and Install.pdf
   Fuel Shutoff Solenoid - Remove and Install.pdf
   Fuel Transfer and Priming Pump - Remove and Install.pdf
   Hood - Remove and Install.pdf
   Hydraulic Oil Cooler - Remove and Install.pdf
   Muffler - Remove and Install.pdf
   Oil Pan - Remove and Install.pdf
   Radiator - Remove and Install.pdf
   Refrigerant Compressor - Remove and Install.pdf
   Refrigerant Condenser - Remove and Install.pdf
   Refrigerant Receiver-Dryer - Remove and Install.pdf
   System Pressure - Release.pdf
   Water Pump - Remove and Install.pdf
   └── Water Temperature Regulator - Remove and Install.pdf
UENR5592 - Disassembly & Assembly (303.5E2 CR, 304E2 CR, 305.5E2 CR, 305E2 CR Mini Hydraulic Excavators Machine Systems)
   Accumulator (Hydraulic Pilot) - Remove and Install.pdf
   Blade Cylinder - Remove and Install.pdf
   Blade - Remove and Install.pdf
   Blower Motor (Air Conditioner, Heater) - Remove and Install.pdf
   Boom Cylinder - Remove and Install.pdf
   Boom - Remove and Install.pdf
   Bucket Cylinder - Remove and Install.pdf
   Bucket Linkage - Remove and Install.pdf
   Bucket - Remove and Install.pdf
   Cab - Remove and Install.pdf
   Canopy - Remove and Install.pdf
   Counterweight - Remove and Install.pdf
   Duo-Cone Conventional Seals - Install.pdf
   Evaporator Coil - Remove and Install.pdf
   Final Drive and Travel Motor - Assemble.pdf
   Final Drive and Travel Motor - Disassemble.pdf
   Final Drive and Travel Motor - Remove and Install.pdf
   Front Idler, Recoil Spring and Hydraulic Track Adjuster - Remove and Install.pdf
   Front Idler - Remove and Install.pdf
   Fuel Tank - Remove and Install.pdf
   Heater Core - Remove and Install.pdf
   Heating and Air Conditioning Unit - Remove and Install.pdf
   Hydraulic Tank - Remove and Install.pdf
   Hydraulic Track Adjusters - Remove and Install.pdf
   Load Control Valve (Boom Cylinder) - Remove and Install.pdf
   Main Control Valve - Assemble.pdf
   Main Control Valve - Disassemble.pdf
   Main Control Valve - Remove and Install.pdf
   Main Hydraulic Pump - Assemble.pdf
   Main Hydraulic Pump - Disassemble.pdf
   Main Hydraulic Pump - Remove and Install.pdf
   Pilot Valve (Travel) - Assemble.pdf
   Pilot Valve (Travel) - Disassemble.pdf
   Pilot Valve (Travel) - Remove and Install.pdf
   Platform - Remove and Install.pdf
   Seat - Remove and Install.pdf
   Selector Valve (Alternate Pattern Control) - Remove and Install.pdf
   Sprocket - Remove and Install.pdf
   Stick Cylinder - Remove and Install.pdf
   Stick - Remove and Install.pdf
   Support (Swing Boom) - Remove and Install.pdf
   Swing Boom Cylinder - Remove and Install.pdf
   Swing Motor and Swing Drive - Assemble.pdf
   Swing Motor and Swing Drive - Disassemble.pdf
   Swing Motor and Swing Drive - Remove and Install.pdf
   Swivel - Assemble.pdf
   Swivel - Disassemble.pdf
   Swivel - Remove and Install.pdf
   System Pressure - Release.pdf
   Track Carrier Roller - Remove and Install.pdf
   Track - Connect.pdf
   Track - Remove and Install.pdf
   Track Roller - Remove and Install.pdf
   Track - Separate.pdf
   Upper Frame and Undercarriage Frame - Connect.pdf
   └── Upper Frame and Undercarriage Frame - Separate.pdf
UENR5697 - Specifications (303.5E2 CR, 304.5E2 XTC, 304E2 CR, 305.5E2 CR, 305E2 CR Mini Hydraulic Excavators Machine System Specifications)
   Accumulator (Pilot).pdf
   Air Cleaner.pdf
   Air Conditioner Lines.pdf
   Air Conditioner.pdf
   Air Lines.pdf
   Auxiliary Hydraulic Lines.pdf
   Blade Cylinder - Angle.pdf
   Blade Cylinder.pdf
   Blade Lift Cylinder.pdf
   Blade Mounting.pdf
   Boom - 2.406 m (7.8937 ft).pdf
   Boom - 2.506 m (8.22179 ft).pdf
   Boom - 2.578 m (8.4580 ft).pdf
   Boom - 2.722 m (8.9305 ft).pdf
   Boom Cylinder.pdf
   Boom Lines.pdf
   Bucket Cylinder.pdf
   Bucket Lines.pdf
   Bucket Linkage.pdf
   Bucket Mounting.pdf
   Cab Air Duct.pdf
   Cab Heater and Mounting.pdf
   Cab Heater.pdf
   Cab.pdf
   Cab - Trim Group.pdf
   Control Valve - Swing Valve.pdf
   Counterweight.pdf
   Coupler Lines.pdf
   Cylinder Guard.pdf
   Disconnect Switch.pdf
   Electric Horn.pdf
   Engine Mounting.pdf
   Flood Lighting - Boom.pdf
   Flood Lighting - Cab.pdf
   Flood Lighting - Canopy.pdf
   Front Idler.pdf
   Front Lines.pdf
   Fuel Lines - Filter.pdf
   Fuel Tank and Mounting.pdf
   Governor Control.pdf
   Handrail.pdf
   Heater Lines.pdf
   Hoist Solenoid Valve.pdf
   Hydraulic Accumulator and Mounting.pdf
   Hydraulic Hand Control.pdf
   Hydraulic Tank and Filter.pdf
   Joystick Control.pdf
   Main Control Valve.pdf
   Main Hydraulic Pump Mounting.pdf
   Main Hydraulic Pump.pdf
   Manual Valve (Auxiliary).pdf
   Mounting Bracket - Tilt Group.pdf
   Oil Filter (Hydraulic).pdf
   Operator Console - Left Hand.pdf
   Operator Console - Right Hand.pdf
   Pilot Lines.pdf
   Pilot Operated Hydraulic Control.pdf
   Pilot Valve (Joystick).pdf
   Pilot Valve (Travel).pdf
   Pressure Sensor.pdf
   Pump Control Valve.pdf
   Pump Lines.pdf
   Quick Coupler.pdf
   Radiator and Hydraulic Oil Cooler.pdf
   Radio (AM357200242FM).pdf
   Rear Cover.pdf
   Rear View Mirror.pdf
   Recoil Spring.pdf
   Refrigerant Compressor Mounting.pdf
   Refrigerant Compressor.pdf
   Refrigerant Condenser and Mounting.pdf
   Relief Valve.pdf
   Return Lines.pdf
   Solenoid Valve (Quick Coupler).pdf
   Sound Suppression Cover.pdf
   Sprocket.pdf
   Stick - 1.266 m (4.1535 ft).pdf
   Stick - 1.321 m (4.3340 ft).pdf
   Stick - 1.424 m (4.6719 ft).pdf
   Stick - 1.566 m (5.1378 ft).pdf
   Stick - 1.621 m (5.3182 ft).pdf
   Stick - 1.7565 m (5.76280 ft).pdf
   Stick - 1.824 m (5.9843 ft).pdf
   Stick Cylinder.pdf
   Stick Lines.pdf
   Swing Boom Cylinder.pdf
   Swing Cylinder Lines.pdf
   Swing Drive Mounting.pdf
   Swing Frame.pdf
   Swing Gear and Bearing.pdf
   Swivel (1).pdf
   Swivel (2).pdf
   Track Carrier Roller.pdf
   Track.pdf
   Track Roller (Center Flange).pdf
   Track Roller Mounting.pdf
   Travel Motor and Mounting.pdf
   Travel Motor Lines - Angle Blade.pdf
   Travel Motor Lines.pdf
   Upper Frame.pdf
   Window Wiper Motor.pdf
   Window Wiper.pdf
   Wiring (Cab).pdf
   └── Wiring (Console).pdf
UENR6663 - Schematic (304E2 CR, 305E2 CR, 305.5E2 CR Mini Excavator Electrical System)
   Collage.pdf
   └── Main.pdf
UENR6974 - Schematic (304E2 CR, 305E2 CR, 305.5E2 CR Mini Hydraulic Excavator Electrical System)
   Collage.pdf
   └── Main.pdf
UENR7460 - Schematic (304E2 CR, 305E2 CR, 305.5E2 CR Mini Excavator Electrical System)
   └── Main.pdf
└── UENR7461 - Schematic (304E2 CR, 305E2 CR, 305.5E2 CR Mini Hydraulic Excavator Electrical System)
└── Main.pdf
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