Complete workshop & 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.

FILELIST:
├── 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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