Kubota K018-4 Excavator Workshop Repair Manual
Kubota K018-4 Excavator Workshop Repair Manual
Kubota K018-4 Excavator Workshop Repair Manual
Kubota K018-4 Excavator Workshop Repair Manual
Kubota K018-4 Excavator Workshop Repair Manual
Kubota K018-4 Excavator Workshop Repair Manual

Kubota K018-4 Excavator Workshop Repair Manual

$32.00

🚜 Equipment
BrandKubota
TypeExcavator
ModelK018-4
📄 Documents
TypeRepair Manual
PublicationRY921-2120
LanguageEnglish
FormatPDF
No of Pages349

The Kubota K018-4 Mini Excavator is a versatile and efficient compact machine designed for a wide range of applications, including construction, landscaping, and utility work. Powered by a Kubota D902-E4-BH 3-cylinder diesel engine producing 15.2 net horsepower, the K018-4 combines strength with maneuverability to operate effectively in confined spaces. With an operating weight of approximately 1,700 kg and a maximum digging depth of 2,380 mm, it provides reliable power and reach for demanding excavation tasks.

The K018-4 is equipped with a variable track gauge, adjustable between 990 mm and 1,300 mm, offering superior stability on uneven terrain and compact access through narrow spaces. Its hydraulic system delivers 27 L/min auxiliary flow, supporting smooth operation of a wide variety of attachments. Bucket breakout force of 15.9 kN and arm breakout force of 8.3 kN ensure strong digging capability, while travel speeds of up to 4 km/h provide efficient job site mobility. Built with ROPS/TOPS/OPG Level 1 safety structures, the excavator emphasizes operator safety without compromising productivity.

The workshop repair manual provides complete service coverage for the K018-4, including safety fundamentals, general servicing, engine specifications, hydraulic systems, electrical wiring, cabin components, and detailed disassembly and assembly procedures. It also includes wiring and hydraulic schematics, torque specifications, lubrication intervals, and troubleshooting flow charts, ensuring precise diagnostics and long machine life.

Key Highlights

  • Kubota D902-E4-BH 3-cylinder diesel engine delivering 15.2 net hp
  • Operating weight: ~1,700 kg (canopy/cab versions)
  • Maximum digging depth: 2,380 mm (~7 ft 9.7 in)
  • Auxiliary hydraulic flow: 27 L/min for attachment versatility
  • Bucket breakout force: 15.9 kN; Arm breakout force: 8.3 kN
  • Variable track gauge: 990–1,300 mm for narrow access and stability
  • Travel speeds: 2.2 km/h (low) / 4.0 km/h (high)
  • ROPS/TOPS/OPG Level 1 safety-certified structures
  • Manual coverage: engine, hydraulics, electrical, cab, servicing, schematics, torque and lubrication charts

Table of Content

📙 Table of Contents

Kx018-4
  • KX018-4
    • CONTENTS
    • TO THE READER
    • I INFORMATION
      • INFORMATION
        • 1. SAFETY FIRST
        • 2. IN THE INTEREST OF WORK SAFETY
          • [1] WORKING SAFELY WITH THE EQUIPMENT MEANS ALWAYS FOLLOWING THESE INSTRUCTIONS:
            • (1) Precautions Before Working on the Mini-excavator
            • (2) Precautions Before Working on the Equipment
        • 3. LABELS DISPLAYED TO PROMOTE WORK SAFETY
          • [1] LOCATIONS
          • [2] LABEL MAINTENANCE
        • 4. MAIN SPECIFICATIONS
        • 5. DIMENSIONS
    • G GENERAL
      • GENERAL
        • 1. MACHINE INDENTIFICATION
        • 2. ENGINE INDENTIFICATION
          • [1] MODEL AND ENGINE SERIAL NUMBER
        • 3. GENERAL PRECAUTIONS
        • 4. PRECAUTIONS WHEN HANDLING ELECTRICAL PARTS AND WIRING
          • [1] WIRING
          • [2] FUSES
          • [3] CONNECTORS
          • [4] WASHING THE MINI-EXCAVATOR WITH A HIGH-PRESSURE WASHER
        • 5. TORQUE SPECIFICATION TABLE
          • [1] TORQUES FOR GENERAL USE NUTS AND BOLTS
          • [2] TORQUES OF STUD BOLTS
          • [3] TORQUE FOR HYDRAULIC HOSE FITTINGS
            • (1) Torque for Hydraulic Hose Fittings
            • (2) Torques of Lock-Nuts for Elbows with Male Seats and Adaptors with O-rings (Straight Threads)
          • [4] HOSE CLAMP SCREW TORQUE
        • 6. OIL AND WATER CAPACITY TABLE
        • 7. MAINTENANCE INTERVALS
          • [1] OPERATOR SERVICING
          • [2] SERVICING BY SKILLED PERSONAL OR KUBOTA DEALER
            • (1) For NA
            • (2) For AU
        • 8. DESCRIPTION OF PARTS
          • [1] BUCKET
          • [2] BUCKET INSTALLATION RELEVANT DIMENSIONS
          • [3] BLADE
          • [4] RUBBER CRAWLER
          • [5] TRUCK ROLLER, IDLER, SPROCKET
          • [6] CYLINDER
          • [7] DIAGRAM AND LIST OF FRONT PINS
          • [8] LIST OF FRONT BUSHING DIMENSIONS
        • 9. WEIGHTS OF PARTS
        • 10. QUALITY SPECIFICATIONS
    • 1 MACHINE BODY
      • SERVICING
        • 1. FRONT EQUIPMENT
          • [1] BUCKET INSTALLATION AND REMOVAL
          • [2] FRONT EQUIPMENT ATTACHMENT AND REMOVAL
          • [3] BLADE REMOVAL AND MOUNTING
        • 2. SWIVEL FRAME
          • [1] WEIGHT DISASSEMBLY/ASSEMBLY
          • [2] CANOPY REMOVAL AND MOUNTING
          • [3] FUEL TANK REMOVAL AND MOUNTING
          • [4] HYDRAULIC OIL TANK
            • (1) Hydraulic Oil Tank Components
          • [5] ENGINE
            • (1) Engine Removal and Mounting
            • (2) Engine Mounts
            • (3) Muffler
            • (4) Arch
            • (5) Radiator, Oil Cooler
          • [6] OPERATING LEVER ASSEMBLY
            • (1) Travel Lever
            • (2) Blade Lever
            • (3) Adjustable Track Lever
            • (4) Overall Routing of Blade and Adjustable Track Cables
            • (5) Accelerator Lever
            • (6) Accelerator Cable Routing
            • (7) Swing Pedal
            • (8) AUX Pedal
        • 3. TRACK FRAME
          • [1] SWIVEL BEARING ASSEMBLY
          • [2] TRACK FRAME ASSEMBLY
          • [3] TRACK
            • (1) Rubber Track Disassembly/Assembly
          • [4] FRONT IDLER
            • (1) Front Idler Disassembly/Assembly
            • (2) Front Idler Components
          • [5] CYLINDER ASSEMBLY
            • (1) Cylinder Assembly Disassembly/Assembly
            • (2) Cylinder ASSY Components
          • [6] TRACK ROLLER
            • (1) Track Roller Disassembly/Assembly
    • 2 ENGINE
      • GENERAL
        • 1. ENGINE
          • [1] ENGINE SPECIFICATIONS
          • [2] PERFORMANCE CURVE
          • [3] DIMENSIONS
    • 3 HYDRAULIC SYSTEM
      • MECHANISM
        • 1. DIAGRAM OF HYDRAULIC CIRCUIT
          • [1] DIAGRAM OF HYDRAULIC CIRCUIT
        • 2. HYDRAULIC DEVICE LAYOUT
        • 3. PUMP
          • [1] SPECIFICATIONS
          • [2] COMPONENTS
          • [3] FUNCTION AND STRUCTURE
            • (1) Pump Operating Principles
            • (2) Pump Horsepower Control Mechanism
        • 4. CONTROL VALVE
          • [1] SPECIFICATIONS
          • [2] DIAGRAM OF HYDRAULIC CIRCUIT
          • [3] FUNCTION AND STRUCTURE
            • (1) Cross-section of Each Section
            • (2) Straight Travel Circuit
            • (3) Travel Alarm
        • 5. SWIVEL MOTOR
          • [1] SWIVEL MOTOR
            • (1) Specifications
            • (2) Components
            • (3) Function and Structure
        • 6. TRAVEL MOTOR
          • [1] SPECIFICATIONS
          • [2] COMPONENTS
          • [3] FUNCTION AND STRUCTURE
            • (1) Operating Principles
            • (2) Counterbalance
            • (3) 2-Speed Function
            • (4) Auto Deceleration Function
            • (5) Decelerator
        • 7. HYDRAULIC CYLINDER
          • [1] BOOM CYLINDER
            • (1) Specifications
            • (2) Components
            • (3) Function and Structure
          • [2] ARM CYLINDER
            • (1) Specifications
            • (2) Components
          • [3] BUCKET CYLINDER
            • (1) Specifications
            • (2) Components
          • [4] SWING CYLINDER
            • (1) Specifications
            • (2) Components
          • [5] BLADE CYLINDER
            • (1) Specifications
            • (2) Components
          • [6] ADJUSTABLE TRACK CYLINDER
            • (1) Specifications
            • (2) Components
        • 8. PILOT VALVE
          • [1] PILOT VALVE (BOOM, ARM, BUCKET, SWIVEL)
            • (1) Specifications
        • 9. UNLOAD VALVE
          • [1] UNLOAD VALVE
            • (1) Specifications
        • 10. TPSS VALVE
          • [1] TPSS VALVE
            • (1) Specifications
            • (2) Components
      • SERVICING
        • 1. PUMP
          • [1] PUMP DISASSEMBLY/ASSEMBLY
          • [2] PUMP DISASSEMBLY PROCEDURES
            • (1) Disassembly Procedures
            • (2) Assembly Procedures
          • [3] SERVICE STANDARDS FOR PUMP PARTS
        • 2. CONTROL VALVE
          • [1] CONTROL VALVE REMOVAL AND INSTALLATION
          • [2] CONTROL VALVE DISASSEMBLY/ASSEMBLY PROCEDURES
        • 3. SWIVEL MOTOR
          • [1] SWIVEL MOTOR REMOVAL AND INSTALLATION
          • [2] SWIVEL MOTOR DISASSEMBLY/ASSEMBLY PROCEDURES
            • (1) Disassembly Procedures
            • (2) Assembly Procedures
        • 4. SWIVEL JOINT
          • [1] SWIVEL JOINT REMOVAL AND INSTALLATION
        • 5. TRAVEL MOTOR
          • [1] TRAVEL MOTOR REMOVAL AND INSTALLATION
          • [2] TRAVEL MOTOR DISASSEMBLY/ASSEMBLY PROCEDURES
            • (1) Disassembly Procedures
            • (2) Assembly Procedures
        • 6. HYDRAULIC CYLINDER
          • [1] HYDRAULIC CYLINDER DISASSEMBLY/ASSEMBLY PROCEDURES
            • (1) Cylinder Components
            • (2) Disassembly Procedures
            • (3) Assembly Procedures
        • 7. PILOT VALVE
          • [1] PILOT VALVE (CONTROL) DISASSEMBLY/ASSEMBLY PROCEDURES
            • (1) Pilot Valve Components
            • (2) Disassembly Procedures
            • (3) Assembly Procedures
        • 8. UNLOAD VALVE
          • [1] UNLOAD VALVE ASSEMBLY PROCEDURES
        • 9. PRESSURE SENSOR
          • [1] PRESSURE SENSOR ASSEMBLY PROCEDURES
        • 10. ROUTING OF HYDRAULIC HOSES
          • [1] HYDRAULIC HOSE SPECIFICATIONS
            • (1) Total Length of Hydraulic Hose
            • (2) Types of Connector Fittings (Screw)
          • [2] ROUTING OF HYDRAULIC HOSES
            • (1) Delivery Hose Routing
            • (2) Delivery Hose Clamp Positions
            • (3) Suction Hose Routing
            • (4) Front Hose Routing
            • (5) Travel Hose Routing
            • (6) Routing of Swivel, Blade, Swing and Adjustable Track Hoses
            • (7) Track Frame Hose Routing
            • (8) Return Hose Routing
            • (9) Return Hose Clamp Position
            • (10) Pilot Hose Routing
            • (11) Pilot Hose Routing (Control Valve)
            • (12) Entire Pilot Hose Routing
            • (13) Pilot Hose Routing (Around the Driver’s Seat)
            • (14) TPSS Adapter
        • 11. MEASURING THE PERFORMANCE OF HYDRAULIC DEVICES
        • 12. TROUBLESHOOTING
    • 4 ELECTRICAL SYSTEM
      • SERVICING
        • 1. ELECTRONIC EQUIPMENT LAYOUT
        • 2. WIRING CIRCUIT
          • [1] PRECAUTIONS ON HOW TO CLAMP THE ELECTRICAL WIRING
          • [2] PRECAUTIONS ON HANDLING ELECTRICAL CONNECTORS
          • [3] UNPLUGGING ELECTRICAL CONNECTORS AND WIRING LAYOUT
        • 3. TROUBLESHOOTING (START-UP EQUIPMENT VERSION)
        • 4. CHECKS
          • [1] POWER AND GROUND
          • [2] STARTING AND STOPPING DEVICES
        • 5. METER PANEL
          • [1] NAMES AND FUNCTIONS OF METERS AND SWITCHES
          • [2] NORMAL MODE
          • [3] USER SETTINGS MODE
          • [4] SERVICE DEALER MODE
            • (1) Table of Diagnostic / Setting Items
        • 6. TROUBLESHOOTING (METER PANEL)
          • [1] ENGINE RELATED SYSTEM
            • (1) Engine Oil Pressure Error (E:014)
            • (2) Charging System Error (E:016)
            • (3) Fuel Sensor Error (E:017)
            • (4) Water Temperature Sensor Error (E:018)
          • [2] MACHINE RELATED SYSTEM
            • (1) Lever Lock System Error (E:020)
            • (2) Travel 2-Speed System Error (E:021)
          • [3] POWER SUPPLY SYSTEM
            • (1) Over-Voltage (E:025)
            • (2) External 5 V Short Error (E:027)
            • (3) External 12 V Short Error (E:028)
          • [4] COMMUNICATION SYSTEM
            • (1) CAN Communication Error (E:001)
          • [5] TRAVEL ALARM
            • (1) Travel Alarm Error
        • 7. FLOW CHART OF THE NORMAL AND USER SETTINGS MODES
        • 8. SERVICE DEALER MODE FLOW CHART (1/2)
        • 9. SERVICE DEALER MODE FLOW CHART (2/2)
    • 5 CABIN
      • SERVICING
        • 1. CABIN REMOVAL AND MOUNTING
        • 2. HEATER REMOVAL AND INSTALLATION
        • 3. CHECKS
          • [1] HEATER RELATED
            • (1) Blower Switch
            • (2) Blower Motor
          • [2] WINDOW WASHER RELATED
            • (1) Wiper Switch
            • (2) Wiper Motor
            • (3) Washer Motor
          • [3] LIGHTING EQUIPMENT RELATED
        • 4. REMOVAL AND INSTALLATION OF GLASS
          • [1] PREPARATION
          • [2] REMOVING GLASS
          • [3] INSTALLING WINDOWS
          • [4] GLASS TRIM TYPE
        • 5. TROUBLESHOOTING
    • ELECTRICAL WIRING DIAGRAM
    • ELECTRICAL CIRCUIT DIAGRAM

Specification

SpecificationKubota K018-4 Mini Excavator
Engine Model & TypeKubota D902-E4-BH-4EU, 3-cyl, water-cooled diesel, Stage V / Tier 4 Final
Gross / Net Power~15.7 PS / ~15.2 hp (11.8 kW net) @ 2,300 rpm
Displacement898 cc (54.8 cu in)
Operating Weight~1,700 kg (3,748 lb) (canopy: 1,695 kg; cab: 1,720 kg):contentReference[oaicite:0]{index=0}
Maximum Digging Depth~2,380 mm (~7 ft 9.7 in):contentReference[oaicite:1]{index=1}
Auxiliary Hydraulic Flow27 L/min (≈7.1 gpm) @ ~21.6 kgf/cm²:contentReference[oaicite:2]{index=2}
Bucket / Arm Breakout ForceBucket: ~15.9 kN (1,620 kgf); Arm: ~8.3 kN (840 kgf):contentReference[oaicite:3]{index=3}
Maximum Travel Speed2.2 km/h (Low) / 4.0 km/h (High) (~1.4 / ~2.5 mph):contentReference[oaicite:4]{index=4}
Dimensions (L × W × H)Length: ~3,710 mm (~12 ft 2 in)
Width: 990–1,300 mm adjustable (39–51 in):contentReference[oaicite:5]{index=5}
Height: ~2,330–2,350 mm (~7 ft 8 in):contentReference[oaicite:6]{index=6}
Variable Track Gauge990 mm (narrow) to 1,300 mm (wide) via quick-adjust lever:contentReference[oaicite:7]{index=7}
Safety StructuresROPS, TOPS, OPG Level 1 certified:contentReference[oaicite:8]{index=8}

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