Kubota KX101-3α4 Workshop Manual — RY911-24691

About this manual

Kubota published this Workshop Manual for the KX101-3α4 excavator models. It brings the documented service and technical-reference material for those named excavators into a single publication.

The manual is especially useful for work that crosses electrical and hydraulic systems: it includes electrical troubleshooting, alongside hydraulic diagrams, pressure-test evidence, and valve-adjustment information.

Use the Manual Contents below to check that the exact repair, inspection, or maintenance procedure you need is included in this publication.

Manual details

Manufacturer

Kubota

Manual type

Workshop Manual

Models

KX101-3α4

Document number

RY911-24691

Language

English

Page count

199

Product highlights

Electrical systems

The manual includes wiring diagrams and electrical troubleshooting.

Hydraulic systems

The manual includes hydraulic circuit diagrams, hydraulic pressure-test material, and hydraulic valve-adjustment material.

Specifications and settings

The manual includes reference information for torque specifications, capacities, and pressure specifications.

Special tools

A special-tools section is included.

Maintenance

The manual includes a lubrication chart.

Manual contents

Use these source headings to locate the task or system you need in the PDF.

• CONTENTS — p. 1
• TO THE READER — p. 2
• I INFORMATION — p. 4
  • INFORMATION — p. 5
    • 1. SAFETY FIRST — p. 6
    • 2. IN THE INTEREST OF WORK SAFETY — p. 7
      • [1] WORKING SAFETY WITH THE EQUIPMENT MEANS ALWAYS FOLLOWING THESE INSTRUCTIONS: — p. 7
        • (1) Precautions Before Working on the Machine — p. 7
        • (2) Precautions Before Working on the Equipment — p. 8
    • 3. LABELS DISPLAYED TO PROMOTE WORK SAFETY — p. 11
      • [1] LOCATIONS — p. 11
      • [2] LABEL MAINTENANCE — p. 16
    • 4. MAIN SPECIFICATIONS — p. 17
    • 5. DIMENSIONS — p. 18
• G GENERAL — p. 19
  • GENERAL — p. 20
    • 1. MACHINE INDENTIFICATION — p. 21
    • 2. ENGINE INDENTIFICATION — p. 22
      • [1] MODEL NAME AND SERIAL NUMBER — p. 22
      • [2] E3B ENGINE — p. 24
      • [3] CYLINDER NUMBER — p. 24
    • 3. GENERAL PRECAUTIONS — p. 25
    • 4. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING — p. 29
      • [1] WIRING — p. 29
      • [2] FUSES — p. 31
      • [3] CONNECTOR — p. 31
      • [4] WASHING THE MACHINE WITH A HIGH-PRESSURE WASHER — p. 32
    • 5. TIGHTENING TORQUES — p. 33
      • [1] TORQUES FOR GENERAL USE NUTS AND BOLTS — p. 33
      • [2] TORQUES OF STUD BOLTS — p. 33
      • [3] TORQUE FOR HYDRAULIC HOSE FITTINGS — p. 34
        • (1) Torque for Hydraulic Hose Fittings — p. 34
        • (2) Torques of Lock-Nuts for Elbows with Male Seats and Adapters with O-rings (Straight Threads) — p. 34
      • [4] HOSE CLAMP SCREW TORQUE — p. 35
    • 6. TYPES OF OIL — p. 36
      • [1] TABLE OF OIL AND FLUID CAPACITIES — p. 36
      • [2] RECOMMENDED LUBRICANTS — p. 36
      • [3] CHEKING AND FILLING HYDRAULIC OIL — p. 37
    • 7. MAINTENANCE INTERVALS — p. 38
      • [1] OPERATOR SERVICING — p. 38
      • [2] SERVICNG BY SKILLED PERSONAL OR KUBOTA DEALER — p. 39
• 1 ENGINE — p. 40
  • GENERAL — p. 41
    • 1. ENGINE SPECIFICATIONS — p. 42
    • 2. PERFORMANCE CURVE — p. 43
    • 3. DIMENSIONS — p. 44
    • 4. ENGINE MOUNT — p. 45
      • [1] ENGINE MOUNT STRUCTURAL COMPONENTS — p. 45
• 2 MACHINE BODY — p. 46
  • SERVICING — p. 47
    • 1. FRONT EQUIPMENT — p. 48
      • [1] BUCKET — p. 48
        • (1) Removal and Installation Procedure — p. 48
        • (2) Relative Dimensions of Bucket Installation Joints — p. 49
      • [2] FRONT EQUIPMENT — p. 50
        • (1) Removal and Installation Procedure — p. 50
        • (2) Diagram and List of Front Pins — p. 51
        • (3) List of Front Bushing Dimensions — p. 52
      • [3] BLADE — p. 53
        • (1) Blade Dimensions — p. 53
    • 2. SWIVEL FRAME — p. 54
      • [1] WEIGHT — p. 54
        • (1) Removal and Installation Procedure — p. 54
      • [2] CANOPY — p. 55
        • (1) Removal and Installation Procedure — p. 55
      • [3] FUEL TANK — p. 56
      • [4] HYDRAULIC OIL TANK — p. 57
        • (1) Components — p. 57
    • 3. TRACK FRAME — p. 58
      • [1] RUBBER TRACK — p. 58
        • (1) Removal and Installation Procedure — p. 58
        • (2) Rubber Track Dimensions — p. 59
      • [2] CYLINDER ASSEMBLY — p. 59
        • (1) Removal and Installation Procedure — p. 59
        • (2) Cylinder ASSY Components — p. 59
      • [3] FRONT IDLER — p. 60
        • (1) Removal and Installation Procedure — p. 60
        • (2) Front Idler Components — p. 60
      • [4] TRACK ROLLER AND CARRIER ROLLER — p. 61
        • (1) Removal and Installation Procedure — p. 61
• 3 HYDRAULIC SYSTEM — p. 62
  • MECHANISM — p. 63
    • 1. HYDRAULIC CIRCUIT DIAGRAM — p. 64
    • 2. HYDRAULIC DEVICES LAYOUT — p. 67
    • 3. PUMP — p. 68
      • [1] SPECIFICATIONS — p. 68
    • 4. CONTROL VALVE — p. 71
      • [1] SPECIFICATIONS — p. 71
      • [2] DIAGRAM OF HYDRAULIC CIRCUIT — p. 75
      • [3] VALVE SPOOL SHIFT PERFORMANCE — p. 76
    • 5. SWIVEL MOTOR — p. 77
      • [1] SPECIFICATIONS — p. 77
    • 6. TRAVEL MOTOR — p. 78
      • [1] SPECIFICATIONS — p. 78
    • 7. PILOT CONTROL VALVE (BOOM, ARM, BUCKET, SWIVEL) — p. 79
      • [1] SPECIFICATIONS — p. 79
    • 8. PROPORTIONAL VALVE — p. 81
      • [1] SPECIFICATIONS — p. 81
    • 9. SELECTOR VALVE — p. 84
      • [1] SPECIFICATIONS — p. 84
  • SERVICING — p. 85
    • 1. PISTON PUMP — p. 87
      • [1] REMOVING AND INSTALLING — p. 87
      • [2] DISASSEMBLING — p. 88
      • [3] ASSEMBLING — p. 92
      • [4] ADAPTER INSTALLATION ANGLES — p. 97
      • [5] ASSEMBLING COUPLING — p. 97
    • 2. CONTROL VALVE — p. 98
      • [1] REMOVING AND INSTALLING — p. 98
      • [2] DISASSEMBLING AND ASSEMBLING — p. 100
      • [3] COMPONENTS — p. 101
      • [4] ADAPTER INSTALLATION ANGLES — p. 115
    • 3. TRAVEL MOTOR — p. 117
      • [1] REMOVING AND INSTALLING — p. 117
      • [2] DISASSEMBLING — p. 118
        • (1) Gear Case Disassembling — p. 118
        • (2) Motor Disassembling — p. 121
      • [3] ASSEMBLING — p. 125
        • (1) Gear Case Assembling — p. 125
        • (2) Motor Assembling — p. 129
      • [4] SPECIAL TOOLS — p. 133
      • [5] COMPONENTS — p. 135
    • 4. PILOT CONTROL VALVE — p. 138
      • [1] COMPONENTS — p. 138
      • [2] DISASSEMBLY PROCEDURE — p. 140
      • [3] ASSEMBLY — p. 143
      • [4] SPECIAL TOOLS — p. 147
    • 5. PROPORTIONAL VALVE — p. 148
      • [1] INSTALLING — p. 148
    • 6. UNLOAD VALVE — p. 150
      • [1] ASSEMBLY PROCEDURE — p. 150
    • 7. THIRD LINE VALVE — p. 151
      • [1] INSTALLING — p. 151
    • 8. SELECTOR VALVE — p. 152
      • [1] INSTALLING — p. 152
    • 9. HYDRAULIC HOSES ROUTE — p. 153
      • [1] HYDRAULIC HOSES SPECIFICTIONS — p. 153
      • [2] HIGH PRESSURE HOSES ROUTE — p. 154
      • [3] TRACK FRAME HOSES ROUTE — p. 160
      • [4] LOW PRESSURE HOSES ROUTE — p. 161
      • [5] PILOT HOSE ROUTE — p. 163
    • 10. MEASURING HYDRAULIC DEVICE PERFORMANCE — p. 167
      • [1] PISTON PUMP AIR BLEEDING — p. 167
      • [2] HYDRAULIC SYSTEM PRESSURE RELEASE — p. 168
      • [3] MAIN RELIEF VALVE PRESSURE — p. 168
      • [4] MEASUREING THE FLOW RATE — p. 170
        • (1) Main Pump Flow Measurement — p. 170
        • (2) Actual AUX PQ Value Measurement — p. 171
        • (3) Measuring the AUX Proportional Settings — p. 171
      • [5] MESURING PRESSURE — p. 172
        • (1) Pilot Pressure — p. 172
        • (2) Pilot Secondary Pressure Measuring Procedure — p. 173
        • (3) Overload Relief Valve Pressure Measurement Procedure — p. 174
        • (4) Measurement Equipment — p. 175
        • (5) Unload LS Valve Pressure — p. 176
        • (6) Swivel Relief Valve Pressure — p. 176
        • (7) LS Control Pressure — p. 177
    • 11. HYDRAULIC DEVICE PERFORMANCE STANDARDS — p. 178
      • [1] PISTON PUMP P-Q PERFORMANCE (MEASURED VALUES) — p. 178
      • [2] AUX P-Q PERFORMANCE (MEASURED VALUES) — p. 179
      • [3] RELIEF PRESSURE (MEASURED VALUES) — p. 180
      • [4] SWIVEL PERFORMANCE — p. 180
      • [5] TRAVEL PERFORMANCE — p. 180
      • [6] CYLINDER PERFORMANCE — p. 181
    • 12. TROUBLESHOOTING — p. 182
      • [1] FRONT SYSTEM TROUBLESHOOTING — p. 182
      • [2] TRAVEL SYSTEM TROUBLESHOOTING — p. 184
      • [3] SWIVEL SYSTEM TROUBLESHOOTING — p. 184
• 4 ELECTRICAL SYSTEM — p. 185
  • MECHANISM — p. 186
    • 1. GENERAL — p. 187
      • [1] GENERAL EXPLANATION FOR HI SPEC VERSION — p. 187
      • [2] ELECTRICAL DEVICES LAYOUT — p. 187
      • [3] FUSE — p. 188
      • [4] SLOW BLOW FUSE — p. 188
      • [5] RELAY — p. 189
    • 2. CONTROL SWITCH (CONTROL LEVER) — p. 190
      • [1] SPECIFICATIONS — p. 190
    • 3. CONTROLLER AUX2 — p. 191
      • [1] SPECIFICATIONS — p. 191
    • 4. POTENTIOMETER — p. 192
      • [1] SPECIFICATIONS — p. 192
• ELECTRICAL CIRCUIT DIAGRAM — p. 193
• WIRE HARNESS — p. 194
• ELECTRICAL CIRCUIT DIAGRAM (HI SPEC) — p. 196
• WIRE HARNESS (HI SPEC) — p. 197

Capabilities

The source outline separates mechanism explanations from servicing instructions for Hydraulic System. Use these indexed headings to locate the applicable system in the source PDF, then confirm model-specific notes, specifications, illustrations, and operating conditions at the relevant page before carrying out service work.

Keep the source's safety sequence, prerequisite steps, labels, units, configuration notes, and footnotes with the selected task; do not apply an isolated value outside the conditions stated in the manual.

Technical reference

Reference tables include torque settings and fluid and system capacities for service checks, adjustment work, and specification lookup. Use the values and conditions in the PDF for the applicable model and procedure.

• Service limits and settings: torque settings.
• Fluid reference: fluid and system capacities.

Delivery

This manual is supplied as a digital PDF file and is available for instant download after purchase. No physical media is shipped.

References

Kubota Workshop Manual for Excavator, document code RY911-24691, PDF edition.