This is the factory Kubota KX080-3 shop manual in downloadable PDF form, covering the compact excavator built around the V3800DI-E2-BH engine. Across 984 pages it documents the machine body, engine, hydraulic system, electrical system, air conditioner, and the anti-theft security key system, with full servicing specifications, troubleshooting charts, and disassembly and reassembly procedures.With this manual you can diagnose hydraulic stalling under load, chase down a no-start, check maintenance intervals for the engine oil, fuel, air, and hydraulic filters, and work through torque values and clearances the way a Kubota technician would. Bookmarked and searchable, it prints cleanly to any section you need.Owners, independent mechanics, and restorers get the same OEM procedures the dealer uses, keyed to real page numbers so you can go straight to the repair instead of guessing.
What's Inside This Kubota KX080-3 Manual
| System | Pages | Key Topics |
|---|---|---|
| I General | - | A. Body and Engine Identification Marks, B. Safety Precautions for Servicing, Disassembly and Reassembly, C. Important Safety Process and Critical Functional Process |
| Ii. Machine Body | - | New Product Feature (Feature, Quick Chart, Feature Points), Maintenence Components Layout, Rubber Track vs Iron Track, Greasing Intervals |
| Iii. Engine | - | Mechanism Section, Engine (Specifications, Performance Curve, Different Installation From V3800 Basic Model), Service Section, Troubleshooting, Servicing Specifications |
| Iv. Hydraulic System | - | General (Features of the Hydraulic System, Hydraulic Components Layout, Hydraulic Circuit Diagram) |
| V. Electrical System | - | Feature and Main Function (Development Concept, Service Port1 Speed Limit Control, Fuel Supply Pump, Intake Air Heater Control, Boom Cylinder Overload Sensing, Travel Alarm System) |
| Vi. Air Conditioner | - | Air Conditioner System (Introduction of Air Conditioner, Function and Structure), System Components; Kx080-3 (Components and Location, Control Panel, Air Conditioner Unit) |
| Vii Anti-Theft System | - | Outline of Anti-Theft System (Feature of Kubota New Security Key, System Structure, Principle of New Security System), Types and Roles of Keys (Black Key, Red Key) |
| Conversion Tables | - | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Troubleshooting engine stalls at rated rpm when hydraulic load is imposed | 1) The control pin has got stuck: Eliminate the cause of the stick completely or replace the pin assembly. 2) There is a control pressure leak due to wear in the control pin (large diameter pin): If the control pressure leak is caused by wear, replace the pump assembly. 3) The control spool of the horsepower control valve has got stuck: If the horsepower control valve is set improperly, reset it. 4) The horsepower control valve is set improperly: For the resetting of the horsepower control valve, refer to the P-Q characteristic diagram. | p. 458 |
| Hydraulic return filter element replacement interval | Every 500 hrs | p. 24 |
| Hydraulic suction filter element replacement interval | Every 1000 hrs | p. 24 |
| Engine oil filter cartridge replacement interval | Every 250 hrs | p. 24 |
| Drive unit oil type | SAE 90 (API, CLA/GL5) | p. 27 |
| Gear oil quantity (travel motor) | 1.3 liters | p. 616 |
| Fuel filter cartridge replacement interval | Every 500 hours | p. 24 |
| Battery type (JIS) | 130E41R | p. 120 |
| Nominal Capacity of 5 hrs rating (Battery) | 92 Ah | p. 120 |
| Starter motor power | 12V 2.7kW | p. 120 |
| Air filter element cleaning interval | Every 200 hrs | p. 24 |
Kubota KX080-3 Common Problems This Manual Covers
Hydraulics stall the engine under load
Owners report the engine bogging or stalling the moment a hydraulic function is engaged, often from a stuck control pin, a control pressure leak, or a mis-set horsepower control valve. The manual walks through the diagnosis and the P-Q characteristic reset.
Manual Section: IV. Hydraulic system p. 291Boom hydraulic power loss
A common complaint is losing power to the boom while other functions still work normally, usually traced to restricted flow, a clogged strainer, or worn seals and O-rings. The hydraulic section covers component layout, the circuit diagram, and seal replacement rules.
Manual Section: IV. Hydraulic system p. 291Engine cranks but will not start
A frequent no-start cause is fuel delivery: air in the fuel system, plugged filters, or a weak feed to the injection pump. The engine troubleshooting and servicing specifications help confirm compression, injection nozzle pressure, and oil pressure before you tear anything down.
Manual Section: III. Engine p. 117Turbo damage after improper shutdown
Skipping the cooldown or idling incorrectly can starve the turbocharger of oil and cause premature wear or noise. The engine section documents the correct servicing procedures and specifications to keep oil supply and return flow within spec.
Manual Section: III. Engine p. 117No-start from battery or starter
Weak batteries, corroded connections, and starter faults are common no-crank causes on high-hour machines. The electrical section covers the charging and starting circuit, so you can check battery voltage and starter output against the listed values.
Manual Section: V. Electrical system p. 715Security key not recognized
The KX080-3 uses Kubota's anti-theft security key system with black and red keys, and a lost or unregistered key can leave the machine immobilized. The anti-theft section explains the system structure and the roles of each key type.
Manual Section: VII Anti-theft System p. 935Frequently Asked Questions
Which machine and engine does this KX080-3 manual cover?
It covers the Kubota KX080-3 compact excavator with the V3800DI-E2-BH engine. Content spans the machine body, engine, hydraulic system, electrical system, air conditioner, and anti-theft system, with specifications, troubleshooting, and disassembly and reassembly procedures across all 984 pages.
Does it explain why the excavator stalls under hydraulic load?
Yes. The Hydraulic system section gives the full troubleshooting for the engine stalling at rated rpm when load is applied, covering a stuck control pin, a control pressure leak from wear, and resetting the horsepower control valve using the P-Q characteristic diagram. p. 291
Can I use it to diagnose a no-start?
Yes. The Engine section includes troubleshooting and servicing specifications, so you can check compression pressure, injection nozzle pressure, and oil pressure, and work through fuel system and cranking issues methodically instead of guessing at the cause. p. 117
How do I get the manual after buying?
You download the PDF instantly after purchase. There is no waiting for shipping, and you can save it to a computer, tablet, or phone and keep it in the shop for reference whenever you service the machine.
What do I get after purchasing this Kubota KX080-3 manual?
This is a 984-page searchable PDF ready for immediate download. It works on any device, so pull it up on your phone right at the machine. No shipping, no waiting.
Can I print this Kubota KX080-3 manual?
None at all. The PDF is DRM-free, so print whatever sections you need for the shop. Standard letter or A4 paper works.
Are electrical wiring diagrams included in this Kubota KX080-3 Service Manual?
Yes, this Kubota KX080-3 Service Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
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