Need the factory specs for your KX080-3? This 984-page Kubota KX080-3 service manual PDF (OEM #97899-61730) is the official shop manual for the whole excavator: machine body, V3800 engine, hydraulic system, electrical circuits, A/C, and anti-theft system. The hydraulics section maps the full LS-system fluid routing alongside the electrical wiring diagram and system diagrams covering KICS failure diagnosis and service-mode flow charts. Diagnostics lean on torque specification tables, exploded-view drawings, and troubleshooting sections, including the step-by-step horsepower control valve reset. Maintenance intervals are spelled out too: hydraulic return filter at 500 hours, suction filter (105μm, 150 mesh) at 1,000 hours, engine oil filter every 250 hours. Bookmarked throughout, so you find the page and get back to digging.
What's Inside This Kubota KX080-3 Manual
| System | Pages | Key Topics |
|---|---|---|
| I General | 5-28 | 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 | 29-116 | New Product Feature (Feature, Quick Chart, Feature Points), Maintenence Components Layout, Rubber Track Vs Iron Track, Greasing Intervals |
| III. Engine | 117-290 | Mechanism Section, Engine (Specifications, Performance Curve, Different Installation from V3800 Basic Model), Service Section, Troubleshooting, Servicing Specifications |
| IV. Hydraulic system | 291-714 | General (Features Of The Hydraulic System, Hydraulic Components Layout, Hydraulic Circuit Diagram) |
| V. Electrical system | 715-884 | 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 | 885-934 | 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 | 935-980 | 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 | 981-984 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| General tightening torque information | Refer to pages I-14 to I-17 for general tightening torques for bolts, nuts, hose screws, joint bodies, hose clamps, and nuts for piping. Refer to pages III-S-100 to III-S-102 for engine-specific tightening torques. | p. 18 |
| 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
Kubota KX080-3 engine cranks but will not start, no fuel reaching injectors
Start at the fuel level, then bleed air from the fuel system. A plugged fuel filter is the next suspect; replace it every 500 hours per the maintenance schedule on page 24. Battery voltage must read more than 12 V, with specific gravity at 1.260 Sp. Gr. when fully charged (page 172). If the starter engages weakly, test the 12V 2.7kW starter motor and check every cable connection for corrosion before condemning the unit.
Manual Section: Engine Troubleshooting: No Start / Starter IssuesBoom loses hydraulic power under load while other functions remain normal
Pull the suction strainer and inspect it first. Rated at 105μm (150 mesh) on page 447, a partial blockage starves the pump without tripping a full system failure. Swap the hydraulic return filter every 500 hours and the suction filter every 1,000 hours. Torque the return filter cartridge to 35-40 N·m on reinstall (page 448). If boom weakness persists, consult the hydraulic troubleshooting charts to check pump output and control valve function.
Manual Section: Hydraulic System Troubleshooting: Abnormal Speed / Power WeaknessEngine stalls or lugs down the moment a hydraulic function is engaged
Follow the four-cause sequence on page 458: check whether the control pin is sticking, inspect for pressure leaks around the large-diameter control pin caused by wear, verify the horsepower control valve spool has not seized, and confirm the valve is set correctly against the P-Q characteristic diagram. A stuck or worn control pin is the usual culprit, so eliminate the binding source completely or replace the pin assembly rather than just cleaning it.
Manual Section: Hydraulic System Troubleshooting: LS Control / Pump / Control Valve IssuesTurbocharger noise or smoke after high-load operation and sudden shutdown
Idle the engine through a full cool-down period after heavy use before shutting it down. Engine oil pressure at idle must read at least 49 kPa (page 222); anything lower starves the turbo bearings during heat soak. Inspect the oil supply and return lines to the turbocharger for restrictions or kinks. If bearing noise persists, work the troubleshooting charts to rule out oil pressure faults before disassembling the turbo assembly.
Manual Section: Engine Troubleshooting: Performance / Oil IssuesFinal drive makes grinding noise and oil level is low at service interval p. 616
Drain and refill each final drive with SAE 90 (API GL5) gear oil; capacity is 1.3 liters per side (page 616). Torque the drain and filler plugs to 58.8±9.8 N·m (page 617). Inspect the rubber crawler and sprocket teeth for accelerated wear, a sign the drive has been running low for a while. Log the interval: final drive oil changes are tracked on the maintenance schedule starting on page 22.
Manual Section: Hydraulic System Troubleshooting: Travel Motor / Pilot Valve IssuesBattery warning light on, machine sluggish to start after sitting overnight
Test battery voltage with a multimeter: anything below 12 V (page 235) means it is not holding charge. Read specific gravity with a hydrometer, where a fully charged 130E41R battery shows 1.260 Sp. Gr. (page 172). Inspect the alternator output and every ground strap for corrosion. Rule out parasitic draw from the anti-theft or AI system using the electrical troubleshooting procedures before replacing the 92 Ah battery.
Manual Section: Electrical System Troubleshooting: Starter / Auto Release / AI System FailureFrequently Asked Questions
How do I reset the service reminder on a Kubota KX080-3?
On the KX080-3, the service reminder clears itself after 10 seconds. To wipe it manually in manual mode, hold the working lamp for 3 seconds. Checking or changing the service hour meter runs through the meter panel menu: Diagnosis -> Set up -> Other menu -> Other menu -> Service hour meter, then the switch increments or fixes each number.
Where can I find the Kubota KX080-3 error codes and what do they mean?
Two tables carry the codes. The "Service mode menu list" on page 813 gives display indications and explanations for each condition (for example, data003 for fuel amount shortage, data004 for low engine oil pressure). The "Failure diagnosis" table on page 838 goes deeper, pairing failure symptoms (such as "1 Fuel", "2 Engine oil") with their display messages, buzzer/lamp signals, reset methods, and diagnostic steps. Page 843 then lists the "EEPROM Addresses for Error Log" and what each failure type stores in the EEPROM.
What are the torque specs for the Kubota KX080-3 undercarriage and swing bearing?
Three figures cover the undercarriage and swing bearing. The swivel bearing torques to 259.5~304.0 N·m (26.5~31.0 kgf·m, 191.4~224.2 ft·lbs). Upper roller bolts take 77.5~90.2 N·m (7.9~9.2 kgf·m, 57.2~66.5 ft·lbs). Track roller bolts call for 166.7~196.1 N·m (17.0~20.0 kgf·m, 123.0~144.6 ft·lbs).
How do I clear fault codes on a Kubota KX080-3?
To clear fault codes on the KX080-3, open "Diagnosis Mode" and pick "Delete record" from the menu. The display reads "Fail record deleted" to confirm. For a deeper wipe, EEPROM addresses 65 through 103 can be zero cleared with a PC before shipping.
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.
Document Quality
This document is a scanned PDF with an optical character recognition (OCR) layer, allowing you to search and copy the full text. The text throughout is crisp and consistently easy to read, with no blurry or faded sections. Diagrams and illustrations are primarily raster images or photos, but they are clear, and all labels are readable. Pages are generally clean with no significant scan artifacts, stains, or skewed content, though some pages are intentionally blank as section dividers.
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