Kubota KX080-4S2 Workshop Manual — RY911-27747

Manual Specifications

Publisher

Kubota Corporation

Manufacturer

Kubota

Model covered

KX080-4S2

Equipment type

Excavator

Manual type

Workshop Manual

Document number

RY911-27747

Publication date

January 2024

Language

English

Page count

711 pages

File format

Digital PDF

What This Kubota Workshop Manual Covers

The manual is arranged by machine system and separates mechanism explanations from servicing information. This makes it possible to review how a system operates before locating its inspection, adjustment, troubleshooting, or repair procedure.

• Safety and general workshop instructions: working precautions, safety labels, residual hydraulic pressure release, hydraulic tank vacuuming, refrigerant handling, battery removal, hydraulic-cylinder air bleeding, connector handling, wiring color identification, tightening torques, and special service tools.
• Maintenance: lubricant quantities, recommended lubricants, daily inspection points, and service schedules for 50, 100, 200, 250, 500, 1,000, 1,500, 2,000, 3,000, and 6,000 operating hours, together with annual, two-year, and air-conditioning maintenance.
• Machine body: bucket, arm, boom, blade, swing bracket, counterweight, cabin, lever lock, swivel bearing, rubber and steel tracks, front idler, sprocket, track rollers, carrier rollers, pins, bushings, and shims.
• Engine: engine layout and specifications, performance curves, lubrication, cooling, turbocharger, intake-air, EGR, common-rail, aftertreatment, and DPF regeneration systems.
• Hydraulic system: hydraulic pump, main control valve, swivel and travel motors, hydraulic cylinders, swivel joint, control valves, hydraulic tank, and hose routing.
• Electrical system: component layouts, functional circuit diagrams, meter-panel functions, service dealer mode, tester mode, error history, system settings, and electrical troubleshooting.
• Air conditioning and heater: compressor, evaporator, heater core, blower, expansion valve, thermostat, condenser, receiver, pressure switch, refrigerant testing, and component servicing.
• Appendices and diagrams: service specifications, pump performance information, dealer-mode flow charts, wire-harness information, hydraulic circuit diagram, and the complete electrical circuit diagram.

Machine Body Inspection and Repair

The machine-body chapter includes component dimensions and service specifications for the working equipment and undercarriage. Inspection procedures cover front-attachment horizontal play, swivel-bearing vertical play, and the operating force of the control levers and pedals.

Repair coverage identifies removal and installation work for the bucket, arm, boom, blade, swing bracket, counterweight, cabin, lever lock, swivel bearing, rubber track, and steel track. The undercarriage material also covers the front idler, grease cylinder, tension spring, track rollers, and carrier rollers, including component, disassembly, and assembly information where specified in the manual.

Engine and Emissions Service Information

The engine section covers the Kubota V3307-CR-TE5-BH-1 installation used in this excavator. It includes engine specifications and dimensions, performance curves, lubrication and cooling systems, turbocharger and intake-air systems, EGR, common rail, exhaust aftertreatment, and DPF regeneration control.

Service subjects include engine troubleshooting, compression-pressure and engine-oil-pressure testing, fuel-tank and hose routing, and removal or installation information for the engine, alternator, starter motor, injector, turbocharger, EGR valve, EGR cooler, throttle valve, fuel rail, supply pump, radiator, and DPF muffler.

Hydraulic System Coverage

The hydraulic chapter provides a device layout and descriptions of the load-sensing and pilot-control systems. Pump documentation includes specifications, the hydraulic circuit, piston-pump P-Q performance, pump construction, horsepower control, load-sensing flow control, standby flow, and gain control.

Control-valve information covers specifications, spool-shift performance, hydraulic circuits, relief valves, regeneration, boom lock, and other valve functions. Separate coverage is provided for the swivel motor, travel motor, cylinders, swivel joint, pilot control valve, travel and swing control valves, blade control valve, unload valve, proportional valve, swivel shuttle valve, shockless valve, angle-blade solenoid valve, TPSS valve, and third-line valve.

The servicing material includes hydraulic troubleshooting, system specifications, pressure and performance tests, pump and valve measurements, internal-leakage checks, and repair procedures for major hydraulic components. Hydraulic-hose length, fitting, delivery, front, travel, swing, blade, drain, and pilot routing information is also included.

Electrical Circuits, Settings, and Troubleshooting

The electrical chapter identifies switches, fuses, relays, slow-blow fuses, communication ports, grounding points, and other electrical devices. Functional diagrams are provided for the power supply, accessories, battery charging, engine starting, lever lock, travel-speed shift, AUX operation, work lights, AI system, wiper and washer motors, beacon, and angle-blade circuits.

Meter-panel documentation covers display modes, user settings, hidden settings, service dealer mode, tester mode, error-history reading and clearing, AUX1 and AUX2 adjustment, crane and overload-alarm settings, and additional machine configuration functions.

Troubleshooting topics include engine-oil-pressure warnings, overheating, battery-charging faults, fuel and coolant-temperature sensor errors, CAN communication faults, travel-speed shift problems, AUX1 and AUX2 system errors, angle-system faults, lever-lock errors, 5-volt supply faults, and high hydraulic-oil-temperature warnings.

Air Conditioning and Heater Service

HVAC coverage includes operating descriptions and specifications for the compressor, magnetic clutch, evaporator, heater core, blower, blower resistor, expansion valve, thermostat, servomotor, heater valve, condenser, receiver, and pressure switch.

Service procedures cover refrigerant inspection and pressure measurement, fan-switch and blower-resistor checks, magnetic-clutch air-gap measurement, system vacuuming and charging, hose routing, and removal or installation of the compressor, air-conditioning unit, condenser, and receiver. The required manifold gauge, charging hoses, vacuum equipment, leak tester, and refrigerant equipment are also identified.

Who This Manual Is For

This publication is intended for workshop technicians, repair businesses, fleet maintenance departments, and experienced owners who need KX080-4S2-specific service information. It is a workshop manual rather than an operator’s manual or illustrated parts catalog.

Always follow the safety sequence, units, configuration notes, service limits, and prerequisites printed with the applicable procedure. Do not apply a specification or adjustment value outside the conditions stated in the manual.

Digital PDF Delivery

The Kubota KX080-4S2 Workshop Manual is supplied as a downloadable PDF file. Access is provided digitally after purchase; no printed book, CD, DVD, or other physical media is shipped.