Service and repair of Kubota machinery

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Professional service for Kubota construction machinery

Wibako's authorized technical facilities provide comprehensive service, diagnostics, and repair of Kubota construction equipment, in particular KX and U series mini excavators, RT wheel loaders, and SVL compact track loaders. We eliminate costly downtime on the construction site by offering lightning-fast verification of hydraulic system faults, remanufacturing of swing pumps, and complete overhauls of Kubota V and D series diesel engines. With an advanced machine park, our own testing station for heavy hydraulics, and a massive warehouse of replacement components, we guarantee to restore your machine to full operational efficiency in the shortest possible time. The specialized knowledge of our engineers allows us to perform precise calibrations of control systems and repairs of drive axles, which directly translates into the safety of the service purchase and long-term reliability of the equipment in the toughest ground conditions. We do not work blindly – every Kubota KX019-4 or U27-4 mini excavator entering the Wibako workshop undergoes rigorous pressure and performance tests, giving you the certainty that the post-repair operating parameters match the manufacturer's technical specifications 100%. We understand that in the construction industry time is money, which is why our logistical background ensures immediate access to seals, filters, and undercarriage components, minimizing the period the machine is out of service. By choosing Wibako service, you choose uncompromising quality backed by years of practice in heavy equipment remanufacturing.

Partnership with Motorservice and Bosch

Kubota parts warehouse

Our massive, stationary Wibako spare parts warehouse guarantees immediate availability and express shipping of components for Kubota machinery and engines, allowing us to reduce your equipment's downtime on the construction site to an absolute minimum. We build our authority and reliability on strategic partnerships with global leaders in the automotive and industrial markets, being an official partner of the Motorservice and Bosch brands. Thanks to direct cooperation with the Motorservice group, we provide top-class, original Kolbenschmidt engine components, such as precisely manufactured pistons, piston rings, cylinder liners, rod and main bearings, and gasket sets, which guarantee factory durability and a perfect fit in Kubota V2403 or V3307 power units. In turn, our partnership with Bosch enables us to have lightning-fast access to technologically advanced, original Common Rail injection system components, including high-pressure injection pumps, precise injectors, and fuel pressure sensors, which are crucial for maintaining strict Stage V emission standards in modern construction machinery. Having such a powerful warehouse facility combined with direct distribution channels from Motorservice and Bosch means we are not just a middleman – we are an independent leader that physically holds the offered parts on our own shelves. This provides our customers with uncompromising purchase security, the certainty of receiving a 100% original and certified product, and the fastest possible logistics, ensuring that a remanufactured Kubota engine or hydraulic pump returns to work without unnecessary loss of valuable working hours.

 

 

Machine repair nationwide

Mobile service for Kubota machinery

Our fully equipped Wibako mobile service ensures lightning-fast travel directly to the construction site, offering professional computer diagnostics and express repairs of Kubota KX, U, and SVL series machines across the entire country. Our mobile mechanics have advanced service vehicles at their disposal, which constitute complete, independent field workshops equipped with precise flow meters for heavy hydraulics diagnostics, specialized equipment for crimping hydraulic hoses, power generators, and professional diagnostic testers dedicated to engine controllers and Common Rail systems in Kubota machinery. Thanks to such an advanced technical background, we are able to precisely locate the cause of pressure drops in the hydrostatic system right at the scene of the fault, resolve control electronics failures, replace damaged arm cylinder seals, and perform calibration of hydraulic pumps and sectional directional control valves. We act decisively and efficiently, carrying the most frequently rotating spare parts, filters, and oils dedicated to specific models, such as the Kubota KX027-4 or U35-4, in our vehicles, which allows us to eliminate most typical drive or fuel system failures during a single visit. By choosing Wibako mobile service, you gain peace of mind that the repair of your mini excavator will be carried out to the highest technical standards, and your machine will return to work in the shortest possible time, without generating unnecessary logistical costs.

 

Comprehensive Kubota engine overhauls

Kubota internal combustion engine service

Our specialized team of mechanics performs general overhauls and precise diagnostics of Kubota industrial internal combustion engines, including the popular three-cylinder units from the D series (such as D1105 or D1703) and the more powerful, four-cylinder engines from the V series (including V2403, V2607, and V3307-CR-T with Common Rail system). We eliminate the problems of power drops, excessive smoking, or starting difficulties, guaranteeing the trouble-free operation of power units in your mini excavators, loaders, and generators. Our specialists' many years of experience in working with demanding Stage V emission standards allow us to successfully remanufacture injection systems, clean DPF particulate filters, and diagnose EGR valves. Every engine after a major overhaul goes to our proprietary test stand, where it is subjected to load tests simulating real working conditions on a construction site, which gives you absolute purchase security and the certainty that the unit will maintain nominal compression and lubrication pressure parameters. Thanks to direct access to our giant warehouse, where we store pistons, rings, head gaskets, as well as water pumps and injectors for Kubota engines, we shorten the repair time to an absolute minimum, effectively protecting your business against losses caused by equipment downtime.

 

Safety guarantee

Professional load tests on an engine dynamometer

Our advanced engine dynamometer at the Wibako service center allows for precise load and diagnostic testing of Kubota V and D series engines, including V3800-CR-TE4 or D1803-CR-T units, directly after a complete overhaul. We eliminate the risk of installing an untested unit into a machine, giving you 100% certainty that the engine generates nominal torque, correct boost pressure, and optimal oil pressure and operating temperature parameters. Every Kubota diesel engine that leaves our remanufacturing workshop passes through a rigorous, multi-stage test cycle on the dynamometer, where we simulate the real working loads that the machine must face during excavation or when operating with heavy hydraulic attachments. Thanks to advanced measuring equipment and precise flow and temperature sensors, our mechanics can closely monitor the operation of the Common Rail injection system, the emission level, and the tightness of the entire engine block under full load.

 

Qualified team of heavy hydraulics mechanics

Service and remanufacturing of Kubota heavy hydraulics

Our dedicated Wibako heavy hydraulics department offers specialized diagnostics, repair, and remanufacturing of main piston pumps, travel motors, and hydraulic control valves used in Kubota construction machinery. We eliminate problems related to sudden drops in operating pressure, slowed operation of the mini excavator arm, hydraulic oil leaks, and lack of traction power in final drives. Thanks to many years of practice, our hydraulic specialists accurately diagnose faults in components from renowned manufacturers such as Kayaba (KYB), Nachi, or Rexroth, which are factory equipment of hydraulic systems in Kubota KX057-4, U56-5 machines, and wheel loaders. We have modern workshop stations enabling precise lapping of valve plates, replacement of pistons, remanufacturing of drive shafts, and replacement of complete seals and displacement regulators. The key to the reliability of our services is that every remanufactured hydraulic pump or travel motor goes to our specialized hydraulic test station before being reinstalled in the machine. At this advanced diagnostic stand, we subject components to dynamic tests under full operating pressure, which allows us to accurately measure internal flows, operating temperature, and verify system tightness under maximum load. We ensure full security of the service purchase, eliminating the risk of delivering a defective element, which allows you to immediately restore the factory dynamics and precision of your machine's working movements. Our huge logistical base guarantees constant access to original spare parts and high-quality alternative components, thanks to which the process of remanufacturing and shipping the finished component takes place at an express pace, effectively minimizing equipment downtime on the construction site.

 

 

How to recognize a Kubota engine failure?

Key symptoms of engine failure

Quick recognition of the first symptoms of abnormal operation of the Kubota diesel engine in your KX027-4 mini excavator or RT280 loader allows for an immediate response and eliminates the risk of complete engine seizure. Ignoring minor anomalies in the operation of the crank-piston system or the Common Rail injection system in engines such as Kubota V2403 or D1105 drastically increases the costs of subsequent repairs and leads to long-term machine downtime on the construction site. Below is a set of the most characteristic symptoms that clearly indicate the need for specialized workshop diagnostics:


Power drop and lack of throttle response under load – the machine visibly weakens during digging or driving uphill, which most often heralds wear of the injection pump pumping sections, worn injectors, or loss of compression on the cylinders of D and V series engines.


Unusual exhaust gas color (smoking) – black smoke from the exhaust usually means turbocharger failure, an EGR valve fault, or a malfunctioning injection system delivering too rich a mixture; blue smoke signals engine oil burning through worn valve stem seals or piston rings; white smoke, in turn, is a symptom of coolant entering the combustion chamber, which directly indicates damage to the head gasket.


Difficulties starting a cold or warm engine – problems with starting a three-cylinder unit (e.g. Kubota D902) or a four-cylinder unit usually result from a drop in compression pressure, worn glow plugs, or incorrect pressure in the Common Rail fuel rail.


Metallic knocks, ticking, and loud operation – any unusual sounds coming from inside the engine block may indicate excessive clearance on the rod bearings, worn piston pins, or damage to the timing gear system, which, in the absence of an immediate reaction, threatens to break the connecting rod and destroy the Kubota engine block.


Loss of engine oil or coolant and oil level "rising" – a sudden drop in the level of operating fluids indicates internal or external leaks, while an increase in the oil level is the result of fuel getting into the oil pan, caused, among other things, by a malfunction of the DPF filter regeneration system.

 

Qualified team of power hydraulics mechanics

Symptoms of hydraulic failure in a Kubota machine

Quickly identifying the first signs of a drop in hydraulic system performance in your Kubota KX019-4 or U27-4 mini-excavator, or SVL compact track loader, prevents a complete machine breakdown and drastically reduces repair costs. Below are the most common symptoms of a malfunction that require immediate action:

Significant slowdown of working movements after the oil warms up – when a cold mini-excavator operates correctly, but after a dozen or so minutes the boom lowers slowly and lacks power, this usually indicates wear of the pistons or port plate in the main pump and a drastic drop in its volumetric efficiency.

Lack of traction and steering issues (weak travel) – if your Kubota machine struggles to climb slopes, drifts to one side when driving straight, or lacks the power to turn the tracks in heavy terrain, the culprit is usually worn swivel joint (rotary manifold) seals, or worn-out travel motors and final drives.

Unnatural, loud operation, whining, or metallic sounds – metallic noises coming from the area of the hydraulic pump are a direct sign of a lack of proper lubrication, air in the system, worn drive shaft bearings, or mechanical damage to the pump's rotating components.

Uncontrolled drifting/dropping of the boom or attachment (e.g., bucket) – a lack of working position stability and slow dropping of the arm under its own weight is a classic symptom of internal leakage in the hydraulic control valve, worn relief valves, or damaged piston/rod seals in the hydraulic cylinders.

Rapid rise in hydraulic oil temperature – excessive heating of the entire system is usually caused by the pump operating at its limit, a clogged oil cooler, or continuous oil bypassing through damaged relief/safety valves, which drastically accelerates the wear of all sealing components.

 

 

 

 

 

 

Will I receive a warranty for the services performed after an engine or hydraulic repair at Wibako?

Yes, we provide a full warranty on every remanufacturing service for Kubota internal combustion engines and power hydraulic components, ensuring unconditional purchasing security for you.

Does the Wibako service center use original Kubota spare parts or cheaper replacements?

At Wibako, we adapt flexibly to our customers' budgets and preferences, but we never compromise on the durability and reliability of the power units or hydraulic systems.

Does your mobile service for Kubota machines travel to breakdowns across Poland?

Yes, our Wibako mobile service has fully equipped service vehicles that are ready to intervene on construction sites nationwide.

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