Wibako - Professional Liebherr Machine Service

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Wibako restores your equipment to full operational efficiency

Comprehensive Liebherr Machine Service

When your Liebherr R924 crawler excavator or A914 wheeled excavator suddenly stops working, every hour counts. At Wibako, we perfectly understand that eliminating costly downtime in the construction industry is key to the profitability of your business. Our specialized Liebherr machine service offers immediate technical support, drawing on decades of experience, advanced computer diagnostics, and direct access to our own massive inventory of spare components. We don't operate blindly – we precisely locate the root cause of the fault in hydraulic systems, drivetrains, or power units from the D934 and D936 series, guaranteeing uncompromising reliability and safety for every repair performed.

Experience that eliminates downtime

Professional Remanufacturing of Liebherr Combustion Engines

The internal combustion engine is the heart of every construction machine, which is why at Wibako, Liebherr power unit repairs are handled by a dedicated, elite team of mechanics. Our highly qualified staff has years of experience in complete overhauls and routine servicing of demanding engines from the D934, D936, D946 series, or powerful V8 units such as the D9508 operating in the heaviest machine models. We perfectly understand the specifics of advanced Common Rail injection systems and exhaust gas aftertreatment systems (SCR/DPF) used by this manufacturer. Thanks to this, we precisely diagnose hidden micro-damage, eliminating the problems of power drops, excessive smoking, or increased oil consumption, which helps protect your business from sudden and costly downtime on the construction site.

 

Wibako's guarantee of safety and reliability

Quality Control and Final Dynamo Testing

The final stage of power unit remanufacturing at Wibako is an uncompromising verification process where there is no room for guesswork, and only hard technical parameters matter. Every Liebherr combustion engine – from the popular four-cylinder D934 to the advanced D936 and D946 units – goes directly to our modern engine dynamometer after assembly is complete. It is here, under controlled laboratory conditions, that we conduct rigorous dynamic testing, which allows us to precisely check the tightness of all systems: lubrication, cooling, and fuel. We monitor performance parameters under various loads, simulating the extreme conditions found on a construction site, and meticulously examine RPM stability and performance under conditions close to real operation. Thanks to this advanced diagnostic procedure, we gain 100% certainty that every unit leaving our workshop runs according to factory specifications or exceeds them, minimizing the risk of sudden failures and eliminating the risk of costly machine downtime during subsequent use.

 

How to recognize a malfunction?

Typical Symptoms of Liebherr Engine Issues

Ignoring early warning signals sent by the power unit is the easiest way to a major breakdown and work paralysis on the construction site. Liebherr D934, D936, or D946 series engines, despite their legendary durability, operate under extremely harsh conditions, exposing their components to natural operational wear and tear. A quick response to anomalies in the machine's behavior allows for precise diagnostics at Wibako service before irreversible damage to the engine block or crankshaft assembly occurs.

Below are the key symptoms that strictly qualify your Liebherr machine's engine for immediate service inspection:


Sudden and noticeable drop in machine power: The excavator or loader struggles with previous workloads, responds more slowly to joystick movements, and the engine clearly "suffocates" during a sharp increase in demand for torque under a full bucket.

Unusual color of exhaust emissions: Intense black smoke usually means problems with the Common Rail injection system or the turbocharger; blue smoke signals engine oil burning through worn piston rings or valve stem seals, while white smoke can indicate coolant entering the combustion chamber.


Starting difficulties and rough idling: The engine is hard to start both when cold and after warming up, and after starting, it shows clear RPM fluctuations, vibrations, or knocking, which often heralds worn injectors, a drop in cylinder compression, or a high-pressure pump malfunction.


Excessive engine oil or coolant consumption: The need for regular fluid top-ups between intervals, the presence of oil in the radiator expansion tank, or clear signs of leaks on the engine block.


Low or fluctuating oil pressure on a warm engine: A warning message on the operator's dashboard or a pressure gauge reading indicating a drop in lubrication pressure is a critical symptom, which most often means worn connecting rod/main bearings or oil pump failure, risking immediate engine seizure.


Metallic, concerning noises from inside the engine compartment: Any knocking, metallic clicking, loud timing system operation, or turbine whining that intensifies with increasing engine speed and indicates advanced mechanical wear of moving parts.

Expert remanufacturing of pumps and distributors at Wibako

Qualified Team for Power Hydraulics

The hydraulic system is the circulatory system of every construction machine, which is why at Wibako, Liebherr power hydraulics repairs are handled by a team of highly qualified engineers and hydraulic specialists. We specialize in advanced diagnostics and complete remanufacturing of piston pumps, travel and swing motors, and hydraulic distributors used in models such as Liebherr A904, R914, or the massive crawler machines of the R934 and R944 series. We know to the smallest detail the design specifics of Linde and Rexroth components, which form the technological heart of Liebherr hydrostatic systems. Our team precisely eliminates problems related to drops in operating pressure, slowed arm movement, lack of smoothness, or internal oil leaks, which radically reduces the risk of downtime and restores the machine's maximum digging or lifting power.

 

Computer verification and full-load testing

Advanced Hydraulic Test Bench

The last and most crucial step in the process of remanufacturing hydrostatic systems at Wibako is rigorous quality control carried out on our professional diagnostic stations. We feature one of the country's most modern hydraulic test benches, enabling precise testing and verification of Linde and Rexroth piston pumps, travel motors, and swing motors used in Liebherr A914, R924, or R934 machines. Our test station allows components to be subjected to dynamic loads up to 400 bar, perfectly recreating the extreme conditions experienced during mass excavation, trenching, or working with heavy demolition attachments. During the test, computerized measurement systems monitor key parameters in real time: volumetric efficiency, pressure stability, working medium temperature, and internal leak levels. Thanks to this, we eliminate the risk of installing a faulty component, and you can be confident that your machine's hydraulics have regained 100% efficiency and factory performance characteristics.

 

How to recognize a system failure?

Typical Symptoms of Liebherr Power Hydraulics Issues

Hydraulics in machines like the Liebherr A914, R924, or R944 operate under immense pressure, meaning oil contamination or natural operational wear of friction surfaces quickly leads to a drastic drop in efficiency. Early detection of abnormalities and sending the component to Wibako service allows for precise diagnostics on the test bench and remanufacturing of the pump or distributor before metal shavings contaminate the entire system. Below are the key symptoms that strictly indicate the need for immediate intervention from our team:

Clear slowdown of the machine's operational movements: The excavator or loader performs work cycles much slower than usual, and the arms, bucket, or crawler undercarriage respond with a delay to joystick movements, directly pointing to a drop in the efficiency of the main Linde or Rexroth pump.


Drastic drop in digging force and lifting capacity under load: The machine weakens as it enters the ground or tries to lift a heavy load - the arm stalls, and the relief valves open too early, signaling an inability to generate or maintain the proper working pressure.


Unnatural, noisy operation of the hydraulic pump: Metallic sounds, knocking, or a characteristic whining coming from the area of the piston pump that intensifies under load usually means advanced wear of the rotary group, bearing damage, or dangerous cavitation caused by air in the system.


Rapid and excessive heating of the hydraulic oil: A rapid increase in the temperature of the working medium above the norm is a clear sign of large internal leaks in the pump, travel motor, or distributor spools, where oil escaping under pressure generates huge amounts of heat.


Lack of smoothness and jerking during combined movements: The machine struggles to simultaneously rotate the superstructure and raise the arm; movements become jerky, unstable, and difficult for the operator to control, foreshadowing a control section fault or wear on the pump regulators.


Issues with travel or superstructure rotation: The wheeled or crawler excavator pulls to one side when driving straight, shows a lack of power on one of the travel hydromotors, or the superstructure rotates with difficulty and shows play, indicating damage to the Liebherr swing or travel motor.

 

Fast response from Wibako directly on your construction site

Mobile Liebherr Machine Service

When a breakdown immobilizes your Liebherr A914 wheeled excavator or R924 crawler machine on the construction site, transporting the entire equipment to a stationary workshop means massive logistical costs and unacceptable time loss. At Wibako, we understand that the key to your contract's profitability is the immediate elimination of downtime, which is why we have created an elite, fully autonomous fleet of mobile service vehicles. Our experienced mechanics arrive directly at the breakdown site, equipped with professional diagnostic and measurement tools. This allows us to precisely locate the source of the malfunction in hydraulic systems, drive systems, or Liebherr D934 and D936 engines in field conditions, restoring the machine to full operational readiness without unnecessary delay and guaranteeing uncompromising safety for the work performed. Each technical vehicle in the Wibako mobile service fleet is essentially an advanced mobile workshop prepared for the toughest logistical and technical challenges. Crucially, mobile technicians have direct, priority support from our massive Wibako spare parts warehouse, which eliminates the need to wait for components. Fast shipping or direct transport of the missing part by a service courier ensures that repairs take place in record time, giving you complete confidence, stability, and continuity in executing key investments.

 

Immediate availability and elimination of Liebherr downtime

Giant Spare Parts Warehouse

The foundation of our Liebherr machinery service is a massive, constantly replenished spare parts warehouse, which stands as one of the largest facilities of its kind in Poland. We stock thousands of unique, cataloged items on-site ranging from complete assemblies to minor sealing elements. Whether your Liebherr R924 crawler excavator or L556 wheel loader requires an immediate replacement of an axial piston pump or a small timing system component, our service team retrieves the necessary parts directly from the shelf, reducing repair times to an absolute minimum. We offer immediate availability of key mechanical and hydraulic components from Linde and Rexroth, brands widely used in Liebherr machinery, including complete rotary groups, cylinder blocks, pistons, control plates, drive shafts, and control valves. In the internal combustion engine sector, our warehouse secures a full spectrum of repair parts for the D934, D936, and D946 engine series, featuring brand-new and remanufactured turbochargers, Common Rail injection pumps, injectors, seal kits, as well as crankshafts and bearings. We provide both original Liebherr components and carefully selected, certified OEM replacements of identical durability, giving you budget flexibility while maintaining the highest technical performance. Every ordered part or remanufactured component leaves our warehouse immediately, fast courier shipping or express equipping of our mobile service team guarantees that your machine returns to work without unnecessary delay, backed by a full warranty of stability and reliability.

 

 

 

 

How can I deliver a damaged Liebherr pump or motor to Wibako?

You can bring the component to our headquarters in person or leave it to us. We have our own logistics and will arrange fast pallet shipping by courier directly from your construction site or workshop. After repair and testing on the test bench, we will send the working element back to the indicated address, minimizing machine downtime to the maximum.

Do you use original bearings and pistons for the regeneration of Liebherr D934 and D936 engines?

We use exclusively original Liebherr parts or certified OEM components of identical durability, sourced directly from suppliers for initial factory assembly. All pistons, cylinder liners, rings, and connecting rod bearings undergo rigorous quality control in our technical department before assembly, which allows us to strictly provide a 12 month warranty on the engine.

Do you regenerate final drives and swing drives in Liebherr machines?

Yes. Our team comprehensively repairs planetary travel drives (final drives) and tower swing drives for models such as Liebherr R924 or A914. We replace worn sun gears, planetary gears, carriers, and spherical roller bearings. We seal every drive and fill it with gear oil with a specification complying with Liebherr standards, which eliminates the risk of seizing and locking of wheels or tracks.

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