> Liebherr machine service and excavator repair: hydraulics, engine overhauls with dyno testing, mobile service across Poland. Independent WIBAKO since 1989.

## Excavator Service Liebherr

## Wheel loader Service Liebherr

## Bulldozer Service Liebherr

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# Service and Repair of Liebherr Machines

![Liebherr long-reach excavator being serviced on site next to a WIBAKO service van, drone view](https://wibako.com/media/articles/article-430/slot1-e-a6b8035c.webp)

WIBAKO is the longest-established independent **Liebherr machine service** in Poland. We have been in business since 1989, more than 35 years. We repair Liebherr excavators, wheel loaders, dozers, cranes and material handlers. We provide complete **Liebherr excavator service**: from on-site fault diagnosis, through hydraulic pump and motor rebuilds, to full combustion engine overhauls with dynamometer testing. As a **Liebherr construction machinery service** provider, we combine our workshop in Kojszówka, mobile service crews and a parts warehouse, which significantly reduces machine downtime.

Our teams focus on the three areas where major failures most often occur in Liebherr machines: hydraulic power systems, diesel engines and drivetrains (axles, final drives, swing gearboxes).

## Liebherr service by machine type

![Liebherr material handler with grapple at a timber yard and WIBAKO service vans](https://wibako.com/media/articles/article-430/slot2-e-fa791290.webp)

### Wheeled and crawler excavators

We service A-series wheeled excavators (including A904, A914, A918, A924) and R-series crawler excavators (including R914, R924, R934, R944). The most common repairs are main pumps and swing motors, slewing rings, boom and bucket pins (line boring and bushing) and D924, D926 and D934 engines. Details can be found on our [Liebherr excavator service and repair](https://wibako.com/about-us/service/718-repair-and-service-of-liebherr-excavators) page.

### Wheel loaders

We repair L506, L550, L556, L566, L580 and L586 wheel loaders: working hydraulics, hydrostatic drive, axles and engines. In loaders with hydrostatic drive, a loss of tractive force is often caused by a worn travel pump or hydraulic motor rather than a diesel engine fault. Read more on our [Liebherr wheel loader repair](https://wibako.com/about-us/service/719-repair-and-service-of-liebherr-loaders) page.

### Cranes

We service LTM mobile cranes, LR crawler cranes and HS machines. The scope covers carrier and superstructure engines (D924, D926, D9406, D9408, D9508), fault code diagnostics and hydraulic systems. See: [Liebherr crane service](https://wibako.com/about-us/service/720-repair-and-service-of-liebherr-cranes).

### Dozers and material handlers

We repair PR724, PR734, PR754 and PR756 dozers as well as LH material handlers working in scrapyards, sawmills and ports. Typical problems in these machines include overheating during continuous heavy-duty operation, travel drive wear and faults in the rotator and grapple slewing.

## Liebherr hydraulics – pumps, hydraulic motors, control valves

![Mechanic removing the cylinder block with pistons from an axial piston pump during a rebuild](https://wibako.com/media/articles/article-430/slot3-e-6f2777e8.webp)

Liebherr hydraulic pumps are among the components we rebuild most often. We rebuild LPVD, LPV, DPVO and DPVD axial piston pumps and FMV hydraulic motors. After stripping the pump, we measure piston clearances in the cylinder block and inspect the valve plate, slippers, swashplate, bearings and regulator. Worn parts are replaced with new genuine parts or proven aftermarket equivalents. The assembled pump is tested on a test bench up to 400 bar: we check flow, pressures, leakage and regulator characteristics. An example of such a repair: [rebuild of a DPVO 165 pump from a Liebherr A316 excavator](https://wibako.com/about-us/news/817-how-often-should-excavator-pumps-be-serviced-rebuilding-a-dpvo-165-from-a-liebherr-a316).

Hydraulic service scope:

- main pumps, travel pumps and gear pilot pumps,
- hydraulic travel and swing motors,
- control valves and valves (pressure adjustment and verification),
- cylinders: seals, guides, piston rods,
- filtration and system flushing after a failure.

Symptoms that call for diagnostics:

- loss of digging or lifting force, especially once the oil has warmed up,
- slow attachment movements or uneven travel,
- hydraulic oil overheating,
- whining or noisy pump operation,
- metal particles on filters and magnetic plugs,
- boom drifting down on its own.

Practical tip: after a pump failure, metal particles circulate in the oil. Without filtration and flushing of the system, a new or rebuilt pump can seize quickly, so we check oil cleanliness every time we replace a pump.

## Liebherr engine overhauls with dyno testing

![Liebherr D936 A7 diesel engine](https://wibako.com/media/articles/article-430/slot4-p-c0f52b74.webp)

We overhaul Liebherr inline and V engines, from older mechanical units to Common Rail versions with SCR and DPF exhaust aftertreatment. The overhaul includes inspection of the block, liners, crankshaft and cylinder heads, as well as rebuilding of ancillaries: turbochargers, water pumps and the CR injection system. Every overhauled engine is tested under full load on our own dynamometer rated up to 500 hp. This way any faults show up in the workshop, not on the job site.

Typical signs of engine wear:

- black smoke (fuel, boost), white smoke (coolant, injection) or blue smoke (oil),
- loss of power and increased fuel consumption,
- low oil pressure on a warm engine,
- knocking, metallic noises, crankcase blow-by.

If an overhaul would take too long, an exchange engine is the solution: a tested used unit or a rebuilt one, e.g. the [Liebherr D934 L A6 engine](https://wibako.com/shop/diesel-engines/11218X73323-engine-liebherr-d934-l-a6). The machine goes straight back to work, and the worn engine can be rebuilt later.

## Mobile Liebherr machine service across Poland

![Drone view of a crawler excavator being serviced on site next to two WIBAKO service vans](https://wibako.com/media/articles/article-430/slot5-e-54adf0a5.webp)

Transporting a heavy excavator or crane to a workshop is costly and time-consuming. That is why our fully equipped service vans travel to customers all over the country, including Warsaw and the Mazovia region. On site, our mechanics carry out:

- computer diagnostics and fault code reading,
- scheduled inspections and maintenance,
- oil changes and mobile oil filtration,
- component repair and replacement,
- removal and installation of diesel engines and hydraulic pumps,
- line boring and bushing of booms and buckets.

Pricing:

- labour rate: PLN 230 net per mechanic per hour,
- labour rate when installing parts purchased from WIBAKO: PLN 190 net,
- travel: PLN 3 net per km, both ways,
- scheduled inspection: PLN 1,400 net, excluding travel and materials.

## Spare parts and warehouse

![Liebherr engine available in the WIBAKO parts warehouse](https://wibako.com/media/articles/article-430/slot6-p-fe71f50a.webp)

We run one of the largest construction machinery parts warehouses in Poland. We have more than 50 diesel engines and over 200 pumps in stock, as well as axles and final drives. We offer new genuine parts, aftermarket parts and used parts from dismantled machines, tested before sale. You will find our full range on the [Liebherr engine parts](https://wibako.com/about-us/blog/583-parts-for-liebherr-engines) page.

Thanks to our warehouse, we do not wait weeks for a missing part during an overhaul. Please include the machine and engine serial numbers in your enquiry, as this speeds up parts selection.

## Why choose WIBAKO for Liebherr service

- **Experience**: more than 35 years of working on Liebherr machines.
- **In-house test facilities**: a dynamometer up to 500 hp and a hydraulic test bench up to 400 bar.
- **Parts warehouse**: shorter downtime thanks to components available off the shelf.
- **Complete service**: excavators, loaders, cranes, dozers and material handlers, covering all key systems.
- **Mobility**: on-site service throughout Poland.

Describe the symptoms and give us the machine model, and we will propose a diagnostic scope and repair plan.

### Book a Liebherr service

Contact us today – we provide fast diagnosis, professional repairs and full service support for Liebherr machines. Liebherr excavator service, Liebherr wheel loader service, Liebherr dozer service – WIBAKO.

[+48 33 870 42 00](tel:+48338704200) [biuro@wibako.pl](mailto:biuro@wibako.pl) [Formularz](https://wibako.com/contact)

## Frequently asked questions

### Do you repair Liebherr excavators on site?

Yes. Our mobile service travels to the job site or the customer's yard and carries out diagnostics, inspections, oil changes and filtration, component replacement, and removal and installation of engines and hydraulic pumps on site. Major component overhauls are carried out in our workshop in Kojszówka.

### Do you provide Liebherr service in Warsaw and other regions of Poland?

Yes, our mobile service covers customers throughout Poland. Travel is charged at PLN 3 net per kilometre, both ways.

### How long does a Liebherr hydraulic pump rebuild take?

It depends on the degree of wear and the availability of parts such as the cylinder block, valve plate or regulator components. We give a lead time once the pump has been stripped and inspected. If the machine cannot stand idle, ask about a pump from our stock.

### Is an overhauled Liebherr engine tested before installation?

Yes. Overhauled engines are tested under full load on our own dynamometer rated up to 500 hp. We check power output, oil pressure, temperatures and tightness.

### How is on-site Liebherr machine service charged?

We charge labour hours: PLN 230 net per mechanic, plus travel (PLN 3 net/km both ways) and materials. A scheduled inspection costs PLN 1,400 net, excluding travel and materials.

Published: 2025-09-26

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Source: https://wibako.com/services/construction-machinery-service/liebherr-service
Contact: +48338704200, biuro@wibako.pl