Engine Liebherr D934 A7

Liebherr D934 A7 engine after overhaul – ready for installation

We offer a fully refurbished Liebherr D934 A7 engine after a complete major overhaul, prepared for immediate installation in your machine. The unit has undergone a full overhaul, has been tested on a load test bench and is available off the shelf as an alternative to a brand-new engine.

Scope of the engine overhaul

• Complete disassembly and inspection – assessment of the condition before overhaul, measurements of the block, crankshaft, cylinder heads and auxiliary components.
• Replacement of key components – new pistons, liners, rings, bearings, gaskets and other worn parts.
• Machining – crankshaft grinding, reconditioning of cylinder heads, valve seats and guides, matching components for the overhaul.
• Fuel injection system – injectors and pump refurbished or replaced with new, branded spare parts.
• Final test on the test bench – full-load tests on the dynamometer, with recorded test parameters available on request.

Applications – engine for excavators, dumpers and loaders

The Liebherr D934 A7 is a four-cylinder diesel engine used as:

• engine for crawler or wheeled excavators,
• engine for wheel loaders,
• engine for site dumpers / haul trucks,
• engine for material handling or industrial machines.

A ready-to-install, overhauled engine reduces machine downtime and makes it possible to replace the unit quickly instead of carrying out a long in-frame overhaul in the machine.

Service, diagnostics and parts for Liebherr D934 A7

We offer comprehensive service and repair of Liebherr engines – from pre-overhaul diagnostics and complete major overhaul through to operational support. We also supply new and remanufactured parts.

• Diagnostics on the test bench and on the machine – detecting problems before sending the engine for overhaul.
• Selection of parts for overhaul and technical support when ordering replacement parts.
• Mobile service – on-site visits to machines in the regions of Kraków, Małopolska and Podhale, among others.
• Construction machinery service – repair of engines, attachments and related systems.

Why choose an engine after a major overhaul?

• Reliability – an engine after overhaul and test bench trials ensures stable operating parameters.
• Cost savings – the cost of an engine overhaul is usually lower than purchasing a factory-new unit.
• Available immediately – a ready, overhauled engine minimizes machine downtime.
• Flexibility – the engine can be configured for a specific machine layout and customer attachments, including additional parts.

Location

Our headquarters are located in Kojszówka, Małopolskie province. We ship engines throughout Poland and abroad. On request we can organize removal of the old engine, its overhaul and dyno testing, installation of the overhauled unit and commissioning after the overhaul.

Contact and quotation

If you are interested in refurbishing the engine Liebherr D934 A7, purchasing an overhauled engine or a ready-to-install replacement unit after overhaul, contact us for a detailed quotation. We will provide information on the scope of the overhaul, test bench parameters and available parts for your machine.

Frequently Asked Questions (FAQ)

• What is the difference between an overhauled engine and a used engine without overhaul?
  An engine after a major overhaul is completely disassembled, inspected and assembled using new or remanufactured parts. After assembly it is tested on a dynamometer, giving you confirmed operating parameters. A used engine without overhaul does not provide such certainty regarding component wear and remaining service life.
• Will I receive a dyno test report?
  Yes, on request we provide a report from the dyno tests, containing key operating parameters of the engine after overhaul. The test bench data confirms correct pressures, temperatures and power output.
• Which parts are replaced during the overhaul?
  As part of the overhaul we typically replace complete cylinder kits, bearings, rings, gaskets and a range of other consumable parts. Depending on the condition of the engine, components of the injection system, the turbocharger or pumps are also replaced. The scope of replaced parts is described in the offer and in the documentation supplied with the engine.
• Can I order an overhaul of my own Liebherr D934 A7 engine?
  Yes, we also carry out overhauls of engines supplied by the customer. The engine is delivered to our workshop, dismantled, diagnosed and then we prepare an overhaul cost estimate together with a list of recommended parts. After approval we perform the work and final tests on the dynamometer.
• How long does the overhaul or engine replacement take?
  The duration of the overhaul depends on the extent of damage and the availability of parts. When purchasing a ready, overhauled engine, machine downtime is limited mainly to the replacement itself – installation and commissioning of the unit, often without the need for additional dyno work on the customer side.
• Can I buy only the parts for a do-it-yourself overhaul?
  We also offer the sale of individual parts for the overhaul of a Liebherr D934 A7 engine. We select parts based on the engine serial number and the specific machine application to avoid errors. If necessary, we help in selecting replacement parts with parameters comparable to the original.

Liebherr brand – a few words about the manufacturer

Liebherr is an international technology group originating from Germany, known primarily for its construction machinery, lifting equipment and advanced powertrain solutions. For decades the company has been developing its own diesel engines used, among others, in excavators, loaders, dumpers and material handling machines.

Liebherr engines are designed for operation in the harshest conditions – in mining, construction, recycling and waste management. They are characterized by high durability, good availability of parts and the possibility of multiple overhauls, which significantly extends their service life and reduces total operating costs.

Thanks to a well-developed service network and the availability of spare parts, Liebherr engines can be effectively serviced, refurbished and tested on stationary and mobile test benches. This is why overhauling a Liebherr D934 A7 engine, combined with dyno tests and the use of properly selected parts, is an attractive alternative to purchasing a new power unit.