Engine Liebherr D946 A7

Liebherr D946 A7 engine after overhaul – ready-to-install unit

We offer a fully remanufactured Liebherr D946 A7 engine, a six-cylinder inline diesel with a displacement of approx. 12.0 l, prepared for immediate installation in the machine or adaptation to a specific application. This is an engine after a complete overhaul, intended for users who expect consistent performance, reliability and minimal machine downtime.

Scope of overhaul and engine preparation

• Complete overhaul of the block and crankshaft–piston assembly – new liners, pistons, rings, bearings, crankshaft inspection, grinding and balancing.
• Cylinder head and timing system – refurbishment or replacement of valves, guides and stem seals, head resurfacing and camshaft inspection.
• Lubrication and cooling system – new or remanufactured oil pump, verification of the water pump and thermostat, a complete set of new seals and parts subject to wear.
• Fuel injection system repair – refurbishment of injectors and high-pressure pump, verification of pressures and corrections on the test bench.
• Auxiliary equipment installation – engine preparation for a specific machine (pulleys, hydraulic pumps, timing case, wiring harness).

Specifications and applications – engine for excavators, loaders, dumpers

The Liebherr D946 A7 engine is used in heavy construction and industrial machinery, where high torque and continuous operation are required. It is suitable as:

• engine for an excavator, crawler or wheeled,
• engine for a loader, wheel or telescopic,
• engine for a site dumper,
• engine for a stationary machine (crusher, screener, power unit).

Depending on the software version and auxiliary equipment, the overhauled engine can achieve power output comparable to the factory specification and operate in demanding off-road conditions.

Diagnostics, dyno testing, service and repair

Each overhauled engine undergoes full electronic diagnostics and testing on the dyno under load. We verify oil pressures, temperatures, injection corrections and system tightness so that the engine after repair is ready for work from the very first start.

We provide warranty and post-warranty service, including mobile service and construction machinery service in areas such as Kraków, Małopolska and Podhale. We carry out both repairs and overhauls of engines based on your existing unit.

Why choose a Liebherr D946 A7 engine after complete overhaul?

• Reduced downtime – a ready, tested overhauled engine keeps machine downtime to a minimum.
• Reliability – new or remanufactured components to factory standards and a full dyno test ensure stable operation in tough conditions.
• Configuration flexibility – adapting auxiliary equipment to a specific machine so that installation is as non-invasive as possible.
• Technical support – assistance during commissioning and parameter setup.

For customers who prefer to keep their own unit, we also carry out engine repair based on the existing block, with the same scope of work as for a full remanufacture.

FAQ – frequently asked questions about the overhauled Liebherr D946 A7 engine

• Does the overhauled Liebherr D946 A7 engine have power similar to a new one?
  Yes, an engine after a complete overhaul and dyno testing achieves parameters close to the factory specification. We document key values (pressures, temperatures) for each unit.
• What are the warranty conditions for the overhauled engine?
  The warranty is valid with correct installation, use of recommended oils, filters and regular service in line with the maintenance schedule. Detailed conditions are agreed individually, depending on the application.
• My old engine has a different timing case, an additional hydraulic pump or a different turbocharger. Is repair and adaptation possible?
  Yes, we offer adaptation of auxiliary components and repair of the engine based on your unit. We adjust the configuration so that installation in the machine is as trouble-free as possible.
• Do you support machine diagnostics after the engine replacement?
  Our mobile service can travel to your site, perform on-site diagnostics and make start-up adjustments.

Liebherr engines – brand and technology

Liebherr is an international group originating from Germany, founded in 1949 by Hans Liebherr. Over time, the company has grown into a group comprising many manufacturing plants and subsidiaries specializing in, among others, construction machinery, mining equipment, cranes, handling equipment and components such as diesel engines.

The diesel engine series D934, D936, D944, D946 and related types were designed specifically for heavy-duty applications – including excavators, loaders, dumpers, cranes and stationary installations. These power units combine high power density, low fuel consumption and the ability to operate in harsh environmental conditions.

Modern Liebherr engines meet current exhaust emission standards (depending on version, up to EU Stage V / EPA Tier 4f) and use advanced injection systems and sophisticated electronic control units. This makes them a popular choice in construction and industrial machinery, where reliability, long service life and good availability of spare Parts are essential.