Marine Fuel Injection Overhaul for Dry Dock & Planned Maintenance

Coordinate Pump and Injector Work with the Vessel Maintenance Window - Before the Equipment Leaves the Ship

A dry-docking period is one of the best opportunities to overhaul mechanical fuel-injection equipment, but only when the component work is integrated into the vessel schedule. Waiting until the pump has already been removed can create avoidable pressure on transport, inspection, spare-parts procurement and final calibration. We therefore encourage technical superintendents and shipyards to contact us during the planning phase.

Our marine service is not limited to one pump manufacturer or one engine family. Depending on pump design, condition, technical documentation, spare-parts availability and suitable test-bench adaptation, we assess, overhaul, repair and calibrate mechanical fuel injection pumps from Bosch, LÓrange (also searched as L'Orange), Kugelfischer and other manufacturers. We accept enquiries for mechanical fuel-injection equipment used on all categories of marine engines operating either at fixed speed or across a variable speed range, including main propulsion, auxiliary, generator and other shipboard duties. Common Rail systems are not part of this service scope.

Plan the Injection Work Around the Vessel Schedule

For planned projects, we establish the technical and logistical framework before dispatch. The most useful information includes:

planned engine shutdown and pump removal date
shipyard and vessel location
latest practical dispatch date to Germany
required return date and intended engine reassembly date
expected sailing or commissioning date
whether the work concerns one pump, a tandem system, individual cylinder pumps or a complete pump-and-injector set
whether the engine operates at fixed speed or variable speed
availability of historical calibration or acceptance data

Suitable for Main Propulsion, Auxiliary and Generator Engines

A variable-speed main engine and a fixed-speed generating set can require very different calibration priorities. Main-propulsion equipment may need assessment over several speed and load points, while fixed-speed auxiliary or generator applications can require particular attention to repeatability and uniformity around the rated operating point. The engine duty must therefore be documented before test planning begins.

What Can Be Included in a Planned Overhaul

technical identification and incoming condition documentation
complete dismantling of the mechanical injection pump
controlled cleaning and dimensional inspection
assessment of pumping elements, delivery components, tappets, cam-related parts and control mechanisms
repair, reconditioning or replacement of worn components
spare-parts research and obsolete-parts support
precision reassembly
test-bench operation and calibration according to verified data
inspection of injector or nozzle-holder assemblies where agreed
final workshop documentation for the completed work

Large Pumps and Tandem Systems

For large mechanical inline pumps and coupled pump systems, physical size and the number of pumping elements can exceed the practical capacity of ordinary diesel test benches. Our workshop includes dedicated equipment for large injection pumps and mechanically coupled systems serving engines with up to 16 cylinders. This is particularly relevant to historical high-output marine engines and V-engine installations.

Bosch, LÓrange, Kugelfischer and Other Manufacturers

Dry-dock projects are accepted by application, not only by brand. We evaluate mechanical injection pumps from Bosch, LÓrange, Kugelfischer and other manufacturers, including mixed fleets and older engine families. Technical acceptance depends on pump construction, test requirements, documentation and the parts situation.

Reduce Schedule Risk Before the Docking Window

The earlier the pump is identified, the more time is available to locate historical parts, verify data and determine whether unusual test-bench adaptations are required. This is especially important for obsolete injection systems where a worn internal component may not be obtainable from normal stock.

Recommended Project Sequence

Send pump and engine identification before the vessel enters the yard.
Confirm the intended maintenance scope and schedule.
Coordinate transport and customs requirements where applicable.
Dispatch the complete agreed component set after removal.
Workshop inspection and technical findings.
Repair decision and spare-parts approval.
Overhaul, reassembly and calibration.
Return shipment for engine installation.

Request Dry-Dock Planning Support

Send us the vessel maintenance window and engine data as early as possible. We can then determine whether the planned component set is suitable for our workshop and what information should accompany the pumps and injectors.