Marine Gearbox Overhaul

On-Site Specialist Marine Gearbox Overhaul — Worldwide Mobilization

The gearbox is a critical component of any marine vessel, transferring power from the engine to the propeller. When it fails or degrades, the consequences range from reduced operational efficiency to complete loss of propulsion — with significant financial and safety implications.

Hedberg Technical Services delivers professional on-site marine gearbox overhaul, inspection, and repair for vessels and marine industrial operations worldwide. We mobilize directly to your vessel or facility — eliminating the delays and logistics of shipping a gearbox to a remote workshop — and perform the work on-site to get your vessel back in operation as quickly as possible.

Why Marine Operators Choose Hedberg Technical Services for Marine Gearbox Overhaul and Inspection

Minimize Downtime

On-site execution — vessel stays in port. We perform complete gearbox overhauls directly on board. This eliminates the time and risk of removing and shipping a large marine gearbox, and means your vessel can return to service faster.

Maximize Quality

Alignment precision on every job. Proper alignment of the gearbox with the engine and propeller shaft is critical for optimal performance. We verify alignment at every stage of reassembly, ensuring correct meshing, bearing load distribution, and lubrication flow before the vessel returns to service.

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Marine Gearbox Overhaul We Service

Main Propulsion Gearboxes — overhaul and inspection of main drive gearboxes on cargo vessels, tankers, ferries, and offshore support vessels.

Ball Mill Gearboxes — full overhaul, bearing replacement, and condition assessment of ball mill drive gearboxes in mineral processing plants.

Thruster Gearboxes — inspection and overhaul of azimuth thruster and bow thruster gearboxes on offshore vessels, platform supply vessels, and specialized marine craft.

Winch and Deck Machinery Gearboxes — service and overhaul of gearboxes driving anchor winches, mooring winches, crane drives, and other deck machinery.

Reduction Gearboxes — complete overhaul and condition assessment of marine reduction gearboxes transmitting engine power to propeller shafts.

Industrial Marine Gearboxes — inspection and overhaul of gearboxes in marine industrial applications including dredgers, floating cranes, and offshore platforms.

“Based on our experience, we would recommend Hedberg Technical Services for critical gearbox service assignments.”

– Customer

FAQ

Can you overhaul a marine gearbox without taking the vessel to dry dock?

Yes. In most cases we can perform a full overhaul in port with the vessel alongside the quay. We assess access and logistics as part of the pre-mobilization planning process.

What marine gearbox brands do you work with?

We work with all major marine gearbox manufacturers including Reintjes, ZF Marine, Rolls-Royce, Twin Disc, Wärtsilä, Lohmann & Stolterfoht, and others.

How long does an on-board marine gearbox overhaul take?

Overhaul duration depends on gearbox size, condition, and access. After initial inspection and disassembly we provide a firm timeline. Comprehensive functional testing including vibration analysis and performance verification is conducted before the vessel returns to service.

Can you handle emergency breakdowns in port?

Yes. Contact us immediately when a breakdown occurs. We prioritize marine emergency calls and work to mobilize as fast as possible to minimize your vessel’s off-hire time.

What documentation does the vessel owner receive?

Full written technical report including disassembly findings, component measurements, photographs, parts replaced, alignment data, and commissioning results — suitable for class documentation and maintenance records.