Crankshaft bearings, commonly associated with code H33016, play a vital role in supporting the crankshaft within the engine block, enabling smooth rotation under heavy loads. In the MAN L21/31, these bearings endure significant mechanical and thermal stresses. Failure or excessive wear in crankshaft bearings can lead to severe engine damage. Therefore, consistent inspection, lubrication, and prompt replacement are critical for maintaining engine health and avoiding costly repairs.
Connecting rods in the MAN L21/31, with an estimated code of H33001, serve as the crucial link between pistons and the crankshaft, translating reciprocating motion into rotational energy. Bearings, approximately H33016, support the connecting rods and reduce friction between moving parts. Due to constant mechanical stress, these components are prone to wear and require regular monitoring and maintenance to prevent catastrophic engine failure and ensure smooth operation.
The MAN L21/31 engine relies heavily on its pistons and piston rings, crucial components for maintaining engine compression and efficient combustion. Pistons, estimated at code H27222, withstand intense heat and pressure while transferring force to the crankshaft. The piston rings, likely coded around H31110 series, provide a critical seal between piston and cylinder walls to prevent gas leakage and control oil consumption. Regular inspection and timely replacement of these parts are vital for optimal engine performance and longevity.
'When it comes to low routine maintenance schedule, MAN L28/32 offers a great advantage with 20,000 hours between overhauls when operated on HFO. A low level of deformation and a low level of mechanical stresses (i.e. low wear-rates) are achieved through its sturdy engine structure and amply dimensioned running gear.'
Man Energy Solutions announced the launch of its MAN 49/60DF engine type at the SMM trade fair in Hamburg. Dual fuel engines are capable of running on LNG, diesel and HFO, as well as many more sustainable fuels. It sets the benchmark for the fuel efficiency of four-stroke engines - both in petrol and diesel mode. Based on the new 49/60 engine platform, the engine features the latest technologies from MAN, including two-stage turbocharging and common rail fuel injection. Under the current Fuel EU draft, the engine's baseline efficiency and fuel-flexible design provide multiple pathways to achieve emissions compliance through 2050. It can essentially run on methanol and LNG if demand arises at a later stage.
'When it comes to low routine maintenance schedule, MAN L28/32 offers a great advantage with 20,000 hours between overhauls when operated on HFO. A low level of deformation and a low level of mechanical stresses (i.e. low wear-rates) are achieved through its sturdy engine structure and amply dimensioned running gear.'
MAN 28/32S is designed for stationary power plants. It is a reliable and robust engine model which can operate on a variety of liquid fuels. 28/32 complies with all emission limits with the potential for further exhaust gas treatment and can provide up to 4,230 kWm power.
MAN Energy Solutions has won an order for four dual-fuel MAN B&W 6S60ME-GI engines for the construction of two 8,000-lane-meter hybrid Ro-Ro vessels for CLdN. Each vessel will also be equipped with 2 × 6 MW electric propulsion motors, enabling the vessel to maintain a service speed of 16-17 knots in all-electric mode. The newbuildings will further reduce carbon intensity by 40% while meeting NOx Tier III standards. Human energy solutions. The ME-GI (-Gas Injection) engine sets a new industry standard for two-stroke propulsion engines on ro-ro, PCTC, container ships, bulk carriers, tankers and LNG carriers.
ME-Gi engines deliver the industry's lowest CO2 and methane leak emissions for LNG-fueled ships. The diesel principle ensures 100% reliable operation during gas load changes with only the normal amount of pilot oil added.
'When it comes to low routine maintenance schedule, MAN L28/32 offers a great advantage with 20,000 hours between overhauls when operated on HFO. A low level of deformation and a low level of mechanical stresses (i.e. low wear-rates) are achieved through its sturdy engine structure and amply dimensioned running gear.'
MAN 28/32S is designed for stationary power plants. It is a reliable and robust engine model which can operate on a variety of liquid fuels. 28/32 complies with all emission limits with the potential for further exhaust gas treatment and can provide up to 4,230 kWm power.