Marine Engineering Services
Table of Contents
Marine Diesel Engine Repair & Overhaul
NASS Engineering Services Pvt Ltd provides marine diesel engine inspection, troubleshooting, repair and overhaul support for engines operating onboard vessels, oil rigs and at docks. The service scope includes top and major overhauls, troubleshooting and repair, and inspection of engine condition.
For detailed technical information, see our guide to marine diesel engine troubleshooting and our marine diesel engine overhaul and maintenance guide.
Rolls-Royce / Bergen
NASS Engineering Services Pvt Ltd has dedicated service team for Bergen KRMB-8, KRMB-9, KVMB-12, KVMB-16, B32:36, B32:40, C25:33 Engine overhauls, maintenance and Trouble shooting
Caterpillar
3516B, 3512, 3412, 3408, 3406, 3306, D399, D398, C32, C18, C11, C9
Detroit
4-71, 6-71, 8V71, 12V71, 8V92, 16V92 and 60 Series Detroit Engines
EMD (Electro-Motive Diesel)
645 & 710 Series
MaK
8M20C, 8M25C, 8CM32, 8M43C
Cummins
6BTA, QSK50, KT19, QSM, NTA855
Yanmar
6N165, 6EY18, 6EY22, 6EY26, 6EY33
Niigata
MG17HX, MG19HX, MG22HX, MG25HX, MG26HLX, MG28HX, MG28HLX, MG28AHX, MG31HX
Other Engines
Daihatsu, MTU, Wartsila, MAN, Kirloskar, Yamaha Outboard engines, Perkins, Leyland, Volvo Penta, Lister Petter, Waichai, etc.
Azimuth and Thrusters Overhaul
We at NASS Engineering Services Pvt Ltd has trained and specialized team – Bow / Thunnel Thruster and & Azimuth overhaul in dry dock.
We also undertake overhaul of Niigata Z Peller (ZP31, ZP41), Kawasaki thrusters, Schottle.
Crankshaft Grinding
We here at NASS Engineering Services Pvt Ltd are experts at grinding diesel engine crankshafts. Crankshaft grinding consists of removing a minute amount of finished material from the rod and main journals to rebuild the part back to OEM spec. The full crankshaft remanufacturing process is quite intensive but is critical to complete engine rebuild.
Engine Block Line Boring
Line boring is a very important task, but it is also one that takes the right equipment and the right talent. In many situations, these are simple applications, but in others, they can be very complex requiring a special level of skill. This is especially true in situations where custom solutions are necessary. And at NASS Engineering Services Pvt Ltd will provide you with the right equipment and the right talent required for carrying out the engine block line boring.
Marine Turbocharger Overhaul
NASS Engineering provides turbocharger overhaul support including rotor balancing and bearing renewal for ABB make turbochargers. Turbocharger inspection should be coordinated with the wider engine diagnosis when symptoms include reduced performance, abnormal exhaust temperature, smoke, noise or vibration.
Read our detailed guide to marine turbocharger overhaul for inspection, rotor balancing and bearing considerations.
Marine Governor Overhaul
NASS Engineering carries out complete overhauls for Woodward and Zexel governors. Governor work can include inspection, cleaning, measurement, component renewal, adjustment, calibration and functional testing according to the applicable governor model and service requirements.
For troubleshooting guidance, see our article on marine governor overhaul and common operating problems.
In Situ Liner Honing
Periodical honing can minimize operational cost and increase the service life of cylinder liners and piston rings. For reducing blow by and scuffing as well as lube oil consumption, it is highly recommended to honing the running surface of liner regularly. And we at NASS Engineering Services Pvt Ltd provide you with the provision of in situ liner honing with special tools.
Laser alignment and Vibration analysis
Condition monitoring is the process of monitoring a parameter of condition in machinery (vibration, temperature etc.), in order to identify a significant change which is indicative of a developing fault. It is a major component of predictive maintenance. The use of condition monitoring allows maintenance to be scheduled, or other actions to be taken to prevent consequential damages and avoid its consequences. Condition monitoring has a unique benefit in that conditions that would shorten normal lifespan can be addressed before they develop into a major failure. Condition monitoring techniques are normally used on rotating equipment, auxiliary systems and other machinery (compressors, pumps, electric motors, internal combustion engines, presses).
We here at NASS Engineering Services Pvt Ltd provide with two condition monitoring techniques i.e. Laser Alignment and Vibration Analysis.
CPP & FPP Propeller Overhaul
NASS Engineering has a dedicated team with specialized tools for Schottel and Berg Propulsion controllable-pitch and fixed-pitch propeller work, including seal renewal, stern tube reconditioning and propeller blade reconditioning.
Learn more about fixed pitch propeller overhaul and our CPP vs FPP propulsion systems article.
Waterjet Overhaul & Routine Maintenance
NASS Engineering has a dedicated team for waterjet overhaul and routine maintenance. Inspection can include the intake, impeller or pump, wear components, bearings, seals and steering or reverse mechanisms according to the waterjet design.
See our guide to waterjet propulsion maintenance for practical inspection and maintenance considerations.
Marine Gearbox Repair & Overhaul
NASS Engineering has a specialized team for ZF marine gearboxes and stocks related spare parts. Gearbox service should address the complete transmission assembly and the manufacturer’s inspection and lubrication requirements.
See our technical guide to marine gearbox repair and overhaul for common failure signs, inspection and maintenance considerations.
Dye Penetrant (DP) Test and Magnetic Particle Inspection (MPI)
Magnetic particle inspection is often carried out to help determine an item’s fitness for use or conformity. The method can detect surface or near-surface flaws such as cracks, laps, seams and inclusions in ferromagnetic materials such as iron and steel. One of the main advantages of magnetic particle inspection is that it can give an immediate indication of defects and discontinuities.
We at NASS Engineering Service Pvt Ltd offers best service in Dye Penetrant (DP) Test and Magnetic Particle Inspection (MPI) for various engine components, propeller shafts and blades, etc.
Complete Vessel Refit & Dry Dock Services
NASS Engineering provides complete vessel refit and dry dock support covering hull inspection and cleaning, blasting and painting, anti-fouling, shaft, rudder and propeller maintenance, underwater hull repairs, steel renewal, class surveys and third-party inspections.
Related services include engine and generator overhaul, structural repairs, pipe work, tank inspection and recoating, deck machinery servicing, NDT, load testing and class coordination.
For detailed guidance, see our dry dock ship maintenance checklist and dry dock ship repair scope of work.
