- ATS
- Automatic transfer switch. Moves the load from the mains to the generator when the power fails, and back again when it returns.
- CES
- Cummins Engineering Standard. Cummins’ own specifications, for example for engine oil (such as CES 20086) and coolant (CES 14603).
- Core
- The old part you return when you buy a ReCon exchange part, so it can be remanufactured in turn.
- CPL
- Control parts list. The number that records how an engine was configured at the factory. It is on the dataplate, next to the ESN.
- Cruise Kit
- Cummins’ pack of routine service parts for an Onan marine generator model, in one case.
- Dataplate
- The plate on the engine that carries the engine serial number (ESN), the CPL and the model.
- DCA
- A supplemental coolant additive, used with conventional and hybrid coolants to keep them protective. OAT coolants do not need it.
- DPF
- Diesel particulate filter. Traps soot in the exhaust. Most Stage V engines between 19 and 560 kW use one.
- ECM
- Electronic control module: the engine’s computer.
- EN 15940
- The European standard for paraffinic diesel fuels, including HVO.
- ESN
- Engine serial number. The unique number on a Cummins engine’s dataplate, and the fastest way to the right part.
- Euro 6
- The EU emission standard for road vehicles, including buses and trucks.
- HVO
- Hydrotreated vegetable oil. A renewable diesel made from waste fats and oils, which can be blended with diesel in any proportion.
- IMO Tier II and III
- International limits on nitrogen oxides from marine diesel engines. Tier III applies only in designated nitrogen oxide emission areas, which do not include the Mediterranean.
- INSITE
- Cummins’ PC software for reading fault codes and adjusting engine settings.
- kVA and kW
- kVA is apparent power and kW is real power. At the usual 0.8 power factor for generator sets, 100 kVA gives 80 kW.
- Load bank test
- Running a generator against an artificial load to prove it can carry its rated output.
- Nameplate
- The plate on a generator set that carries its model number, spec letter and serial number. On Onan QD marine sets it is on the side of the control box.
- OAT coolant
- Organic acid technology. A long-life coolant that does not need supplemental additives.
- Prime power
- A generator that is the main source of power, running for unlimited hours at a varying load.
- QuickServe Online
- Cummins’ online manuals and parts catalogues, searchable by engine serial number. Owners can register free.
- Raw water
- The sea water a marine engine or generator draws in to cool itself, through a strainer, a pump impeller and a heat exchanger.
- ReCon
- Cummins’ own remanufactured engines and parts, built to factory specification with a Cummins warranty.
- SCR
- Selective catalytic reduction. Cuts nitrogen oxides in the exhaust using diesel exhaust fluid (AdBlue).
- Siphon break
- A valve that stops sea water siphoning back into an engine or generator when the exhaust mixer sits below the waterline.
- Sound shield
- The insulated housing around a marine generator that cuts noise.
- Spec letter
- The last letter of a generator set’s model number. It changes with significant production changes and decides which parts fit.
- Stage V
- The current EU emission stage for non-road engines, such as those in construction machines, under Regulation (EU) 2016/1628.
- Standby power
- A generator that runs only when the mains power fails.
- Sulphur ECA
- An emission control area that limits fuel sulphur to 0.10 %. The Mediterranean has been one since 01-05-2025.
- Zinc anode
- A sacrificial zinc part that corrodes in place of the metal around it in the sea-water circuit, and is replaced on schedule.
Keep it running.
Monday to Friday 07:30 to 16:30, Saturday 07:30 to 13:00