This Operator’s Manual describes the handling and maintenance of Scania DC12 and DI12 Industrial Engines with EMS S6/PDE injection systems. The engines are of direct-injection, liquid-cooled, four-stroke, 6-cylinder inline diesel type. These engines have turbochargers and charge air coolers; see page 14.
Common applications are as power units in construction machines, generator sets, earth-moving, railway and forestry machines as well as in irrigation systems. The engines can have different output and speed settings. The normal output setting of the engine (performance code) is indicated on the type plate, see page 14.
Scania has always been very much at the leading edge when it comes to developing and producing engines which are as environmentally friendly as possible.
Major progress has been made on reducing harmful exhaust emissions as required to be able to meet the stringent environmental standards stipulated on almost all markets. At the same time, we have been able to maintain high quality in terms of performance and operating economy for Scania Industrial and Marine Engines.
To preserve these qualities throughout the entire service life of the engine, it is important for the operator/owner to follow the instructions on running, maintenance and the choice of fuel and oil as outlined in the manual.
Other efforts to preserve the environment we all share are possible by ensuring that the person carrying out servicing and maintenance always makes sure that environmentally hazardous waste after servicing and repairs (oil, fuel, coolant, filters, batteries, etc.) is dealt with and disposed of in accordance with applicable environmental standards. On a number of pages, this Operator’s Manual contains specially highlighted text with instructions to help protect our environment during certain servicing and maintenance work.
General Warranty Limitations
To retain the dependability of the exhaust emission control originally built into your Scania industrial diesel engine, it is essential that the engine is installed according to Scania installation instructions and emission certificates.
In addition, you are responsible for the performance of all scheduled maintenance and necessary repairs on your new Scania industrial diesel engine. Scania may deny a warranty claim if your failure to perform maintenance resulted in the failure of the warranted part, listed under Parts covered by the Warranty above.
Receipts covering the performance of regular maintenance should be retained in the event questions arise concerning maintenance. The receipts should be transferred to each subsequent owner of the engine with the emission warranted engine.
The Warranty covers the cost of repair and replacement parts and services of warranted components and systems performed by an authorized Scania distributor or dealer using genuine Scania parts. You may elect to have maintenance, replacement or repair of these components and systems performed by any repair establishment or individual without invalidating the Warranty.
The use of other than Scania replacement parts also does not invalidate the warranty on other components unless such parts cause damage to warranted parts. However, the cost of such services or parts will not be covered by the Warranty.
EMS engine management system
This engine has an electronic management system, EMS (Engine Management System) with unit injectors (PDE) which provide each cylinder with the right amount of fuel at the right time in all operating situations.
The EMS system consists of a control unit (S6) and sensors for speed, charge air temperature and pressure, coolant temperature, oil pressure, accelerator pedal/throttle actuation which constantly emit signals to the control unit.
With the aid of this input data and the programmed control software, the correct fuel amount and correct injection time are calculated for each unit injector under the specific operating conditions.
The EMS system sensors can also be used to emit signals to the instruments in the instrument panel. The control unit constantly checks the sensors to make sure they are operational.
The control unit contains monitoring functions to protect the engine in the event of a fault which would otherwise damage it. In the event of a fault, for example alarm level for low oil pressure or high coolant temperature, the S6 control unit sends a CAN message to a coordinator.
The main task of the coordinator is to pass on data by means of CAN communication from the engine control unit to other control units and signals to gauges and lamps in the instrument panel. The coordinator also has monitoring functions.
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