Scania DI13 pdf manual SCR (Selective Catalytic Reduction) is a system in which reductant is added to the exhaust gases in order to reduce the nitrogen oxide (NOx) content. This document describes SCR system components and how they should be connected. Reductant is a solution consisting of urea and water, and is usually called AdBlue®, DEF, ARLA 32 eller AUS 32, depending on the market.
Scania DI13 If the engine is equipped with an SCR system, the reductant is added to the exhaust gases upstream of the catalytic converter. This reduces nitrogen oxide emissions. Reductant in accordance with ISO 2241 contains 32.5% by weight of urea and freezes at approximately 11°C (12°F). When the solution freezes, ice and urea always maintain the same concentration. Always store reductant at a temperature between -11°C and 30°C (12-86°F).
Scania DI13 SCR system installation Cleanliness is very important when working on the reductant circuit. Clean thoroughly around all parts to prevent dirt from entering the system. When working on the SCR system, the reductant connections may only be lubricated with soapy water or with distilled water with a 3% urea mixture. Any other types of lubricants may block and damage the components in the SCR system, scania trucks,trucks scania,scania trucking,scania cars,scania car,scania truck usa.
Scania DI13 SCR system service manual Reductant is highly corrosive. For this reason, only pipes and couplings resistant to urea may be used in the SCR system. Always rinse away reductant spillage on connections and other parts with lukewarm water to prevent corrosion. If reductant seeps into electrical connections or electrical cables, these must be renewed.
Scania Exhaust pipe bends
The sum of the exhaust pipe bends between the turbocharger outlet and NOx sensor upstream of the exhaust routing valve must not exceed 270°. The sum of the exhaust pipe bends between the turbocharger outlet and SCR catalytic converter inlet must not exceed 540°.
Scania Pipe material
The exhaust pipe between the evaporator and the SCR catalytic converter must be made from stainless metal type 1.4301 or 1.4509, US grade 316L or equivalent. Scania also recommends that this material is used for other exhaust pipes downstream of the SCR catalytic converter. Other instructions on exhaust system shape and fitting are available in 02:04 Exhaust system.
Scania DI13 Service Manual There should always be a flexible connection between the exhaust system and the engine which absorbs the movement of the engine and changes in length in the exhaust system due to temperature changes. Also see 02:04 Exhaust system. The brackets for exhaust routing valve, bypass pipe, evaporator and SCR catalytic converter must be able to bear the weight of the component. The weight of the components must not load the exhaust bellows or turbocharger.
Scanie Marine Engine Tighten the V-clamps in the SCR system after the engine has warmed up to working temperature for the first time. Carry out the retightening when the engine has cooled down again. Tightening torque 20 Nm.