240 OPERA TION

The Mack SCR system simple and fective, with few components. consists a Aftertreatment DEF tank positioned near the standard diesel tank, plus a Aftertreatment DEF pump, Aftertreatment DEF Dosing unit and SCR catalyst.

The advantage using DEF that enables the engine use less EGR - - and higher oxygen levels - - for better combustion, while meeting the A near - zero NOx emissions requirement 0.2 g/hpNOx. using DEF , avoid the disadvantages increasing EGR massive levels. This results better fuel economy from your Mack engine. W2055490

V ertical side inlet W2055491

V ertical SCR, vertical inlet

Caution

not put diesel fuel the Aftertreatment DEF tank. Diesel fuel, sprayed into the hot exhaust along with the DEF , could ignite explosively causing a fire resulting personal injury damage the exhaust system.

Diesel Exhaust Fluid (DEF)

Diesel Exhaust Fluid (DEF) a reactant s key the SCR process. It’ s a nontoxic, ultra - pure solution urea and ultra - pure water . Urea a compound nitrogen that turns ammonia when heated. The fluid non flammable, and not dangerous when handled recommended. However , highly corrosive certain metals, especially copper and Read the separate section concerning the handling DEF Use only Diesel Exhaust Fluid that clearly labeled meeting ISO - 22241 standards, and certified the American Petr oleum Institute. The container must display the API certification seal. Never use agricultural industrial grade ea. Use fluids other than API certified Diesel Exhaust Fluid will compromise aftertreatment system increase and may impact your product Never dilute DEF with water any other fluid. recommended that DEF not stored extreme hot cold for prolonged Follow the instructions for proper storage and handling indicated the container provided with the

Note: Agriculture mixtures are not pure enough for use the SCR system and impurities the solution will comprise the SCR system.

Diesel Exhaust Fluid (DEF) Handling

When handling DEF solution, important prevent contact with electrical connections. There a risk that the DEF will cause oxidation that cannot removed.

W ater compressed air not help, since DEF quickly oxidizes certain metal. a disconnected connector comes into contact with the DEF solution must replaced immediately prevent the DEF solution from creeping further into the copper wiring.

Caution

When detaching hoses and not spill DEF disconnected unsealed DEF spilled a disconnected unsealed connector , the connector must replaced immediately .

Things know about spilled Diesel Exhaust Fluid (DEF)

DEF solution comes into contact with the skin: rinse with plenty water and remove contaminated

DEF solution comes into contact with the eyes: rinse for several minutes and call for medical help necessary inhaled: breathe fresh air and call for medical help necessary not allow the DEF solution come into contact with other

The DEF solution not flammable. the DEF solution exposed high temperatures, breaks down into ammonia and carbon dioxide.

The DEF solution highly corrosive certain metals, including copper and brass. the DEF solution spilled onto the vehicle, wipe f the excess and rinse with water . Spilled DEF solution can form concentrated white crystals the vehicle. Rinse f these crystals with water .

Note: not flush DEF spillage into the normal drain system.