Exhaust Diffusers (Optional) Due to higher exhaust temperatures created during regeneration and for a short period after regeneration, devices have been designed to help dissipate the exhaust gases more effectively which reduces the impact of the heat. These exhaust dif- fusers reduce the temperature of the exhaust gas by diffusing the heat outlets. Diffusers also reduce the risk of extremely high temperature areas at the point of exhaust. Three different diffusers are available to cover different exhaust applications. Note: Exhaust diffusers must not be modified in any way.
If an exhaust diffuser must be removed for truck body installation purposes, the diffuser must be installed exactly as the OEM installation. W2006301 W2116210 Fig. 4 Straight Exhaust Stack Vertical Pipe with Top Outlet Dif- fuser Box for Compact DPF Fig. 3 Straight Exhaust Stack out of Vertical Back of Cab Diesel Particulate Filter (DPF) with Diffuser End Vertical and Top Five inches Perforated W2006300 Fig. 5 Straight Exhaust Stack Vertical Pipe with Side Outlet Diffuser Box for Compact DPF W2111351 Fig. 6 The inside edge of the exhaust diffuser (item 1) should be parallel to the centerline of the truck within 5 degrees.
Miss-alignment of this diffuser could allow exhaust gas to en- ter the air inlet hood (item 2) during engine operation. Mack Body Builder Instructions PI / CHU, AN / CXU, GR / GU, TD, LR, TE / MRU USA141023213 Date 2.2018 Body Builder; Engine, MP7, MP8, and MP10 Page 24 (40) All Rights Reserved