Freightliner exhaust guidelines
Nov 1, 2007 12:00 PM, By Rick Weber
In the Exhaust Tailpipe Design Guideline, a minimum distance of 150 mm from tailpipe to outer edge of the body is strongly recommended. For exceptional cases where this can't be achieved, the distance should be maximized as much as possible with 50 mm being the minimum allowable distance. Typical exhaust gas temperature distribution zones have been provided for relocation guidance in these cases.
He said he highly recommends that the tailpipe never be relocated from the position installed by the original vehicle manufacturer. Relocation of a horizontal exhaust tailpipe outlet is acceptable but not recommended by Freightliner. Alternative tailpipe designs are available from Freightliner
The exhaust tailpipe is to be installed so that the outlet face is located directly downward. The outlet face should be parallel to the ground within five degrees. Never point the exhaust upwards or towards any vehicle components.
He said vehicle components (tires, hoses, frame rails, etc) should be located no closer than 300 mm from the exhaust tailpipe outlet in the transverse, underside, or exhaust gas flow directions; and 50 mm from the top surface of the exhaust tailpipe. Retain the original ground to tailpipe clearance as installed by the vehicle manufacturer. The tailpipe must be no lower than the bottom of the ATD.
Neblett said the mitigator is made of aluminized 409 stainless steel. Attention should be given to the materials of the connecting pipes for possible galvanic corrosion. Proper weld materials must be used for correct joint creation when using aluminized 409 stainless steel. It is recommended that the tailpipe be secured to another pipe that is connected to the outlet of the ATD using a marmon style, V-band clamp, an exhaust seal clamp, or direct welding.
The 16K AWD multi-leaf spring rear suspension for all-wheel-drive trucks has a data code of 622-1G3 and is used with a 10K front drive axle (400-1D4). The 12K flat-leaf suspension has a data code of 620-002 and provides enhanced front-end stability for boom/crane/manlift trucks. The M2 snow shield has a data code of 701-008 and protects the cab's HVAC air intake. The under-step mounted ATD with vertical tailpipe has a data code of 016-1BU and is designed for dump, tank, and utility bodies.
Neblett said Freightliner also created an additional system that can be ordered straight from the factory: a right-hand under step mounted horizontal ATD with right-hand horizontal tailpipe. It has a data code of 016-1BT, is available on M2106 day/extended/crew/all-wheel-drive vehicles, and is designed for fire/emergency and utility vehicles, and RVs.
Available starting in December with Cummins ISB and ISC is the right-hand under step mounted horizontal ATD with right-hand horizontal tailpipe. It has a data code of 016-1B6, and will replace the 016-1BT.
“It sits above the bottom of the transfer case, so your exhaust pipe should not have any interference as far as ground clearance,” Neblett said.
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