Corrosion inhibitor shall be provided as an additive to the chassis cooling system.
SPARK ARRESTOR
A spark arrestor shall be installed in the chassis air intake system. This arrestor shall be mounted
behind the intake grille to filter out airborne embers.
HORTON FAN
A HORTON fan clutch shall be installed on the engine. A manual switch shall be provided in the
dash, to over ride the fan control in event of fan failure or conditions that may result in overheating
of the engine.
EXHAUST SYSTEM
The exhaust pipe shall be supplied with a heat wrap. The wrap shall extend from the engine turbo
charger to just below the frame rail. The exhaust tubing from the turbocharger to the exhaust after
treatment device shall be stainless steel.
CUMMINS AFTERTREATMENT SYSTEM
The chassis shall be equipped with a Cummins exhaust after treatment system in compliance with
EPA 2010.
TAILPIPE
The tailpipe shall extend from the exhaust muffler to the rear of the vehicle making a 90° bend to
exit the vehicle ahead of the rear tires on the curbside of the vehicle. The end of the pipe shall be
cut square or perpendicular to the exhaust pipe centerline.
An exhaust gas diffuser shall be furnished on the end of the tailpipe.
DIESEL EXHAUST FLUID SYSTEM
The chassis shall be equipped with a 5 gallon (DEF) reservoir system. The reservoir shall contain a
Multifunctional Unit that contains integrated level and temperature sensors. The MFHU also shall
contain a coolant powered heater to thaw DEF in conditions below 12°F (-11°C) to meet
governmental regulations. The reservoir shall be located on the left frame rail behind the front axle
beneath the cab. The mounting system shall use stainless steel mounting brackets to reduce the
possibility of corrosion.
TRANSMISSION
The transmission shall be an Allison 3000EVS automatic transmission with electronic controls.
TRANSMISSION COOLER
An automatic transmission cooler shall be provided as an integral part located in the bottom tank of
the radiator. The cooler shall be of sufficient size to maintain the operating temperature within the
recommended limits of the transmission manufacturer.
TRANSMISSION DRAIN PLUG
A magnetic drain plug shall be installed in the Allison automatic transmission.
