Paccar Kenworth T800 2012, Manual

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2-5
Section 2
Safety & Compliance
08/12
• NO
x
Sensor
• The following modifications may only be done within the guidelines of the “DEF System Relocation Guide.”
• Modifications to Diesel Exhaust Fluid (DEF) throttle, suction, or pressure lines
• Modification or relocation of the DEF tank
• Modification of coolant lines to and from the DEF tank
• All DEF and coolant lines should be routed, protected, and properly secured to prevent damage during vehicle
operation or other components
• If relocation of the DCU or ACM is necessary, use existing frame brackets and mount inside of frame flanges
where necessary. Do not extend the harnesses
• The DPF, the SCR catalyst, or their mounting may not be modified
• The NO
x
sensor may not been relocated or altered in any way
• Exhaust pipes used for tailpipes/stacks must be properly sized, and must prevent water from entering
• Ensure adequate clearance between the exhaust and body panels, hoses, and wire harnesses
• The body in the vicinity of the DPF must be able to withstand temperatures up to 400°C (750°F)
• Do not add thermal insulation to the external surface of the DPF
• The SCR water drain hole may not be blocked
• Allow adequate clearance (25mm (1 inch)) for servicing the DPF sensors, wiring, and clamped joints
• Drainage may not come in contact with the DPF, SCR catalyst, sensors or wiring
• Allow sufficient clearance for removing sensors from DPF. Thermistors require four inches. Other sensors
require one inch
• Wiring should be routed, protected from heat, and properly secured to prevent damage from
other components
• The exhaust system from an auxiliary power unit (APU) must not be connected to any part of the vehicle
after-treatment system or vehicle tail pipe.
Cooling System
The following are highlights of some of the more common or critical aspects of this system.
• Modifications to the design or locations of fill or vent lines, heater or defroster core, and surge tank are not
recommended
• With the exception of post-thermostat installation, additional accessories plumbed into the engine cooling
system are not permitted, at the risk of voiding vehicle warranty
• Coolant level sensor tampering will void warranty
• When installing auxiliary equipment in front of the vehicle, or additional heat exchangers, ensure that
adequate air flow is available to the vehicle cooling system. Refer to engine manufacturer application guide -
lines for further detail
• When installing FEPTO drivelines, the lower radiator anti-recirculation seal must be retained with FEPTO
driveline clearance modification only
• Changes made to cooling fan circuit and controls are not allowed, with the exception of AC minimum fan on
time parameter