Kenworth T440 2010, Manual

Page: 13 / 120

Section 2
Safety & Compliance
12/09
2-5
NO •
x
Sensor
The following modifi cations may only be done within the guidelines of the “DEF System Relocation Guide.” •
Modifi cations to Diesel Exhaust Fluid (DEF) throttle, suction, or pressure lines •
Modifi cation or relocation of the DEF tank •
Modifi cation 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 fl anges •
where necessary. Do not extend the harnesses
Exhaust pipes between the engine and after-treatment devices or between after-treatment devices may not be •
modifi ed or replaced
The DPF, the SCR catalyst, or their mounting may not be modifi ed •
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 the •
exhaust system
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 suffi cient 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.
Modifi cations to the design or locations of fi ll 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, and may void 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 fl ow is available to the vehicle cooling system. Refer to engine manufacturer application
guidelines for further detail
When installing FEPTO drivelines, the lower radiator anti-recirculation seal must be retained with FEPTO •
driveline clearance modifi cation only