Paccar Kenworth T680 2019, Manual

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5-4
Section 5
Exhaust & Aftertreatment
INSTALLATION REQUIREMENTS AND DIMENSIONS FOR DEF SYSTEM
When relocating any DEF system components, the locations must meet the guidelines below. Failure to comply may result
in non-conformance to EPA standards and engine shutdown.
With all relocating procedures, general clearances and routing guidelines must be followed. See section 9 of this manual
for general routing guidelines.
When relocating the components the maximum pressure DEF hose length, from Supply module to Dosing Module, is 5.5
meters (216.5").
Maintain a minimum of 3" clearance to shielded exhaust components when routing DEF lines to prevent possible melting.
If the DEF tank is relocated the coolant lines will need to be modified. During this process if the tank is moved forward on
the chassis (ie closer to the engine) it is necessary to remove excess coolant lines and maintain the original routing path.
If the tank is moved rearward on the chassis the additional length of cooling line required to complete the installation must
be installed in a straight section of the existing coolant routing lines. This process minimizes the change in coolant flow by
mitigating changes in restrictions. Changes in restriction are added with excessive line length and bends. Work with your
local Kenworth dealer if you are unsure about the coolant line modifications.