Ford 2013 F-650 Owner's Manual page 291

290
Vehicle System
Exhaust
Engine cooling
DEF (Diesel
exhaust fluid)
Emissions Control System(s) Laws
Federal law prohibits vehicle manufacturers, dealers and other persons
engaged in the business of repairing, servicing, selling, leasing or trading
motor vehicles, as well as fleet operators from knowingly removing or
rendering an emissions control device or system inoperative. Further,
modifications of the emissions control system(s) could create liability on
the part of individual owners under the laws of some states. In Canada,
modification of the emissions control system could create liability under
applicable Federal or Provincial laws.
Maintenance
Instructions for maintenance and service of the noise control system
have been included in the required maintenance services and in the
general maintenance section. To further help minimize noise emissions
degradation throughout the life of the vehicle, Ford Motor Company
recommends that this vehicle should be operated in the manner
described within this owner's manual. Caution should be exercised by the
owner when installing replacement parts to be sure that a tampering act
(as outlined above) is not committed. Note any inspection and service
performed in the maintenance log.
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Scheduled Maintenance
Removal or rendering inoperative exhaust system
components including the catalytic converter -
muffler assembly, inlet pipe, outlet pipe,
resonator and flexpipe. Rotation of horizontal
exhaust system directional outlet pipe to cause
the exhaust to be emitted in a direction other
than the orientation the vehicle was originally
produced with.
Removal or rendering inoperative the fan clutch.
Removal or modification of the fan shroud.
Replacing a fixed fan with a fan of increased
diameter, different number of blades or different
pitch width.
Removal or rendering inoperative DEF system
components including the DEF tank, dosing
module, dosing supply module, dosing control
unit, NOx electronic module or NOx sensor.
Acts