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DEF tanks
Leaks
Driveshaft
Exhaust system
Frame
Air hoses and electrical
lines
Deck plate
Turns signals, brake
lights and flashers
Lights and reflectors
2025 F-650/750 (TBC) , enUSA, Edition date: 202310, First-Printing
Vehicle Inspection Guide
Diesel Exhaust Fluid (DEF) area
Verify the tanks and caps are secure and that there are no
leaks from the tanks.
Inspect for leaks from the tanks.
Underbody
Verify that the driveshaft is not bent or cracked and that all
driveshaft couplings are secure.
Verify that the visible outside parts are securely mounted and
that there are no cracks, holes or severe dents.
Inspect for cracks or bends in longitudinal frame members.
Verify there are no loose, cracked, bent, broken or missing
crossmembers or crossmember fasteners.
Rear of vehicle
Verify there are no cuts, cracks, chafing or wear on the air
hoses and electrical line insulation. Listen for audible air leaks.
Verify air and electrical lines are not tangled, crimped or
pinched or being dragged against any truck parts. None of
the air or electrical line should be spliced or taped.
Inspect for corrosion on pins and in electrical sockets to verify
continuity and reduced heat build-up potential.
Verify the deck plate is clean, bolted securely to the frame
and is clear of loose objects.
Verify that both brake lights illuminate when the pedal is
applied, each signal flashes and that the four-way flashers
work properly.
Verify all exterior lights illuminate and are clean.
Verify reflectors are clean, unbroken and of proper color (red
on rear, amber elsewhere).
Verify running lights are clean and unbroken.
Note: Inspect rear running lights separately from signal,
flasher and brake lights.
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