Ford F-650 2025 Owner's Manual page 152

Normal Driving Position
E210343
System Park
E210344
With both knobs (A and B) pushed in
(normal driving position), the parking
brakes for both the tractor and trailer can
be applied by pulling the parking brake
knob (B) out, exhausting air from the
tractor spring brakes, simultaneously
causing the trailer air supply valve to pop
out, applying the trailer brakes.
2025 F-650/750 (TBC) , enUSA, Edition date: 202310, First-Printing
Brakes
Push in both knobs (A and B) to supply air
to both trailer and tractor spring brakes,
releasing all brakes.
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