4. Remove the jumper cable from the positive (+) terminal of the
disabled vehicle’s battery.
After the disabled vehicle has been started and the jumper cables
removed, allow it to idle for several minutes so the engine computer can
relearn its idle conditions.
WRECKER TOWING INSTRUCTIONS
Before moving the disabled vehicle, check for adequate road clearance of
vehicle components. It is recommended the disabled vehicle be unloaded
prior to being towed to reduce any abnormal load to the vehicle
components resulting from the towing procedures. Before towing, be sure to
fully release the parking brake. The spring-actuated type parking brake can
be reset by recharging the air system with at least 64 psi (441 kPa) of air. If
the brake system does not retain air pressure, then the spring brakes must
be released manually. Refer to Parking brake in the Driving chapter.
Note: For towing, make sure the vehicle is securely connected to the
tow vehicle and the tow vehicle’s parking brakes are applied before
releasing the disabled vehicle’s spring brakes.
WARNING: To reduce the risk of personal injury or property
damage when manually releasing the spring brakes, be sure to
block the wheels so the vehicle cannot move once the brakes are
released.
Towing the vehicle with the front wheels suspended
When it is necessary to tow a vehicle with the front wheels suspended, extra
precautions must be taken to avoid transmission or differential damage:
• Remove the axle shafts from the axle assembly to prevent the wheels
from driving the differential and the transmission.
• The wheel hub ends must be covered to prevent loss of axle lubricant
and entrance of other contaminants. If the axle shafts are not
removed, removal of the driveshaft is required.
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Roadside Emergencies
166
2012 F-650/750 (f67)
Supplement, 2nd Printing
USA (fus)
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