Ford 2011 F-550 v.1 Manuel d'utilisateur télécharger pdf (Page 303)

Sand

When driving over sand, try to keep all four wheels on the most solid

area of the trail. Avoid reducing the tire pressures but shift to a lower

gear and drive steadily through the terrain. Apply the accelerator slowly

and avoid spinning the wheels.

Avoid excessive speed because vehicle momentum can work against you

and cause the vehicle to become stuck to the point that assistance may

be required from another vehicle. Remember, you may be able to back

out the way you came if you proceed with caution.

Note: If air is released from your tires, the Tire Pressure Monitoring

System (TPMS) indicator light may illuminate (if equipped).

Mud and water

If you must drive through high

water, drive slowly. Traction or

brake capability may be limited.

When driving through water,

determine the depth; avoid water

higher than the bottom of the hubs

(if possible) and proceed slowly. If

the ignition system gets wet, the

vehicle may stall.

Once through water, always try the brakes. Wet brakes do not stop the

vehicle as effectively as dry brakes. Drying can be improved by moving

your vehicle slowly while applying light pressure on the brake pedal.

Be cautious of sudden changes in vehicle speed or direction when you

are driving in mud. Even 4WD vehicles can lose traction in slick mud. As

when you are driving over sand, apply the accelerator slowly and avoid

spinning your wheels. If the vehicle does slide, steer in the direction of

the slide until you regain control of the vehicle.

If the transmission, transfer case or front axle are submerged in water,

their fluids should be checked and changed, if necessary.

Driving through deep water may damage the transmission.

Refer to Transmission temperature gauge in the Instrument Cluster

chapter for transmission fluid temperature information.

If the front or rear axle is submerged in water, the axle lubricant should

be replaced.

After driving through mud, clean off residue stuck to rotating driveshafts

and tires. Excess mud stuck on tires and rotating driveshafts causes an

imbalance that could damage drive components.

Driving

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2011 F-250/350/450/550 (f23)

Owners Guide, 1st Printing

USA (fus)

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Ford 2011 F-550 v.1 Manuel d'utilisateur Page 303

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