Ford 2011 F-550 v.1 Manuel d'utilisateur télécharger pdf (Page 294)

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101

turn the hub locks completely clockwise; to disengage the hubs

(FREE), turn the hub locks completely counterclockwise.

• The vehicle should not be driven in 4X4 High or 4X4 Low

modes with the hub locks set to FREE as this condition may

damage driveline system components.

• Some vehicles may be equipped with wheel ornaments that cover the

4x4 manual hub lock. These ornaments must be removed to access

the manual hub locks.

Electronic Shift On the Fly (ESOF) 4x4 system (if equipped)

If equipped with the electronic shift 4WD system, and 4X4 Low is

selected while the vehicle is moving above 3 mph (5 km/h), the

4WD system will not perform a shift. This is normal and should be

no reason for concern. Refer to Shifting to/from 4L (4X4 Low) for

proper system operation.

The ESOF 4WD system:

• provides 4x4 High engagement and disengagement while the vehicle is

moving.

• is operated by a rotary control located on the instrument panel that

allows you select 4x2, 4x4 High or 4x4 Low operation.

• uses auto-manual hub locks that can be engaged and disengaged

automatically based on the 4x4 mode selected.

• auto-manual hub locks can be

manually overridden by rotating

the hub lock control from AUTO

to LOCK if desired.

• automatic operation of the

hub locks is recommended, and

will increase fuel economy

• For proper operation, make

sure that each hub is fully

engaged and that both hub

locks are set to the same position (both set to LOCK or both

set to AUTO). To engage LOCK, turn the hub locks completely

clockwise; to engage AUTO, turn the hub locks completely

counterclockwise.

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 294

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