Ford 2014 F-550 v.1 Manuel d'utilisateur télécharger pdf (Page 150)

USING FOUR-WHEEL DRIVE

WARNING

For important information regarding

safe operation of this type of vehicle,

See General Information (page

254).

Note: Do not use 4X4 mode on dry, hard

surfaced roads. Doing so will produce

excessive noise, increase tire wear and may

damage drive components. 4X4 mode is

only intended for consistently slippery or

loose surfaces.

Note: If 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 operation.

Manual Shift On Stop (MSOS)

4WD system (If Equipped)

Note: 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.

Note: 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.

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The 4WD system is engaged or disengaged

by rotating the control for both front wheel

hub locks from the FREE or LOCK position,

then manually engaging or disengaging the

transfer case with the floor-mounted

shifter. For increased fuel economy in 2WD,

rotate both hub locks to the FREE position.

Electronic Shift-On-the-Fly

(ESOF) 4WD system

Note: If 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.

Note: Auto-manual hub locks can be

manually overridden by rotating the hub lock

control from AUTO to LOCK.

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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.

The ESOF 4WD system:

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Super Duty (TFA)

Four-Wheel Drive (If Equipped)

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