New Holland T4.105F, Operator'S Manual

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6 - WORKING OPERATIONS
DIFFERENTIAL LOCK
Electrohydraulic differential lock
DANGER
Steering is difficult with the differential lock engaged. An accident could result.
During field operation, use the differential lock for traction improvement but release for turning at row
end. Do not drive at high speeds or on roads with the differential lock engaged.
Failure to comply will result in death or serious injury.
D0023A
The differential allows the drive wheels to rotate at differ-
ent speeds when the tractor is turning.
The differential is fitted with an electro-hydraulic locking
device, operated by switch
(1) ;
• Figure
1 models without cab
• Figure
2 models with cab.
To activate differential locking, put the switch (1) into po-
sition (A) . When the switch is released, it returns to the
middle position B .
NOTE: If the switch is in position (C) , to activate the differ-
ential lock it is necessary to move onto the middle position
(B) and put it into position (A) .
Differential lock engagement is highlighted
with the amber warning light on the
instrument panel coming on.
To disengage the differential lock, reduce the tractor
speed and put the switch
(1) into position (C) . The switch
remains held in position (C) .
The differential lock is also disengaged when pressing the
brake pedals.
MOIL13TR01001AA
1
MOIL13TR00466AA
2
It is advisable to lock the differential in the following situations:
• When ploughing, to prevent the wheel that is not in the furrow from slipping.
• When one of the drive wheels is on uneven, muddy or slippery ground and tends to slip.
NOTICE: If the differential fails to disengage, momentarily press the footbrake that acts on the outside directional
wheel.
NOTE: Only lock the differential in the event of one of the two wheels slipping excessively. Do not keep the differential
locked unnecessarily as this wastes power and can cause damaging stresses in the transmission system, tyre wear
and steering problems.
6-2