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7.10 Use of the Differential
lock
Observe the following precautions when applying the
differential lock.
1. Apply the differential lock moderately. Limit its use
to the below situations.
• When the tractor enters or leaves the farm field, it
cannot move straight because of excessive indi-
vidual wheel-spin under difficult or slippery field
conditions.
• One rear wheel is caught in a loose area of the
field and the tractor cannot move due to wheel-
spin.
• In the cases of plowing, the rear wheel closer to
the ridge is caught in the loose soil and is af-
fected by wheel-spin.
2. Always reduce engine speed when engaging the
differential lock.
3. The use of the differential lock must be limited to a
particular period of time and cannot be applied be-
yond that limit.
4. When the rear wheel is subjected to excessive
loads, even releasing the pedal sometimes may
not unlock the differential although the pedal
springs back. Should the differential not unlock
when turning the tractor, lightly step on the brake
pedal opposite to the turn side or turn back the steer-
ing wheel and run the tractor straight. By doing so,
the differential can be unlocked. If the brake pedal
of the turn side is depressed during turning, the
differential lock system takes on an undue load. Be
careful about such an improper operation.
IMPORTANT :
• Never use the differential lock when turning the trac-
tor. When engaged, the differential lock will pre-
vent the tractor from turning.
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