Shibaura ST460, Operator'S Manual

Page: 45 / 126

SECTION 2 – OPERATION
2-20
DIFFERENTIAL CONTROL
The differential lock pedal ① is located on the
right-hand foot platform. The differential lock is
used to obtain additional traction in wet or loose
soil. When the differential lock pedal is
depressed, both final drive pinion gear shafts are
locked together, preventing one wheel from
rotating independently of the other. Whenever
one wheel begins to slip in wet or loose soil, use
the lock to obtain additional traction from the
opposite wheel.
WARNING
Steering the tractor is very difficult with the
differential locked.
Do not engage the differential lock when
driving the tractor on the highway, when
ground speed is above 8 km/h, or when
turning the tractor. If the lock is engaged
when turning, a loss of steering control will
result.
To operate the differential lock, depress and hold
the pedal down until the lock is positively
engaged. It is best to engage the lock while the
wheels are turning slowly to minimize shock
loads to the driveline. If a wheel spins at high
speed, such as on ice, reduce engine speed to
idle before engaging the lock or damage may
result. Release the pedal to disengage the
differential lock.
NOTE: In some instances, the lock may remain
engaged after the pedal is released. This can
occur if one rear wheel is turning at a faster
speed than the other. The lock can be
disengaged in one of two ways if this occurs:
Decrease the drawbar pull by raising or
disengaging the implement so that neither
wheel tends to slip.
--OR--
Rapidly apply and release a light braking load
to the slipping rear wheel.