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Valtra N Series |
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Main
NEW! N82 and N92
Engine
Models
Transmission
Hydraulics
Cab
Options Frontloaders
Technical Specifications
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Power
Control
Valtras Power Control system offers unlimited
possibilities for tractor operators.
On HiTech and Advance models, Valtras unique Power
Control system controls transmission and PTO operations. The
system selects the best engagement of the forward-reverse
shuttle, HiShift buttoncontrolled clutch, Powershift gears
and PTO every time whatever the situation. The system also
protects the transmission against excessive or accidental
misuse:
The forward-reverse shuttle does not operate at speeds
over 10 km/h
The handbrake cannot be engaged at speeds over 2 km/h
If a malfunction is detecte |
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Benefits to the driver from the Power Control system:
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Forward-reverse shuttle
Driving directions can be switched using the shuttle lever
without having to use the clutch. The transition is always
smooth and fast, regardless of the load. The shuttle lever
also controls the handbrake. The lever can also be located
on the right on the steering column.
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HiShift
The HiShift button-controlled clutch allows the driver to
change gears or ranges without using the pedal clutch. The
pedal clutch can still be used when extra precision is
needed, for example when connecting implements or
manoeuvring in tight spaces.
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Auto 1 and Auto 2
programmes
The benefits of the Powershift transmission are realised
best in work that requires a lot of shifting. The Powershift
transmission can be operated either manually or by using one
of two automatic programmes. The Auto 1 and Auto
2 programmes change gear automatically when engine speed
goes above or falls below the preset rpm.
Auto 1
By selecting Auto 1 with the rocker switch, the Power
Control system will automatically change the Powershift
gears during work. The system will choose the correct gear
to gain the best performance based on the engines optimum
output and torque characteristics. This automatic programme
is designed for both field and road work. The automatic
selection also work when reducing speed and features a
kick-down function. Auto 1 is ideal for field work, PTO work
and transporting loads.
Auto 2
In Auto 2 the Power Control system will change gear either
up or down according to the conditions preset by the
operator. For specific work conditions the operator can set
the engine revs at which the Powershift will change to
maintain the engine revs at the level chosen by the
operator. Auto 2 highlights the productive and efficient
combination of tractor and implements.
Kick down function
Both Auto 1 and Auto 2 feature a kickdown function similar
to the system found on cars. When the accelerator pedal is
pressed down fast, the system will temporarily shift down to
a lower gear if necessary. The kick-down function
also works when braking.
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AutoTraction
AutoTraction is greatly appreciated by Valtra tractor
drivers. It is ideal for stop -start operations such as
loading, baling, headland turning, transport and verge
trimming. How AutoTraction works:
when the tractor is in gear or the shuttle is engaged and
the revs fall
below 1100 rpm, the tractor will not move
when the revs rise above 1100 rpm, the clutch is engaged
automatically
and the tractor pulls away
when the revs fall below 1100 rpm, the clutch is released
automatically
and the tractor stops
when the operator presses the brakes when the revs are
below 1100 rpm
or forward speed is less than 10 km/h, the clutch is released and the
tractor stops
when the brake pedal is released, the clutch engages and
the tractor
moves off according to the engine speed
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Automatic four-wheel-drive
Valtras 4WD system prevents wheel spin and soil damage. The
system also automatically engages four-wheel-drive for
around one second (adjustable by the operator) when moving
off from rest, changing gears, using HiShift or changing
directions. The system may be deactivated if required. Both
the four-wheel-drive system and differential lock may be
controlled manually or automatically (on-off-automatic).
Differential lock
The differential lock can be switched on manually when
required or used in the automatic mode.The automatic
differential lock measures the speed difference between the
right rear wheel and transmission. It is engaged if
the speed difference is excessive
the wheel slip is excessive
the steering system is close to the centre (not turning).
the brake pedals are not in use
The lock is released as soon as the wheel slip has been
reduced sufficiently, the steering angle is over set value
or the clutch/brake pedal is used.
The automatic differential lock system offers many benefits
for the driver:
increased efficiency
no need to think about 4WD or diff. lock
they are only used when required
not possible to forget they are engaged
provides optimum traction
wheel slip can be monitored on the instrument panel
(option)
avoid soil compaction |
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