Case 580SR Service Manual page 169

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SECTION 21 - TRANSMISSION 103
Powershift transmission
In the previous paragraphs shift changes have been
shown as precise movements and twist actions of
the powershift lever. However the transmission can
change gear automatically in forward or reverse as
described in the following paragraph:
Select the 4th forward gear with the powershift lever;
then, with the parking brake disengaged, press the
accelerator pedal. As the engine revs and machine
speed increase the transmission will start from 2nd
gear and change up through 3rd and 4th gears up to
maximum road speed. When you require to slow
down or stop release the foot accelerator and apply
the foot brake, the transmission will automatically
downshift through 4th, 3rd and 2nd gear as the ma-
chine speed decreases. Once stopped, engage the
parking brake; now the neutral position will be select-
ed by the microprocessor. To start travelling again,
simply twist the handgrip to select the 4th gear and,
with the parking brake disengaged, press the accel-
erator pedal.
Kickdown
The kickdown facility (2nd to 1st gear only) on this
transmission increases torque instantly to the driving
wheels and hence pushing power. For example
when the loader is pushing into a pile and more
torque is required at the wheels. This is achieved by
the instant gearshift from 2nd to 1st by the use of the
button (1) without the need to use the twist grip on
the powershift lever.
NOTE: the kickdown function is available only when
the transmission is in 2nd gear and the appropriate
button (1) is pressed. If downshifting is impossible
(machine speed too high), the LED 1 is on and the
LED 2 flashes.
Transmission disconnection
The disconnect feature is useful when loading, for
example; when pushing the loader into a pile and you
have sufficient dirt in the bucket press the disconnect
switch (1) which disengages the transmission and al-
lows the full power of the engine to be directed to the
hydraulic oil pump. Disconnect is available in 1st and
2nd gear.
NOTE: transmission disconnect is selectable, when
the machine speed is less than 5 km/h and by de-
pressing the button on the loader lever and remains
active until the pedals or switch are released.