600 800 1000 1200 1400 1600 1800 2000 2200 2400
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
Accelerator pedal position
Engine revs rpm
Change down
Change up
Picture 11. Delta Powershift control
424
Model Code Page
35. Autocontrol IV
1. 1. 1995
6600E
8100E-- 8750E
351 6
1. 1. 1994
C. Delta Powershift
(the gear has three ratios)
--- Depress the Delta PS rocking switch rear edge: Manual
mode.
--- Start the engine. The lowest ratio should be on, at which
time one ind. light lights in the dashboard.
--- Drive the tractor and press the push buttons in the gear
lever knob. The front button changes one step down-
wards and the rear one step upwards.
--- The lowest ratio: one ind. light, direct ratio: two ind. lights,
highest ratio: three ind. lights.
--- Engage the highest ratio, stop the engine and switch off
current. A buzzer alarms if the parking brake is not
applied. Start the engine and the lowest ratio should be on
=oneind.light.
Note! The continuous pressing of the buttons changes
only one step up or down. In the highest or lowest ratio, the
pressing of the button of direction in question does not
change ratio any more.
--- Depress the Delta PS rocking switch front edge (Auto-
matic mode).
--- Select gear H1 and start driving and raise engine revs with
the hand throttle lever
--- The Delta PS ratio changes automatically upwards when
the accelerator pedal position is over 1900 rpm. The
change happens at 50---200 rpm lower than the acceler-
ator pedal position. Follow the ind. lights.
--- When the highest ratio is on, depress the together latched
brake pedals. The AC IV starts to change down when the
loading increases and the engine revs lower. The change
down occurs when the engine revs fall 250---400 rpm (at
higher revs a larger drop in revs is allowed) lower that the
accelerator pedal position supposes (increased loading).
--- Releasethebrakepedalsandwhentheenginerevsstart
to rise, the system changes automatically up.
--- Press the push buttons at which time the ratio is changed
temporarily but the AC IV changes the ratio as soon as the
loading conditions require it.
--- Depress the clutch pedal and stop the tractor. The AC IV
will change automatically to the lowest ratio.
--- Stop the engine. The buzzer alarms. Apply the hand brake
and the buzzer sound extinguishes
Note! If the gear change functions in the manual mode but
not in the automatic mode, this indicates that the ECS is
faulty or automatic mode components (e.g. fuel injection
pump potentiometer, engine speed sensor) are faulty or
wiring has poor contact. To check the DPS solenoids, see
page 440/13.
Calibrating the Delta Powershift
The calibration is carried out in the same way as on AC III,
see page 341/5. However, the lowest engine calibrating
revs are 800 r/min (or min. revs) and the highest engine
calibrating revs are 2200 (or max. revs).
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