430
Model Code Page
35. Autocontrol IV
1. 1. 1994
6600E
8100E-- 8750E
352 4
B. Delta Powershift control
Input signals (DIGITAL INPUTS).
--- The Service program does not show the input signals from the A/M ---switch or push buttons to the Powershift control unit A10
(concerning control unit A10, see Autocontrol II under code 311). The push buttons and the ind. lights should be checked by driv-
ing the tractor and by engaging the different ratios of the Delta Powershift, see page 351/6.
--- The AC IV automatics change the Delta Powershift lowest ratio (one ind. light), when the clutch pedal is depressed and the
tractor driving speed is below 1,5 km/h. The input signals from the clutch pedal to the ECS should be as follows:
MAIN CLUTCH (A2C/18) 1 0
Clutch pedal (U=Up, D=Down) U D
--- Input signals from the radar and the gearbox speed sensor to the ECS can be checked with the calibrating drive, see page 351/2
or see instruction F on page 352/7. Checking the engine speed sensor and the fuel injection pump potentiometer, see pages
351/3---4 or pages 352/7---8.
Output signals from the ECS (DIGITAL OUTPUTS).
Note! Before test, ensure that it is 0 in points PS Downwards and PS Upwards. If it is E in these points, stop the engine and switch
off current to the PC and restart then engine and the PC. Ensure that the Powershift A/M ---switch is in A position (front edge down).
PS DOWNWARDS (A1C/36) 1 only flashes when the gear ratio is changing automatically down,
but is 0 after that.
PS UPWARDS (A1C/2) 1 only flashes when the gear ratio is changing automatically up, but is
0 after that.
--- the automatic change up happens when the tractor is driven and the engine revs are increased with the hand throttle lever. When
the highest ratio is on (three ind. lights), depress both brake pedals and the AC IV starts to change down.
--- If the marks above agree with the PC display, but the gear ratio change does not happen, the fault lies in the Powershift solenoid
valves or in their wiring or PS control unit A10 is faulty. In this case the ratio doesn’t change in the manual control either.
--- If the output signals from the ECS lack, the ECS is faulty (inputs should be correct).
C. Differential lock control
Input signals to the ECS (DIGITAL INPUTS)
DL A/M (A2C/8) 0 0 1
DL MANUAL 1/0 (A2C/33) 0 1 0
A / M --- S W I T C H (M
1
=rear edge down,
M
2
=middle position,A=front edge down
M
1
M
2
A
BRAKE LEFT (A2C/9) 0 1 0
BRAKE RIGHT (A2C/19) 0 0 1
LEFT BRAKE PEDAL (U=up, D=down) U D U
RIGHT BRALE PEDAL (U=up, D=down) U U D
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