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Valtra 6850 - Analog Inputs; Power Lift; Outside Temp; System Volt

Valtra 6850
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378
Model Code Page
34. Autocontrol ---III
15. 6. 1992
6600E, 8100E
342 8
G. ANALOG INPUTS
Here are given some base values for certain analog inputs. These values were measured from the AC---III unit, which functioned
perfectly:
Power lift (A2C/32):
a) signal is about 194 when the lower links are in the lowest position
b) lower links in max transport height, signal is about 014.
--- if the signal values are correct everything is OK.
--- if no signal comes or its deviates much from values above, check then connectors and wiring. Fault can also lie in the hydraulic
power lift electronics.
Outside temp (A2C/29):
a) signal is about 130 at outside temperature of ---3˚C
b) signal is about 120 at outside temperature of +1˚C
N.B. Signal value decreases when temperature rises.
--- if the signal values are correct everything is OK.
--- if no signal comes or its deviates much from values above, the sensor is faulty or its wiring and connectors.
Coolant temp (A2C/30):
a) signal at coolant temperature ---2˚C is about 183.
b) signal at coolant temperature 15˚C is about 130.
c) signal at coolant temperature 20˚C is about 116.
d) signal at coolant temperature 25˚C is about 108.
e) signal at coolant temperature 40˚C is about 084.
f) signal at coolant temperature 50˚C is about 064.
--- if the signal values are correct everything is OK.
--- if no signal comes or its deviates much from values above, the sensor is faulty or its wiring and connectors.
System volt (A2C/25):
a) signal value is about 167, when the engine is running at 1000 r/min (correspond voltage ~ 13,5 V).
b) signal value is about 140, when the engine is stopped (correspond voltage ~ 12 V).
--- If the signal values are correct, everything is OK (values depend also on condition of battery)
--- If no signal comes or it is faulty, check connectors and wiring.
Acc pedal pos (A2C/7):
a) signal is about 020 when the acc. pedal is in the upper position.
b) signal is about 230 when the acc. pedal is in the lower position.
--- if the signal values are correct, everything is OK
--- if no signal comes or it is faulty, check the potentiometer on the injection pump and its wiring.
Checking injection pump potentiometer, see page 341/2.
Checking temperature sensors, see page 341/2.

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