Data entry procedure
All numerical data is entered by the same procedure as detailed below:
a/ Select the programme function to be checked or altered by pressing the appropriate button on the
overlay card. The LH display will show the numerical value currently stored for that function.
b/ If the value is correctly set then no further action is required. Simply select the next function to check
or switch the ignition off to return to operating mode.
c/ To set a new value use the top row of buttons as numerical entry keys . Key in the number, as the first
key is pressed the number will flash in the LH display and the RH display will flash "Ent". As the full
number is keyed in, it will all appear in the LH display. Each key press is acknowledged with an audible
beep.
d/When the number is correctly set, press "Enter" to confirm the entry. The display will then stop flashing
and the new data value is displayed in the LH window.
If you enter your value incorrectly, simply press "Enter" at any time and then enter the value again.
Data values
Wheel calibration 1 & 2
The data value to be set on these functions is the distance the vehicle travels forwards over 2 intervals
between speed sensor pulses.
This data must be determined under practical operating conditions to allow for any wheel slip, sinkage or
tyre deformation.
The Agribuggy is fitted with a propshaft speed sensor and the data programmed is the distance the
machine travels forwards for two revolutions of the prop shaft. Determine this distance by driving the
machine forwards for exactly 20 revolutions of the prop shaft, measure the distance travelled and divide
this distance by 10 to determine the true "speed sensor factor" or distance travelled between 2 sensor
pulses.
The following settings are the factory settings and are only approximate. The machine should be
re-calibrated before use and the new settings recorded for future reference.
Tyre size
Metric factor (metres)
Imperial factor (inches)
38x20x16 low pressure
0.891
35.10
12.4 x 16 intermediate
0.905
35.63
9.5 x 24 intermediate
1.06
41.76
7.2 x 36 row crop
1.207
47.53
8.3 x 36 row crop
1.28
50.43
7.2 x 40 row crop
1.347
53.04
An alternative method of calculating the wheel factor, although not as accurate, is as follows:
Measure the distance from the ground to centre of the axle whilst in working conditions and approximately
half loaded. Multiply this figure by 2.04 to get the wheel sensor factor.
Operating - ICM
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