27
Before starting the calibration test, check:
The power transmission cassette setting, I or II (Figs. 22 and 23)
The position of the bottom flaps (seed and fertilizer)
The seed feed amount set on the hand-wheel
The fertilizer feed amount set on the hand-wheel
That the cover doors on both fertilizer and seed sides are fully open
That there is seed and fertilizer in the containers
That the tire track device is not active
The machine is slightly lifted from the ground, meaning that the feed equipment can be rotated with the
machine ground-wheel, see Fig. 29. Rotation is achieved with a crank pin located under the cover on the
right side of the machine. Note that the machine must be balanced horizontally.
Tume JC drills are fitted with calibration test troughs as standard on both the seed and fertilizer sides, see
Fig. 30. You can retain both troughs in position during sowing. However, always remember to empty the
troughs of dust etc before carrying out any calibration test.
The machine tubes (for both seed and fertilizer) must be set to the calibration test position simultaneously.
This is done using the handle on the right side of the machine, see Fig. 30 position A.
The calibration test can be carried out in 3 different ways:
Simultaneously for both the seed and fertilizer, when the power transmission is in sowing position,
in other words the ring pin on the fertilizer feed shaft is in the inner hole, see Fig. 27.
Separately for seed, then the ring pin is removed from fertilizer shaft, see Fig. 27.
Remember to
put it back.
Separately for fertilizer, in which case the ring pin is in the inner hole, see Fig. 27, and the power
transmission cassette is removed, see Fig. 30.
Remember to replace the cassette following the
calibration test.
Figure 29. Calibration test.
