FARMTECH FDD 3000, Manual

Page: 46 / 105

C.1.2.2 Throttle, Throttle Adjustment
and Throttle Resetting
C.1.2.2.a. Throttles
Throttle
Throttle Elements
Gear (on top) and Throttle (on
bottom) View
Throttles are inclined components in suitable shape
transmitting the seed and fertilizer entering the box to the
sheave (gear). Its duty is to enable gears to flow regularly
and uniformly and to protect the limited seed against
being damaged by the gear. It is designed in a flexible
structure to avoid compression of the coarse seeds and
fertilizers between the sheave (gear) and itself. Throttles
are connected to the throttle shaft and they are adjusted
via throttle adjusting arm on this shaft.
Also, the duty of discharging the seeds and fertilizer
remaining in the box belongs to the throttles.
Throttle adjustment is determined according to the size
of the seed to be planted.
Thus, the throttle adjusting arm should be switched to
following positions,
to the position A (closed) on the scale for very small
seeds in
0.5
– 2.5 mm
size such as canola, spinach,
poppy, clover, black cumin and sesame,
to the position B during the planting of medium seeds in
2.5
– 4.5 mm size
such as wheat, common vetch,
Hungarian vetch,
to the position C for medium
– coarse seeds in
4.5
– 7
mm size such as coarse wheat, triticale, rye and barley,
For coarse seeds in sizes above 7 mm such as chick
pea, barley with awn and oat, it should be switched to C
or D, whichever is suitable for the seed structure.
Important: The ideal throttle adjustment is that the
seeds pass between the gear and throttle without
jamming but the seed flow is cut when the gear
stops.