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Fig. 6 Three-point suspension system of the tractor's three-point hitch: 1,2 - lower links, 3 - upper
fastener, 4 - left suspension, 5 - right suspension with adjustable length, 6 - lift arm, 7 - lift shaft
When attaching the SAL disc harrow to the tractor, do the following:
•
switch the tractor's hydraulic system to position control,
•
remove the lower link pins if the tractor's three-point hitch is not equipped with
hitching hooks,
•
carefully back up, suspend the machine from the lower links, then secure,
•
connect the upper link on the tractor (on units not equipped with a trolley) -
when the unit is running, the attachment point of the upper link on the machine
should be higher than the attachment point of this link on the tractor,
•
check the lifting and lowering of the pre-seed unit and the operation of the
hydraulic system.
Any tractor that is used with the machine must be equipped with a set of weights
and must remain steerable during transport, i.e. a minimum of 20% of the tractor's
weight must be on the front axle.
4.3 Coupling the seed drill to the disc harrow
Before suspending the seed drill, familiarise yourself with the weight of the drill
including the seed. The load capacity of the hydropack is 1,300 kg. When coupling the
seed drill to the disc harrow, do the following:
•
match the spacing of the towing hooks to the spacing of the seed drill pins by
placing a hook on the appropriate side of the arm and shimming the spacer plate
accordingly,
•
lower the lower links of the hitch below the hitching pins of the seed drill (in the
case of a trolley hitch, insert a pin into the appropriate hole in the hangers of the
hitch, then adjust the position with a cylinder),
•
reverse the set so that the seed drill pins are in the hooks,
•
insert the safety device into the pins, hole in the hooks and secure with a safety
pin,
•
connect the top link to the seed drill.
NOTE! Before raising the disc harrow, the seed drill must be raised for the
stability of the unit.