Great Plains CTA4000 Operator Manual - Manual (Page 19)

17
Section 2 Operating Instructions
2/1/06 CTA4000 Air Drill Implement 160-269M
Great Plains Mfg., Inc.
Weight Transfer
While seeding, weight is hydraulically transferred from the
center section to the wings so all frame sections run at the
same depth. If not enough weight is transferred, the wings
will run higher than the center section.
To adjust weight transfer, refer to Figure 2-7.
1. Check that both selector valves (1) are turned to field
position.
2. Lower openers to ground.
3. Watch pressure gauge (2) while turning pressure-con-
trol valve (3). When facing the valve,
•
turn clockwise to increase weight on wing sections,
•
turn counterclockwise to decrease weight on wings
sections.
Typical pressures on gauge should be 200 to 600 psi.
Figure 2-7
Down-Pressure Valve and Gauge
4. When satisfied with gauge reading, raise openers
while watching pressure gauge. Gauge reading
should drop as the openers are raised.
Marker Operation
If you purchased markers, the following will help you inte-
grate markers into the air-drill hydraulic system. Carefully
read marker manufacturer’s instructions for safe installa-
tion, operation and adjustment.
Marker attachments are controlled by same hydraulic cir-
cuit as cart auger. To operate markers, move hydraulic
diverter valve up to marker position as shown in Figure 2-
8. The diverter valve is located on the cart tongue.
IMPORTANT: Do not exceed 800 psi. Exceeding 800
psi could result in equipment damage.
17163
1
1
3
2
Connect marker hoses to outlets A and B at rear of cart.
Figure 2-8
Auger/Marker Hydraulic Diverter
Transporting
!
DANGER!
Electrocution hazard. To prevent serious injury or death from
electric shock, keep clear of overhead power lines when trans-
porting, folding, unfolding or operating all air-drill compo-
nents. Machine is not grounded. Electrocution can occur
without direct contact.
!
WARNING!
Towing the implement at high speeds or with a vehicle that is
not heavy enough can lead to loss of vehicle control. Loss of ve-
hicle control can lead to serious road accidents, injury and
death. To reduce the hazard:
• Do not exceed 20 mph.
• Do not tow a drill that, when fully loaded, weighs more than
1.5 times the weight of the towing vehicle.
!
WARNING!
The implement is designed to hitch to a Great Plains air-drill
cart only. Hitching the implement to any vehicle other than a
Great Plains air-drill cart will create an unstable towing load
and can lead to road accidents, injury and death. To avoid the
hazard, transport the implement only when hitched to a Great
Plains air-drill cart.
Before transporting the implement, check and practice the
following items.
Minimum Towing Vehicle Weight
Hitched to ADC2220: 21,400 pounds
Hitched to ADC1150: 17,840 pounds
16221
Auger
Markers