Great Plains ADC2250 Operator Manual - Manual (Page 15)

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Section 2 Operating Instructions
7/28/10 Model 2250 Air Drill Cart 167-033M
Great Plains Mfg., Inc.
Section 2
Operating Instructions
General Description
The seed metering mechanism of this drill is powered by
the cart tire and is driven at a rate proportional to distance
driven. This ensures that the rate applied in pounds per
acre remains constant as ground speed is varied. The
pounds per acre rate is adjustable and can be set using
the gearbox, speed change sprocket and hi-low gears on
the meter. The metering device is driven through an elec-
tro-magnetic clutch which will not engage unless the fan
motor is running at high speed and the implement is low-
ered past an adjustable height switch. This prevents the
primary seed hoses from being plugged by seed being
metered into them without the fan running and also allows
the seed to be shut off automatically when the drill is lifted
on head lands. The seed bins are sealed and held at the
same pressure as the meter chambers so that metering is
controlled mechanically and not by air flow fluctuations.
The metered seed is carried by air through the primary
hoses to the distribution towers on the implement. These
towers then divide the air and seed into individual rows
and it is carried to the openers in the secondary hoses.
Prestart Checklist
•
Lubricate the drill as indicated in the Lubrication portion
of the “Maintenance and Lubrication” section starting
on page 41.
•
Check the tires for proper inflation, see the Tire Inflation
Chart in the “Appendix” section starting on page 54.
•
Check the chains for proper tension and alignment as
shown in the Lubrication portion of the “Maintenance
and Lubrication” section starting on page 41.
•
Perform all beginning of season and daily service items
discussed in the “Maintenance and Lubrication” sec-
tion starting on page 41.
•
Check the drill for worn or damaged parts and repair or
replace them before going to the field.
•
All nuts, bolts and screws should be checked. Refer to
the Torque Value Chart in the “Appendix” section start-
ing on page 54.
Attaching the Drill to the Tractor
Recommended Minimum Tractor Size
For standard openers:
34’ Implement - 180 HP
45’ Implement - 240 HP
For double shoot:
34’ Implement - 225 HP
45’ Implement - 300 HP
NOTE: The tractor must be of adequate size to pull
the drill. When determining size of tractor keep in
mind the soil, terrain, row spacing and type of opener.
!
CAUTION!
The tractor, or towing vehicle, must have adequate unladen
mass to control the drill when towing. Do not exceed 20 miles
per hour.
Minimum vehicle weight - loaded drill:
up to 20 mph maximum - 45,000 lbs.
up to 10 mph maximum - 22,000 lbs.
Minimum vehicle weight - empty drill:
up to 20 mph maximum - 28,000 lbs.
up to 10 mph maximum - 14,000 lbs.
!
DANGER!
You may be severely injured or killed by being crushed between
the tractor and the drill. Do not stand or place any part of your
body between the tractor and drill while hooking up the drill.
Back the tractor drawbar up to the drill until the holes in the
drill tongue and the tractor drawbar are in line. Use the jack
to make height adjustments. Be sure that the hitch is prop-
erly adjusted for level operation, refer to Hitch, Safety Chain,
and Jack in the “Cart Assembly and Setup” section on
page 9. Install the drawbar pin and the pin retainer clip. Re-
move the jack and store on the stob on the tongue center rail
in horizontal position. Attach the safety chain on the drill to
an anchor on the tractor capable of pulling the unit.
!
WARNING!
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin. Check all hydraulic lines and fittings before
applying pressure. Fluid escaping from a very small hole can be
almost invisible. Use paper or cardboard, not body parts, and
wear heavy gloves to check for suspected leaks. If injured, seek
medical assistance from a doctor that is familiar with this type
of injury. Foreign fluids in the tissue must be surgically removed
within a few hours or gangrene will result.
IMPORTANT: When using sealant on pipe threads the fric-
tion between the threads is reduced; therefore, be certain
not to overtighten or damage to the components may occur.
When drawbar pin and safety chain have been installed
NOTE: The tractor must have at least 3 sets of hy-
draulic outlets and be capable of supplying 15-30 gal-
lons per minute at 2000 psi.
NOTE: The SAE o-ring and JIC 37˚ flare type hose
connections do not require sealant for reconnecting.
They do not require high torque for a good seal.