Great Plains CTA4000 Operator Manual - Manual (Page 18)

16
Section 2 Operating Instructions
CTA4000 Air Drill Implement 160-269M 2/1/06
Great Plains Mfg., Inc.
3. Set opener seeding depth by adjusting press-wheel
height. To adjust, first raise openers slightly, then lift
and slide T handles on top of openers as shown in Fig-
ure 2-6. Adjust all press wheels to the same height.
•
For more shallow seeding, slide T handles toward
implement.
•
For deeper seeding, slide T handles away from im-
plement.
While seeding, remember:
•
Raise openers before turning. Never back up or turn
sharply with openers in the ground. Doing so will plug
openers and may damage equipment.
•
Be aware of the 5- to 10-foot delay needed for seed to
reach openers. If you stop in middle of field, lift drill and
back up 10 feet before proceeding.
•
Check periodically for plugged openers and hoses. With
fan running and drill raised, hand crank metering sys-
tem. Look below each opener for seed or fertilizer.
•
You can adjust the opener height at which seed meter-
ing beings. Refer to Electric Clutch Switch Adjustment,
“Adjustments,” page 21
•
For information on opener adjustments, see Opener
Down Pressure and Opener Depth, “Adjustments,”
starting on page 19. For more information on trouble-
shooting opener problems, see “Troubleshooting,”
page 23.
Figure 2-6
Press Wheel Adjustment
15659
Fan Operation
!
WARNING!
Operate implement only when hitched to a Great Plains air drill
cart. Modifying the implement for use with other machines
could lead to field or road accidents, serious injury or death.
For normal seeding operations:
1. Check that in-cab rocker switch is on.
2. Check that both selector valves are in field position.
See Figure 2-2.
3. Energize tractor hydraulics for fan. Lock hydraulic
lever in place for continuous operation. See step 1,
Opener Operation, page 15, for locking instructions.
4. Run fan for at least 15 minutes before seeding.
Hydraulic fluid must be warm before fan will operate
properly.
5. Watch monitor and adjust fan speed by increasing or
decreasing hydraulic flow from tractor. Use following
guidelines to properly adjust fan speed.
•
Follow the fan speed chart as a guide. Actual fan
speeds will vary with seeding rates, seed weights
and seed size. Increase fan speed for heavier seed-
ing rates or seed. Reduce fan speed for lighter seed-
ing rates and seed more prone to cracking.
•
First adjust fan speed to high end of range suggest-
ed in fan speed chart. Watch for excessive seed
cracking and seed bounce from furrow, then reduce
fan speed if necessary.
•
Higher fan speeds improve seed distribution and
help prevent seed hoses from plugging. At heavy
seeding rates, you can run fan at up to 4,900 rpm.
Fan Speed Chart
6. Pull forward, lower openers and begin seeding. If
metering system does not turn off and on as openers
are raised and lowered, refer to Electric Clutch Switch
Adjustment, “Adjustments,” page 21.
7. When finished seeding, turn in-cab rocker switch off.
Seeds Fan RPM
Sunflowers 2,250 - 3,000
Wheat 3,250 - 4,500
Soybeans 3,200 - 4,300
Milo 3,250 - 4,000