Great Plains ADC2220 Operator Manual - Manual (Page 78)

74 ADC2220 Table of Contents Index Great Plains Manufacturing, Inc.
167-073M Table of Contents Index 2012-10-17
3. Watch the seed monitor and adjust fan speed by
increasing or decreasing hydraulic flow from the
tractor. Use the following guidelines and the fan
speed chart at right to properly adjust fan speed.
• Higher fan speeds improve seed distribution, but
high fan speeds also increase the chance of seed
damage and bounce.
• At first, adjust fan speed to the high end of the
range suggested in the chart at right. Watch for
excessive seed cracking and seed bounce from
the furrow, then reduce fan speed if necessary.
• Follow the chart at right as a guide. Actual fan
speeds vary with implement width, row spacing,
seeding rates, seed weights and seed size.
Increase fan speed for heavier seeding rates or
seed. Reduce fan speed for lighter seeding rates
and seed more prone to cracking.
Clutch Lock-Up
In the event of a mechanical or electrical failure of the
clutch of its controlling circuit, the clutch may be
mechanically locked in the engaged mode, with a
user-supplied bolt and nut.
This permits completion of a planting session when
repair or replacement is not an immediate option.
Note: When locked up, meters will continue supplying
seed even with the drill raised. This can plug
primary seed hoses.
For headland turns and short moves without
seeding, stop, and disengage the meter gearbox
clutches.
For longer moves, remove the lock-up bolt.
Refer to Figure 97
1.
Obtain a bolt and nut:
#10, 1
3 ⁄
8
to 1
7 ⁄
8
inches long, or
M5 (5 mm), 3 to 4.8 cm long
2. At the clutch, align the outer case hole with the
hasp welded on the inner case.
3. Insert the bolts and secure with nut.
Recommended Fan Speeds
Seeds Fan RPM
Sunflowers 2250 - 3000
Wheat 3250 - 4000
Soybeans 2750 - 3500
Milo 3250 - 4000
Figure 97
Electric Clutch Lockup
29015
1
2
1 2
1
2