Great-plains YP825AR Operator Manual User Manual Page 52
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48 YP825AR Table of Contents Index Great Plains Manufacturing, Inc.
401-923M Table of Contents Index 2014-06-17
Fan General Operating Information
Adjust the fan to provide the meter pressurization
recommended for the seed disk, seed, and seed density.
See the tables and charts for recommended values in
the Seed Rate Manual.
Normal gauge readings are in the 0.8 to 4.0 inches of
water pressure range, and vary considerably with crop.
Refer to Figure 51
Use tractor remote hydraulic valve flow control to set fan
speed and butterfly valve adjustment to make fine
adjustments to meter pressurization. Precise technique
depends on tractor capabilities:
• The objective is to obtain recommended meter
pressurization, and maintain it during end-of-pass
marker fold, lift and turn.
• For any setup adjustment, operate the tractor engine
at typical field rpms, and not at idle.
• Preset the butterfly valve. Use any setting that you
previously developed for the crop/disk/range (see Note
at right), otherwise:
If the tractor has fine control of remote flow rates, and
consistent flow at varying tractor engine rpm, initially
set the butterfly valve to 30° or less.
If the tractor has only coarse control of flow, initially set
the butterfly valve to 45°.
• Set the fan circuit flow to bring the gauge reading to
near the recommended value.
• Fine tune the meter pressurization with the butterfly
valve.
• If the tractor has marginal flow available, or the list
circuit has priority, you may need to experiment with
combinations of fan flow and butterfly valve settings.
Always start the fan with a low flow setting.
Gradually bring fan up to the recommended initial meter
pressurization.
At excessive rpm, too much air flow can cause:
• oil heating
• slow lift times
If desired pressure cannot be reached, or require
unusually high oil flow at low butterfly valve settings,
chances are the fan is running backwards. Reverse the
inlet/return lines at the hitch.
90
60
30
0
848-020C
Butterfly Valve Operation:
To adjust, loosen bolt and rotate the handle .
Re-tighten bolt.
0° is wide open - maximum air flow.
90° is closed - minimum air flow.
The valve provides the most effect at settings between
20° and 70°.
Starting at 30° reduces the fan workload.
Starting at 45° provides the most adjustment range up or
down.
Note: You may find that different crop, seed disk and rate
range combinations need different valve settings.
If so, make a note of the valve angle on the chart
in the Seed Rate manual.
Figure 51
Fan Butterfly Valve Handle
25137
1 2
1
2
20°
45°
70°
Low Population Risk at Turns:
Unless the PTO pump accessory is installed, the fan requires
up to 4.5 gpm. This figure does not include oil for lift/lower or
oil for marker operation. Aggressive lift/lower operations, and
simultaneous lift/marker operations, can reduce fan rpm below
that needed to pressurize meter disks. If seed falls out of
pockets, low population bands will occur shortly after turns.
Unless the tractor has generous oil flow capacity, raise/fold
markers before lift, and lift slowly. Watch meter pressurization
and tune operations to keep it at planting levels in turns.
- Operator Manual 1
- Table of Contents 3
- Important Safety Information 5
- Wear Protective Equipment 6
- Avoid High Pressure Fluids 6
- Use A Safety Chain 7
- Keep Riders Off Machinery 7
- Use Safety Lights and Devices 7
- Transport Machinery Safely 7
- Shutdown and Storage 8
- Tire Safety 8
- Handle Chemicals Properly 8
- Practice Safe Maintenance 9
- Safety At All Times 9
- Safety Decals 10
- READ BEFORE USING TANK 11
- EXCESSIVE SPEED HAZARD 12
- 848-801C 14
- Introduction 15
- Using This Manual 16
- Owner Assistance 16
- Preparation and Setup 17
- Hitching Tractor to Planter 18
- Hydraulic Hose Hookup 20
- Air Source Setup (Option) 21
- Leveling Planter 22
- Monitor Setup 24
- Marker Setup (Option) 24
- Lock Up Fertilizer Drive 25
- Operating Instructions 26
- Transport 27
- Transport Steps 28
- Color Function 29
- CLOSED OPEN 30
- Unfolding/Folding the Planter 31
- 34702-04 34
- Field Lift/Lower 39
- Marker Operations 40
- Loading Materials 41
- Loading Seed, continued 42
- Air System Operation 49
- 848-020C 52
- Meter Operation 53
- Field Set-Up Checklists 54
- Field Operation 55
- Short-Term Parking 56
- Long-Term Storage 56
- Adjustments 57
- Setting Material Rates 58
- Marker Adjustments (Option) 59
- Fan and Gauge Adjustment 60
- Single-Row Augers 64
- Row Implement Adjustments 66
- Row Unit Down Pressure 70
- UMC Coulter Adjustments 73
- Side Gauge Wheel Adjustment 76
- Row Unit Shut-Off 82
- Seed Firmer Adjustments 84
- Troubleshooting 87
- Seed Pool Troubleshooting 88
- Problem Cause Solution 89
- Population Too Low 90
- Population Too High 91
- Population Related 93
- General Troubleshooting 94
- Maintenance and Lubrication 99
- Material Clean-Out 100
- Liquid Fertilizer Clean-Out 102
- Dry Fertilizer Clean-Out 103
- Hydraulic Maintenance 109
- As Required 112
- 25474 25475 116
- Seasonal 118
- Seed Lubricants 120
- Seed Monitor 121
- Seed Meter Drive 121
- PTO Pump 122
- Speed Radar 124
- Liquid Fertilizer System 124
- Dry Fertilizer System 125
- Dual Sequenced Markers 126
- Frame-Mounted Row Accessories 126
- Terra-Tine™ 127
- Row-Mounted Accessories 128
- Unit-Mounted Disk Coulters 129
- Seed Meter Disks 129
- Inside Disk Scrapers 130
- Gauge Wheel Scrapers 130
- Seed Firmers 130
- Row Unit Press Wheels 131
- Lock-Up Pins 131
- Seed Lubricant 131
- Clean-Out Container 132
- Seed Tube Brush 132
- Specifications and Capacities 134
- 70 and 75 cm Models 135
- Dimensions 136
- Field Dimensions 137
- Torque Values Chart 138
- Tire Inflation Chart 138
- Plumbing Diagrams 139
- Hydraulic Diagrams 140
- Chain Routing 149
- Twin Row Single Row 151
- 15T, 47T 152
- 25AP: Meter Drive (Mid type) 153
- 25AP: Meter Drive (Rear type) 153
- Appendix C - Initial Setup 154
- Marker Extension 155
- 122-278S Scraper Installation 158
- NOZZLE SHUT OFF CAP W/ GASKET 159
- Table of Contents Index 165
- Salina, Kansas 67402-5060 USA 166
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