A seed cart that meters wrong plants a crop wrong, and you find out months too late. That is the failure the Flexi-Coil 1720, 2320 service manual PDF exists to prevent: 252 pages of factory service data covering both seed cart models under OEM ID GH-003.4. Wiring diagrams trace every monitor sensor circuit back to the console, and hydraulic schematics map the fan drive plumbing before you crack a single fitting. Metering takes up the largest share of the book, from roller and clutch service through drive ratio sprockets and chain. Set the shaft sensor gap at 1/8 inch, hold the wrap spring clutch latch arm to sprocket clearance at 1/32 inch, and confirm the meter drive box turns 109.5 rpm at rated input. Guess a clearance instead, and the monitor lies to you all season. Bookmarked and text-searchable, this download is ready before the seed truck backs in.
What's Inside This Flexi-Coil 20 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Adjustments & Maintenance | 5-64 | Safety in Service, Bolt Torques, Schematic Drawings, Major Operating Components, Connecting Drive Components, Dampers, Manifolds and Hoses, Undercarriage Components |
| Service Topics | 65-160 | Auger and Auger Support, Fan Assembly, Meter Drive Box, Meter Box Assembly, Meter Rollers, Clutch - Magnetic, Clutch - Wrap Spring, Drive Ratio Sprockets and Chain |
| Monitor System | 161-218 | Introduction, Block Diagram, Sensor Descriptions, Service and Troubleshooting |
| Assembly Instructions | 219-246 | Seed Cart Assembly, Assembly to the Seeding Tool, Double Shoot Option, Remote Switch, Warning Lamp Package |
| Post-Assembly / Pre-Delivery Checks | 247-252 | Post Assembly Checks, Pre-Delivery Checks |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Meter drive box assembly depth | 9 1/2 inches | p. 29 |
| Meter drive box input rpm | 109.5 rpm | p. 33 |
| Meter box displacement cavity | 25 3/16 inches | p. 30 |
| Shaft sensor gap | 1/8 inch | p. 30 |
| Wrap spring clutch latch arm to sprocket clearance | 1/32 inch | p. 35 |
| Meter roller torque value | < 15 lbf-ft | p. 96 |
| Wrap spring clutch torque value | < 25 lbf-ft | p. 96 |
| Auger Weight | 330 lbs. | p. 27 |
| Fan Speed Range | 0 to 5000 rpm | p. 30 |
| Magnetic Clutch Voltage | 12 volts | p. 38 |
| Magnetic Clutch Torque | 70 lbf-ft | p. 38 |
| 2320 Tank Weight (empty) | 1800 lbs. | p. 61 |
Flexi-Coil 20 Series Common Problems This Manual Covers
Flexi-Coil 2320 meter drive pulses, stops momentarily, then seeds at about half rate
Check for drive slippage with a torque wrench: the meter roller should hold to 15 lbf-ft and the drive box clutches to 50 lbf-ft, per the slip values on page 96. Verify the drive box input shaft turns 109.5 rpm, listed on page 33. Replace the one-way clutch bearings if the shaft ratchets in both directions.
Manual Section: Meter Drive Box Troubleshooting p. 96Seed rate hunts up and down, wavy uneven bands across the full drill width
Inspect each wrap spring clutch while it drives; clearance between the latch arm and sprocket must not exceed 1/32 inch, the setting shown on page 35. Test the solenoid for a 2 Amp draw at 6 volts. Replace any clutch that slips below 25 lbf-ft and recheck the rate before pulling back into the field.
Manual Section: Wrap-Spring Clutch Troubleshooting p. 35Tank will not hold air pressure, lid pops up or leaks under fan pressure
Pressurize the tank with the fan running; the fan is rated for 0 to 5000 rpm on page 30, so hold normal seeding speed. Spray soapy water around the lid, drain, clean-out door, and meter box bottom seal, and watch for bubbles. Replace the lid gasket, straighten a bent lid rim, and reseal the inspection panel.
Manual Section: Meter Box Air Leaks p. 30Monitor shows ER 73 rear sensor fault, tank gauge stays blank after sensor replacement
Check ER 73 against the error code reference, then work through the bin level sensor tests in the monitor troubleshooting section on page 196, where the 5 volt tube-type sensors must read +5 volts plus or minus 0.25 and the 12 volt cone-shaped sensors must read battery voltage. Set the fan shaft sensor gap to 1/8 inch with the jam nuts, per page 30. Trace the harness against the wiring diagram before buying another sensor; a chafed wire fails the exact same way.
Manual Section: Monitor System Troubleshooting p. 196Hydraulic fan will not hold speed at seeding rpm, fan speed alarm keeps tripping
Measure back pressure at the fan motor return line; the Gresen motor tolerates no more than 1000 psi, the limit given on page 80. Replace any kinked or collapsed return hose and route the return straight to sump, not through the remote. Verify the tractor remote supplies steady flow, then confirm the fan holds target speed through a full pass.
Manual Section: Fan Drive Motor Troubleshooting p. 80Meter rollers turn hard, bind, or will not rotate freely after fertilizer use
Remove the meter rollers and turn each shaft by hand; a good roller breaks free under 15 lbf-ft, the slip value listed on page 96. Clean fertilizer buildup from the roller flutes with warm water, dry them completely, and replace any bearing that feels gritty. Blow out the meter box at season end so everything spins free next spring.
Manual Section: Service Topics p. 96Frequently Asked Questions
What does Flexi-Coil 2320 error code Err 73 mean?
Error code Err 73 indicates that the rear bin level sensor is not communicating with the monitor system. In version 3.x consoles, this error code appears in the alarm recall queue, and the monitor will flash all eight bin segments instead of displaying the error code. p. 200
What are the torque specifications for the 2320 seed cart rear wheel bolts?
The torque specification for the 2320 seed cart rear wheel bolts is 325 lbf-ft (542 N-m). p. 57
What is the correct procedure for adjusting the fan shaft sensor gap?
To adjust the fan shaft sensor, adjust the nuts (1) on the shaft sensor (2) to obtain a gap of 1/8 inch between the sensor and the round head bolt mounted on the fan shaft. p. 30
What is the required torque for the master clutch mounting bolts on the Gresen motor?
The mounting bolts for the Gresen motor should be torqued to 5 lbf-ft. Do not over-tighten these bolts. p. 89
How often should the wheel bearings on the seed cart be repacked?
The seed cart dual caster or rear wheel bearings should be repacked every one hundred hours of operation. p. 148
What exactly do I receive with this Flexi-Coil 1720 Service Manual?
Instant PDF download. You get the full 252-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print specific sections of this Flexi-Coil 1720 Service Manual?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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