Part of the Case Repair Manuals.
A Cyclo drum that skips seed or a marker circuit that folds out of sequence can cost you a planting window. This Case 900 service manual PDF is the factory service book for the planter, 539 pages filed under OEM number 8-91771. Hydraulic schematics trace the level lift, blower, sequence valve, and counterbalance circuits, with a symbol reference section so you can read the diagrams cold. Electrical troubleshooting walks the marker wiring fault by fault, and the cylinder sections rebuild carrying wheels, assist wheels, row markers, and vertical fold wing lifts. Torque the opener disc mounting bolts to 150 to 160 lb ft (203 to 217 Nm), and replace any furrow firming point worn below 47/64 inch. An invented torque figure strips threads or drops a wing. Bookmarked and text searchable, the PDF puts the right spec on screen minutes after checkout.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-12 | General Information, Specifications, Special Torques |
| Electrical | 13-83 | Electrical Troubleshooting, Manual Marker Electrical Wiring |
| Hydraulic Troubleshooting, Testing and Schematics | 84-120 | Troubleshooting, Blower System, Level Lift System, Counterbalance Valve, Pressure Switch, Solenoid Valves |
| Hydraulic Schematic Symbols and Component References | 121-130 | Schematic Symbols, Alternating Check Valve, Marker Solenoid Valve, Rotary Flow Divider, Holding Valves |
| Sequence Valves, Marker Valves, and Basic Hydraulic Valves | 131-265 | Sequence Valve Assembly, Inner/Outer Marker Solenoid Valves, Hitch Stabilizer Valve, Blower Motor, Flow Control Valve |
| Hydraulic Cylinders | 266-331 | Cylinder Diagrams, Carrying Wheels, Assist Wheels, Row Markers, Endwise Transport Wheels, Vertical Fold Wing Frame Lift |
| Chassis | 332-539 | Planter Row Unit Service, Cyclo Planter Seed Drum and Seed Tube Service, Cyclo Planter Seed Hopper, Horizontal Fold Adjustments, Plate Planter Hopper Bottom Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| SAE Grade 2, 1/4 bolt torque | 5 to 6 lb ft | p. 5 |
| SAE Grade 5, 1/4 bolt torque | 9 to 11 lb ft | p. 5 |
| Furrow Firming Point Wear Limit | Replace if worn to less than 47/64 inch | p. 8 |
| 10 amp fuse | 10 amp | p. 93 |
| Opener Disc mounting Bolt | 150 to 160 lb ft (203 to 217 Nm) | p. 334 |
| Opener Disc to Disc Clearance | 1/8 Inch Maximum | p. 334 |
| Gauge Wheel Pivot Pin | 150 to 160 lb ft (203 to 217 Nm) | p. 334 |
| Seed shoe bottom width at front | 7/8 inch | p. 348 |
| Modular Solenoid Valve Resistance | 7 to 10 ohms | p. 8 |
| Waterman Solenoid Valve Resistance | 9.5 to 13.50 ohms | p. 8 |
| Seed Opener Disc Minimum OD | 13-1/2 inch | p. 8 |
| Relief Valve Pressure (Holding and Sequence Valves) | 2600 PSI | p. 8 |
