Part of the Case Repair Manuals.
Auger drive motor leaking down mid season, and your picker is parked. The Case CPX620 service manual PDF answers that job: 620 pages published under OEM number 6-16630 for this cotton picker. Hydraulic schematics trace the manifold valve and drum lift circuits from pump to cylinder, and wiring diagrams follow every solenoid run back to its connector. Troubleshooting charts and a long stretch of exploded views take the auger motor down to end cover, gerotor, spacer plate and thrust bearing, then build it back in order. Check the drum lift auto solenoid coils for 4.3 ohm at 10 volt; torque the steering cylinder hydraulic lines to 27 to 34 Nm (20 to 25 lb. ft.). Grade 5 hardware runs 108 to 132 pound-inches at 1/4 inch. Cotton does not wait while you hunt for a spec. Bookmarked and searchable, it prints clean enough to live on the bench and get dirty.
What's Inside This Case CPX620 Manual
| System | Pages | Key Topics |
|---|---|---|
| Auger Drive Motor Disassembly | 608 | |
| Auger Motor Assembly | 609-614 | Disassembly Procedures, Inspection Procedures, Assembly Procedures |
| Hydraulic Oil Filters | 615 | Manifold Valve Inline Filter |
| Hydraulic System Air Removal | 616-620 | Filter Maintenance, Manifold Valve Filter |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Grade 5 Bolts, 1/4 inch | 108 to 132 Pound-Inches | p. 9 |
| Grade 5 Bolts, 5/16 inch | 204 to 252 Pound-Inches | p. 9 |
| Drum lift auto solenoids (2) and (8) coil resistance | 10 volt, 4.3 ohm | p. 82 |
| Remaining solenoid coil resistance | 12 volt, 7.5 ohm | p. 82 |
| Steering Cylinder Hydraulic Lines | 27 to 34 Nm (20 to 25 lb. ft.) | p. 200 |
| Differential Rolling Torque | 40 to 80 lb inch (4.5 to 9 Nm) | p. 264 |
| Free running clearance of brake discs | 3.75 to 4.25 mm | p. 339 |
| Engine Oil Capacity (With Filter Change) | 22 U.S. Quarts (21 Litres) | p. 17 |
| Fuel Tank Capacity | 150 U.S. Gallons (567 Litres) | p. 17 |
| Hydraulic Reservoir Capacity | 10 U.S. Gallons (38 Litres) | p. 17 |
| Grade 8 Bolt Torque (1/2 inch) | 110 to 132 Pound-Feet | p. 9 |
| Steering Cylinder Bore | 82.55 mm (3.25 inch) | p. 200 |
