Part of the Case Repair Manuals.
Written for the Case 1420 Axial Flow Combine, this 357-page Case 1420 service manual PDF (OEM ID GSS-1500) follows all ten factory sections, from the engine and separator drives to the operator's cab. Hydraulics fill over a third of the book, covering hydrostatic power steering, the electro-hydraulic control valves and automatic header control, with schematics showing how oil routes to each circuit. Wiring diagrams for the cab and electrical system sit next to troubleshooting charts that take you from symptom to cause. Set separator drive belt to pulley shield clearance at 1.778 mm (0.070 inch), and torque the pulley retaining nut to 251 to 339 N·m (185 to 250 ft. lbs.). A made-up torque figure can cost you the harvest. Bookmarked and text-searchable, the PDF rides along on a phone or laptop in the cab, so the specs stay with your 1420 in the shed or halfway down a wheat field.
What's Inside This Case 1420 Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine and Fuel Tank | 22-27 | Engine |
| Separator Drive Units | 28-57 | Engine PTO Gear Box, Separator Drive Jackshaft |
| Hydrostatic Drive | 58-73 | Hydrostatic Drive Pump, Hydrostatic Drive Motor |
| Brakes, Transmission, Differential, Final Drives and Steering Axle | 74-117 | Transmission, Final Drive and Pinion Assembly, Brakes |
| Hydraulic System | 118-247 | Hydrostatic Power Steering, Electro-Hydraulic Control Valves, Automatic Header Control |
| Cutting and Feeding | 248-255 | Feeder Gear Housing Assembly |
| Threshing and Separating | 256-293 | Rotor Drive Gear Case and Torque Sensing Unit, Auger Bed Assembly, Straw Chopper |
| Cleaning System | 294-299 | Cleaning Fan |
| Elevators and Grain Tank | 300-307 | Grain Tank Unloader Vertical Auger |
| Operator's Cab and Electrical System | 308-357 | Air Conditioning System, Wiring Diagrams |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Separator drive belt and pulley shield clearance | 1.778 mm (0.070 inch) | p. 47 |
| Pulley retaining nut | 251 to 339 N·m (185 to 250 ft. lbs.) | p. 249 |
| Hydraulic separator clutch idler assembly spring nut adjustment | 12.7 mm (1/2 inch) | p. 49 |
| Motor Cylinder Barrel Spring Test Load | 46.02-56.25 N/mm (262.8-321.2 Lbs.) | p. 59 |
| Motor Cylinder Barrel Spring Test Length | 40.56 mm (1.597 inches) | p. 59 |
| Rubber sleeve nut torque | 67.8 to 81.3 N·m | p. 68 |
| Unloader control cable pull | 178 N (40 lbs.) | p. 303 |
| Unloader upper gear case backlash | 0.10 mm to 0.15 mm (.004 to .006 inch) | p. 304 |
| Hydrostatic Drive Normal Operating Pressure | 37.23 to 38.61 MPa | p. 60 |
| Differential Pinion Shaft End Play | 0.05 to 0.2 mm | p. 76 |
| Air Conditioning Refrigerant Charge (R-12) | 2.4 kg | p. 314 |
| Feeder Gear Housing Gear Backlash | 0.13 to 0.28 mm | p. 249 |
