Part of the Case IH Repair Manuals.
The hydrostatic drive is where a combine owner usually gets stuck, and this factory Case IH manual for the 2566, 2688 and 2799 covers it in full. It includes the hydrostatic drive schematic, pump, transmission, final drives, PTO and brakes. You also get the charge pump output and Foot-N-Inch valve pressure to test against.
Past the driveline, it covers the main valve block, feeder reverser, reel drive valve and motor, rotor gearbox, feeder housing, unloader, chopper and concave adjustment. Section 3000 lays out the electrical schematics circuit by circuit, from starting and charging to header height/tilt and CAN bus.
Every day the combine sits in the shed, the crop stands in the field waiting on you. Pin the fault to one component, order the right part the first time and get back to cutting.
What's Inside This Case IH 2566, 2688, 2799 Manual
| System | Pages | Key Topics |
|---|---|---|
| Standard Torque Specifications and Fluids (1000-1010) | 1-11 | Torque Charts for Decimal and Metric Fasteners and Steel Hydraulic Fittings, Fluids, Lubricants and Capacities |
| Engine Removal and Installation (2000) | 12-43 | Engine Removal and Installation, Engine Mounting |
| Electrical Schematic and Electrical System (3000-3030) | 44-229 | Electrical Schematic, Connector Pin Information, Electrical System Troubleshooting, Neutral Start Switch, Starting with Auxiliary Batteries, Alternator |
| Steering (4000-4020) | 230-263 | Steering Hand Pump, Steering Cylinders, Steering Priority Valve |
| Rear Axles (5000-5020) | 264-369 | Rear Steering Axle, Axle with Auxiliary Traction, Power Guide Axle |
| Hydrostatic System (6000-6050) | 370-525 | Hydrostatic System Operation and Specifications, Hydrostatic Drive Schematic, Hydrostatic Drive, Drive System Testing, Slow Approach Valve, Hydrostatic Pump, Hydrostatic Motor and Transmission |
| Transmission and Final Drives (6060-6080) | 526-617 | Transmission Service, Standard and Heavy Duty Final Drives Removal and Overhaul, Wheel Spacing and Final Drive Position |
| PTO (7000-7020) | 618-677 | PTO Operation, PTO Gearbox Removal and Installation, Servicing the PTO Housing |
| Brakes (8000-8010) | 678-711 | Brake Assemblies Removal and Overhaul, Master Brake Valve |
| Hydraulic System Operation (9000) | 712-843 | Basic Principles, Hydraulic Pumps and Drive System, Steering Circuit, Main Valve Assembly and Solenoid Functions, Reel, Unloader and Field Tracker Valves, Accumulator, Service Brake Valve, Separator Drive, Pressure Tests |
| Feeder Reverser and Hydraulic Troubleshooting (9010-9020) | 844-895 | Feeder Hydraulic Reversor Drive, Hydraulic System Specifications, Troubleshooting Procedures, Pressure and Flow Tests |
| Hydraulic Valves and Pumps (9030-9070) | 896-979 | Pressure Regulator Valve, Auxiliary Gear Pump and PFC Pump, Main Hydraulic Valve Block, Parking Brake and Feeder Drive Valve, Separator Drive and Unloader Auger Drive Valves |
| Separator Drive, Air Screen, Cylinders and Reel Drive (9080-9120) | 980-1059 | Separator Drive Tests, Rotating Air Screen, Hydraulic Cylinders, Reel Drive Valve and Motor |
| Air Conditioning and HVAC (10000-10010) | 1060-1163 | Air Conditioning Troubleshooting, Automatic Temperature Control, HVAC System Repair |
| Separator and Rotor Drives (10020-10060) | 1164-1317 | Separator Drive Jackshaft, Rotor Drive, Rotor Gearbox, Rotor and Feeder Housing Removal, Rotor Drive Belt |
| Feeder, Cleaning Fan and Elevator Drives (10070-10090) | 1318-1381 | Feeder and Cleaning Fan Gearbox, Cleaning Fan Drive, Elevator Drive Jackshaft |
| Residue Handling (10100-10120) | 1382-1429 | Discharge Beater, Straw Spreader Drive, Blade Box |
| Tailings Monitor, Unloader, Engine Covering and Straw Chopper (10130-10160) | 1430-1495 | Tailings Monitor, Unloader System, Engine Covering, Straw Chopper Gearbox |
| Concave Adjustment and Cleaning System (10170-10180) | 1496-1569 | Concave Adjustment, Cleaning System Overhaul |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Engine oil type | CASE No. 1 SAE 15W-140 API CI-4 Engine Oil | p. 10 |
| Engine oil capacity | 19 Liters (20.1 U.S. Quarts) without filter change; 21 Liters (22.2 U.S. Quarts) with filter change | p. 10 |
| Coolant capacity (50% water and ethylene glycol) | 37.1 Liters (39.2 U.S. Quarts) | p. 10 |
| Transmission oil capacity (Case IH Hy-Tran Ultra) | 16.3 Liters (17.2 U.S. Quarts) | p. 10 |
| Final drive oil capacity | 12.3 Liters (13 U.S. Quarts) | p. 10 |
| Hydrostatic charge pump output, grain | 12 GPM (45.5 L/min) | p. 372 |
| Foot-N-Inch valve pressure, corn and grain | 6450±50 psi (444 bar) | p. 372 |
| PFC piston pump output to the camshaft (2700 engine RPM, oil 100 °F / 38 °C or higher) | 16.5 GPM (62.4 L/min) minimum | p. 866 |
| Field Tracker relief valve pressure set point | 207 Bar (3000 psi) | p. 916 |
| Wheel bolt torque | 275 lb ft (374 Nm) with a light application of oil | p. 587 |
| Engine front mounting bolt torque | 137 - 163 N.m (101 - 120 lb ft) | p. 29 |
| Final drive mounting bolt torque, standard and heavy duty | 375 to 400 lb ft (508 to 542 Nm) | p. 587 |
| 2566 | ||
| Fuel tank capacity, 2566 | 492 Liters (130 U.S. Gallons) | p. 10 |
| Hydraulic reservoir capacity, 2566 | 35.3 Liters (37.3 U.S. Quarts) | p. 10 |
| PTO case oil capacity, 2566 | 10.4 Liters (11 U.S. Quarts) | p. 11 |
| A/C refrigerant capacity, 2566 | 2.94 Kg (6.5 Lbs) | p. 11 |
| 2688, 2799 | ||
| Fuel tank capacity, 2688 / 2799 | 645 Liters (170 U.S. Gallons) | p. 10 |
| PTO case oil capacity, 2688 / 2799 | 13.2 Liters (14 U.S. Quarts) | p. 11 |
| A/C refrigerant capacity, 2688 / 2799 | 2.21 Kg (4.88 Lbs) | p. 11 |
| Rotor front bearing housing to impeller blade clearance, 2688 / 2799 | 0.76 to 3.81 mm (0.03 to 0.15 inches) | p. 1260 |
