Part of the Case Repair Manuals.
The crew is standing around a machine that will not crank, or the boom sagged overnight, and every hour on the meter is money going the wrong way. This is the Case factory service manual for the 1085C Cruz-Air wheeled excavator, issued May 1990, covering the 6-590, 6T-590, and 6TA-590 diesel engines.
Everything on this machine is mechanical. No ECU, no fault codes, nothing to plug a laptop into. Faults trace with a pressure gauge, a multimeter, and the five fold-out wiring schematic plates. The Hydraulics section carries its own fold-out schematics.
The specs are printed, not guessed. A guessed rod bolt torque costs an engine, and a guessed relief pressure cooks a pump. Follow the book and order the right part the first time.
What's Inside This Case 1085C Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 4-29 | Standard Torque Specifications, Fluids and Lubricants, Detailed Engine Specifications |
| Engines | 30-282 | Engine and Radiator Removal and Installation, Stall Tests, Cylinder Head and Valve Train, Lubrication System, Turbocharger Failure Analysis |
| Fuel System | 283-368 | Accelerator Master Cylinder, Fuel System and Filters, Pump Drive Gear and Timing, Fuel Injectors |
| Electrical System | 369-486 | Starter and Alternator, Batteries, Electric Swivel, Gauges |
| Steering | 487-581 | Steering Control Valve, Steering Selector Valve, Front Axle, Steering Cylinder |
| Power Train | 582-799 | Transmission, Drive Shafts and Universal Joints, Differential and Planetary, Wheels and Tires |
| Brakes | 800-884 | Brake Specifications and Adjustments, Parking Brake, Accumulator, Swing Brake |
| Hydraulics | 885-1175 | Hydraulic Schematics, Main Control Valves, Remote Control Valves, Swing Motor, Hydraulic Swivel |
| Mounted Equipment | 1176-1247 | Pedals and Levers, Swing Gearbox, Boom and Arm, Turntable Bearing |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine Oil Capacity with Filter Change | 17 U.S. quarts (16.1 litres) | p. 14 |
| Engine Cooling System Capacity | 8.5 U.S. gallons (32 litres) | p. 14 |
| Fuel Tank Capacity | 75 U.S. gallons (284 litres) | p. 14 |
| Hydraulic Reservoir Refill Capacity | 36 U.S. gallons (136 litres) | p. 14 |
| Transmission Capacity with Filter Change | 22.5 U.S. quarts (21.3 litres) | p. 14 |
| Connecting Rod Bolts torque | 74 lb ft (100 Nm) | p. 26 |
| Flywheel Retaining Bolts torque | 101 lb ft (137 Nm) | p. 26 |
| Flywheel Housing Bolts torque | 45 lb ft (60 Nm) | p. 26 |
| Exhaust Manifold Bolts torque | 32 lb ft (43 Nm) | p. 26 |
