Part of the Case Repair Manuals.
This 919-page Case Corporation 1085B, 1086B Service Manual (OEM #8-44630) puts the complete cruz-air excavator platform under one cover, from engine and fuel system through steering, power train, brakes, and hydraulics. Open it up and you get full wiring diagrams for the electrical system, hydraulic schematics covering the steering and outrigger pumps, swing motor, and control valves, plus a torque specifications section that spans both U.S. and metric hardware. You get exploded views for the boom, turntable, and swing gearbox too, so parts identification stops being a guessing game. Torque the wheel lug nuts to 420-430 lb-ft (570-583 N-m), and set the tool cylinder capscrews at 1200-1300 lb-ft on lubricated threads. Stop tearing into the machine on hunches pulled from an old forum thread. It's bookmarked by section, so you can jump straight to Steering or Hydraulics from your phone and start turning wrenches.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-34 | Safety Rules, Service Manual Introduction |
| Engine | 35-268 | Engine and Radiator Removal and Installation, Engine Accessories, Cylinder Head and Valve Train, Cylinder Block, Pistons, Rods, Camshaft Main Bearings, Oil Seals |
| Fuel System | 269-346 | Fuel Lines, Fuel Tank, And Engine Controls, Fuel System and Filters, Bosch Fuel Injection Pump, Drive Gear, And Timing, Fuel Injectors |
| Electrical | 347-433 | Removal and Installation of Starter and Alternator, Electrical System Specifications and Troubleshooting, Wiring Diagrams, Batteries, Starter, Alternator, Collector Ring |
| Steering | 434-477 | Steering System Troubleshooting, Steering Control Valves, Steering Relief Valve and Steering Reversal Valve, Steering Axle and Tie Rod |
| Power Train | 478-609 | Torque Converter, Transmission, Transmission Controls, Drive Shafts, Axle Differential, Axle Planetaries |
| Brakes | 610-719 | Air Compressor and Governor, Air Reservoir and Relief Valve, Brake Valve, Relay Valve, And Pressure Reducing Valve, Brake Actuator, Digging Brake Control Valve |
| Hydraulics | 720-855 | Hydraulic Pump for Steering and Outside Control Valve, Hydraulic Pump for Outrigger and Inside Control Valve, Inside and Outside Control Valves, Swing Motor, Hydraulic Swivel |
| Mounted Equipment | 856-916 | Controls and Linkages, Outriggers, Swing Geabox and Swing Brake, "E" Boom, "Y" Boom, Turntable, Bearing, And Related Parts |
| Schematic | 917-919 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Wheel Lug Nuts Torque | 420 to 430 pound-feet (570 to 583 N m, 58 to 59 kg/m) | p. 607 |
| Tool Cylinder Capscrew Torque | 1200-1300 lb-ft (1625-1760 Nm) (lubricated threads) | p. 572 |
| Piston OD at 12 mm From the Bottom, 90 Degrees From Piston Pin Standard Size | 101.873 to 101.887 mm | p. 26 |
| Service Cylinder Sleeve Machine Cylinder Block Bore to | 104.485 to 104.515 mm | p. 26 |
| Main Bearing Oil Clearance | 0.041 to 0.119 mm | p. 28 |
| Cylinder Head Bolts Torque | 93 lb ft (126 Nm) (12.6 kgm) | p. 32 |
| Injection Pump Mounting Bolts Torque | 18 lb ft (24 Nm) (2.4 kgm) | p. 289 |
| Fuel Tank Capacity | 50 gallons | p. 12 |
| Engine Oil Capacity - With filter change | 17 quarts | p. 13 |
| 6T-590 and 6TA-590 Engine | ||
| Piston Rings No. 1 Compression (6T-590 and 6TA-590 Engine) End Gap in 102.02 ID | 0.40 to 0.70 mm | p. 27 |
| 6T-590 | ||
| Fuel Injectors Opening Pressure (New), 6T-590 | 3550 to 3670 PSI (24 476 to 25 303 kPa) (245 to 253 Bar) | p. 327 |
| 6TA-590 | ||
| Fuel Injectors Opening Pressure (New), 6TA-590 | 3190 to 3310 PSI (21 994 to 22 821 kPa) (220 to 253 Bar) | p. 328 |
