Part of the New Holland Repair Manuals.
This is the CNH Belgium repair manual for the New Holland CX720, CX740, CX760, CX780, CX820, CX840, CX860 and CX880 straw walker combines, dated 2006.
It covers the New Holland 7.5 litre and Iveco engines, primary and secondary hydraulics, the hydrostatic drive and electrical schematics by series. It also follows the whole crop path, from header lift to the unloading auger.
The book is laid out by system, with engine, hydraulic, hydrostatic and crop processing specifications, a fault code index and troubleshooting tables.
What's Inside This New Holland CX720–CX880 Series Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Serial Numbers | 1-20 | Model List, Basic Instructions, Electronics Protection During Welding, Inch and Metric Torque Tables, Conversion Factors, Serial Number and Model Codes |
| Primary Hydraulic System | 21-102 | Pump Specifications, Circuit Description and Symbols, High Pressure Hydraulic Schematics, Valve and Pump Repair, Troubleshooting |
| Secondary Hydraulic System and Stack Valve | 103-152 | Low Pressure Pump Specifications and Schematic, Pump and Valve Block Removal and Inspection, Stack Valve Disassembly and Assembly |
| Pneumatic System | 153-180 | Compressor Specifications, Air Reservoir, Regulator, Troubleshooting |
| Electrical Basics and Component Locations | 181-292 | Fuses, Relays and Sensors, Component Code Lists per Series, Component Locations on the Combine, Component Identification |
| Electrical Schematics | 293-720 | Electrical Schematic Frames 01 to 48 by Series, Component Lists |
| Harness and Connector Diagrams | 721-1290 | Component Diagrams 02 to 48, Wiring Harness Overview |
| Electrical Testing and Repair | 1291-1316 | Multimeter Preliminary Tests, Alternator Drive Overhaul, Harness Repair, Fuse Box, Alternator and Battery Troubleshooting |
| Lighting System | 1317-1394 | Logic Diagram, Interior Light Replacement, Relay, Switch and Light Tests, Fault Codes |
| Electronic System and Fault Code Index | 1395-1546 | Fault Code Index, InfoView Monitor, CCM1 to CCM3 Modules, Data Bus, Sensor Adjustment, Module Fault Codes |
| Engine | 1547-1830 | Torque Tables, Special Tools, General Specifications, Removal and Installation, Cylinder Head, Cylinder Block, Crankshaft, Connecting Rods and Pistons, Timing, Troubleshooting |
| Fuel and Injection System | 1831-2134 | Injection Pump, Injectors, Lift Pump, BOSCH EDC Electronic Injection Control, Bleeding, Fault Codes |
| Air Intake and Exhaust | 2135-2190 | Turbocharger Torques, Boost Pressure and Air Temperature Sensor Diagnostics, Exhaust Manifold Torques |
| Engine Cooling System | 2191-2262 | Specifications, Thermostat Removal and Test, Water Pump and Drive, Rotary Screen Brush, Fault Codes |
| Lubrication and Starting | 2263-2330 | Oil Specifications, Oil Pump, Sump, Oil Cooler, Pressure Valve, Cold Start, Starter, Relay and Switch Tests |
| Gearbox, Hydrostatic Drive and Clutches | 2331-2654 | Fixed Coupling, Mechanical Gearbox, Hydrostatic Transmission Specifications, Schematics and Troubleshooting, Threshing and Unloading Clutches, Engine Gearbox |
| Axles, Steering and Brakes | 2655-2890 | Front Axle and Final Drives, Rear Axle, Hydrostatic 2WD-4WD Drive, Hydraulic Steering, Service Brake, Parking Brake |
| Shields, Platform, Cab and Air Conditioning | 2891-3166 | Shields, Platform and Steps, Controls and Seat, Wipers and Washer, Heater, Air Conditioning, Safety |
| Header Lifting and Levelling | 3167-3268 | Header Lift, Levelling, Fault Codes |
| Reel, Header Drives and Feeder | 3269-3438 | Reel, Header Drives, Feeder Housing Clutches, Reverser, Lower Shaft and Roller, Fault Codes |
| Threshing Drum, Concaves and Separation | 3439-3634 | Threshing Drum and Variator, Concave Specifications, Beater, Rotary Separator, Straw Walkers, Straw Flow Beater |
| Grain Storage and Elevator | 3635-3712 | Grain Augers and Gearboxes, Grain Elevator Chain and Top Shaft |
| Cleaning System and Returns | 3713-4066 | Sieves, Cleaning Fan and Variator Specifications, Returns System |
| Straw Chopper, Spreader and Unloading | 4067-4282 | Straw Chopper Specifications and Troubleshooting, Spreader, Chaff Blower, Unloading Gearbox, Auger and Tube |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine displacement | 7500 cc (458 cu. in.) CX720-CX840; 7790 cm3 (475 in3) CX860; 10300 cm3 (629 in3) CX880 | p. 1565 |
| Engine gross power | 160 kW CX720; 175 kW CX740; 190 kW CX760; 200 kW CX780 and CX820; 220 kW CX840; 245 kW (333 HP) CX860; 315 kW (428 HP) CX880 | p. 1565 |
| Engine rated and low idle speed | 2100 rpm rated; 1300 rpm low idle (CX720-CX840) | p. 1565 |
| Compression ratio | 17.0:1 (CX720 to CX840), 16 ± 0.8 (CX860), 17 ± 0.8 (CX880) | p. 1565 |
| Valve lash, cold | 0.36-0.46 mm (0.014-0.018 in) intake, 0.43-0.53 mm (0.017-0.021 in) exhaust (CX720-CX840); 0.40 mm +/- 0.05 (0.016 in +/- 0.002) (CX860, CX880) | p. 1566 |
| Engine oil pressure | 2.41 bar (35 lbf/in2) minimum at rated speed, 0.83 bar (12 lbf/in2) minimum at low idle (CX720-CX840); 5 bar (72.5 psi) warm, 2.5 bar (36.3 psi) minimum permissible (CX860, CX880) | p. 2266 |
| Cylinder head bolt tightening | 50 (37 ft. lbs.) → 100 (73 ft. lbs.) → 90 ° → 75 ° (CX860); 60 (44 ft. lbs.) → 120 (88 ft. lbs.) → 120 ° → 60 ° (CX880) | p. 1555 |
| Connecting rod and main bearing bolts | 149 Nm (110 lbf ft) connecting rod; 81 Nm + 90 ° (60 lbf ft + 90 °) main bearing (CX720-CX840) | p. 1553 |
| Fuel injection pressure | 1500 bar (21,750 psi); injector setting 280 bar +/- 12 (CX860), 296 bar +/- 6 (CX880) | p. 1571 |
| Engine oil with filter | 23 litres (24.3 US Qts.) CX720-CX840; 24 liters (6.34 gal.) CX860; 29 liters (7.7 gal.) CX880 | p. 1565 |
| Engine cooling system | 31.5 liters (8.3 gal.) CX720-CX840; 42 liters (11.1 gal.) CX860, CX880 | p. 1612 |
| Thermostat | 79-83 °C (174-181 °F) opening, 93-96 °C (199-205 °F) fully open (CX720-CX840) | p. 2195 |
| Main hydraulic pump | 114 Ltr/min (30 US gal/min) minimum output at rated speed; 21 bar (305 psi) standby; 207 bar (3000 psi) maximum system pressure | p. 25 |
| Steering | 186 bar (2700 psi); 36 Ltr/min (9.5 US gal/min) to the steering motor | p. 25 |
| Secondary hydraulic system | 43 Ltr/min (11.36 US gal/min) minimum output; 25 bar (363 psi) regulated pressure | p. 106 |
| Hydrostatic drive pressures | 420 bar (6090 psi) pressure limiter; 450 bar (6525 psi) relief valve | p. 2458 |
| Hydraulic and hydrostatic oil capacity | 70 Litres (74 qts.) approximately, total system; 36 Litres (38 qts.) reservoir | p. 2458 |
| Gearbox maximum input torque | 634 N·m (468 ft. lbs.) CX720, CX740, CX760; 632 N·m (466 ft. lbs.) CX780, CX820, CX840; 823 N·m (607 ft. lbs.) CX860, CX880 | p. 2343 |
| Cleaning fan speed | 500 - 940 rpm (CX720-CX820); 475 - 900 rpm (CX840, CX860, CX880) | p. 3721 |
| Straw chopper | 3251 rpm (HI); 1664 rpm (LO); rotor diameter 600 mm (23.6 in.) | p. 4070 |
