Part of the New Holland Repair Manuals.
This 310-page New Holland DC70, DC80, and DC100 Crawler Dozer Service Manual (OEM #75131001) covers the LGP variants too, breaking down the hydrostatic transmission, final drives, and undercarriage from the ground up. Open it and you get the electrical system diagram with full wiring layouts, hydraulic schematics for the lifting, angle, and tilt cylinder circuits, and a troubleshooting section that walks you through the travelling hydraulic pump and solenoid valves step by step. Set your boost pressure to 20 bar (290 PSI) at idle and 33 bar (478 PSI) at max engine speed, and keep gearbox oil under 90-95°C during intermittent runs. No more chasing a hydrostatic drive that keeps overheating with guesswork and a heat gun. Bookmarked by section so you can jump straight from Undercarriage to Electrical without hunting, this PDF opens on your laptop or phone right at the machine.
What's Inside This New Holland DC70, DC80, DC100 Manual
| System | Pages | Key Topics |
|---|---|---|
| Generalities | 7-52 | Safety Rules, Technical Data Tables, General Instructions, Diagnostic Checks, Units of Measure |
| Engine | 53 | Manufacturer's Manual Reference |
| Hydrostatic Transmission | 55-144 | General Description, Installation, Troubleshooting, Hydraulic Motor, Travelling Hydraulic Pump, Solenoid Valves |
| Final Drives and Sprocket | 145-198 | Description, Disassembly, Sprocket Inspection, Gearbox Disassembly, Brake Check, Gearbox Lubrication, Hydraulic Motor |
| Undercarriage | 199-246 | General Description, Troubleshooting, Track Chains, Track Release and Adjuster Mechanism, Track Idler Wheels, Track Bottom Rollers, Track Carrier Rollers |
| Hydraulic System for Bulldozer Equipment | 247-288 | Description and Operating, Lifting Cylinder System, Angle Cylinder System, Tilt Cylinder System, Distributor, Pump, Solenoid Valves, C-Frame |
| Electrical System | 289-309 | Safety Rules, Main Parts Location, Electrical System Diagram, Fuses, Microprocessor MC7, Control Panel, Rotation Angle Sensor |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Nominal boost pressure at engine idle speed | 20 bar / 290 PSI | p. 122 |
| Peak boost pressure at engine max. speed | 33 bar / 478 PSI | p. 122 |
| Max. oil temperature for pump coupler | 105° C / 221° F | p. 134 |
| Max. oil temperature for gearbox (intermittent) | 90-95°C / 194-203°F | p. 186 |
| Engine Oil Capacity | 10 L | p. 40 |
| Radiator Cap Pressure | 0.75 bar / 75 kPa | p. 24 |
| Max. Towing Speed | 2 km/h / 1.24 miles/h | p. 123 |
| DC70 | ||
| Gearbox Oil Capacity, DC70 | 3 L / 0.78 gallons | p. 186 |
| Track Chain Master Link Torque, DC70 | 150 Nm / 110 ft-lb | p. 205 |
| DC80/DC100 | ||
| Gearbox Oil Capacity, DC80/DC100 | 4.5 L / 1.18 gallons | p. 186 |
| DC80 | ||
| Track Chain Master Link Torque, DC80 | 250 Nm / 180 ft-lb | p. 206 |
| DC100 | ||
| Track Chain Master Link Torque, DC100 | 350 Nm / 252 ft-lb | p. 207 |
