Putting your New Holland TN75, TN70, TN65, or TN55 back to factory spec requires exact data. This 870-page service manual delivers hydraulic schematics with full fluid routing, wiring diagrams for every circuit, and fault code diagnostics. The transmission section alone provides component-level service procedures spanning the front axle, rear mechanical, PTO, brakes, and steering. You will find precise specifications, such as torquing the cylinder head bolts to 70 Nm (52 ft-lbs) followed by two 90° rotations, and main bearing caps to 80 Nm (59 ft-lbs) plus a final 90° turn. Stop relying on forum guesses for angle-torque sequences. The file is fully bookmarked by section and keyword-searchable, allowing you to pull it up on a tablet right next to the tractor.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 7-106 | Cylinder Head, Timing Gears, Oil Pump, Crankshaft, Connecting Rod, Piston, Tappet, Rocker Arm |
| Clutch | 107-126 | PTO Clutch, Main Clutch, Belleville Spring Disk, Pressure Plate, Flywheel, Clutch Cover, Power Shuttle Gear Control Disk |
| Transmissions | 127-438 | Mechanical Transmission, Synchro-Command, Non-Synchronized Transmissions, Shuttle Unit, Gearbox, Range Gear, Shuttle |
| Drive Lines | 439-452 | Transmission Shafts, Drive Gear Housing Assembly, Drive Gear |
| Front Axle Mechanical Transmission | 453-496 | Front Axle, Bevel Drive, Differential, Epicyclic Final Drive, Steering Knuckle, Wheel Hubs, Axle Pivot |
| Rear Mechanical Transmission | 497-526 | Bevel Gear Pair, Differential, Lateral Final Drives, Rear Transmission Gearbox, Differential Lock Engagement Sleeve |
| Mechanical Power Take-Off | 527-538 | PTO 540 RPM, PTO Cover, Drive Shaft Bearings, PTO Shaft Bearings, Seal Ring, Grooved Terminal, Rear Transmission Housing, Driven Gear Support Bushing |
| Braking System | 539-556 | Service Brake, Parking Brake, Brake Hydraulic Pump, Handbrake Control |
| Hydraulic System | 557-624 | Rear Mechanical Hydraulic Lift, Implement Hitching Device, Lift Internal Controls, Hydraulic Lift Tools, Hydraulic Lift Circuit, Hydraulic Lift Control Valve Block, Draft Control Device |
| Steering | 625-662 | Hydrostatic Steering, Control Valve, Steering Wheel, Rotor, Cylinder Safety Valve, Backflow Valve, Pressure Relief Valve |
| Axles and Wheels | 663-680 | Front Axle Hub, Front Axle, Stub Axle, Leading Wheels |
| Electrical System | 681-854 | Analog Instruments, Controls, Transmitters, Sensors and Switches, Starter Motor, Alternator |
| Platform, Cab, Bodywork | 855-870 | Hood Opening, Protective Grill, Hood Guard, Dashboard, ROPS (Roll Over Protection Structure), Right or Left-Hand Mudguard, Rear Guard |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head bolts torque | 70 Nm (52 ft-lbs) + 90° + 90° | p. 28 |
| Main bearing cap bolts torque | 80 Nm (59 ft-lbs) + 90° | p. 28 |
| Fuel filtering type | replaceable cartridge | p. 10 |
| Air cleaning type | dual cartridge dry air filter | p. 10 |
| Engine oil filter replacement interval | every 400 operating hours | p. 71 |
| Engine oil filter tightening | by hand only, through a further 3/4 turn | p. 71 |
| Power Shuttle hydraulic filter type | paper cartridge | p. 163 |
| Hydraulic lift circuit filter type | full-flow filter, with paper cartridge | p. 598 |
| Thermostat normal working temperature range | 65°C to 105°C (149°F to 221°F) | p. 9 |
| Fan belt deflection (without air conditioning) | 10 to 11 mm (0.3937 to 0.4331 in.) for 78 to 98 N load | p. 705 |
| Fan belt deflection (with air conditioning) | 12 to 13 mm (0.4724 to 0.5118 in.) for 78 to 98 N load | p. 705 |
| Coolant pump retaining bolts torque | 55 Nm (41 ft-lbs) | p. 28 |
