Part of the New Holland Repair Manuals.
This is the factory service manual for the New Holland T4 narrow and vineyard tractors: the T4.80V, T4.90V, T4.100V and T4.110V vineyard models and the T4.80N, T4.90N, T4.100N and T4.110N narrow models. It follows the CNH product structure, so you work from the system rather than from a chapter number: engine, clutch, transmission, four-wheel drive, axles, PTO, brakes, hydraulics, hitches, steering, wheels, cab climate and electrical. More than half the book is electrical, and most of that is harness drawings, connector diagrams and the fault-code tables with the guided test procedure behind each code.
What's Inside This New Holland T4.80-T4.110 V and N Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Front Matter and Standard Torques | 1-42 | How to Use the Manual, Shop Safety, Standard Tightening Torque Tables, Approved Fluids and Consumables |
| Engine | 43-312 | Engine and Crankcase, Pump Drives, Fuel Tank and Filters, Air Cleaner and Lines, Intake and Exhaust Manifolds, EGR Exhaust Treatment, Cooling System, Fan Drive, Aftercooler |
| Clutch | 313-372 | Clutch Assembly and Release Mechanism, Pedal Free Play, Clutch Removal and Refitting |
| Transmission | 373-542 | Gearbox, Shuttle and Range Units, Synchronisers and Shift Forks, Control Valves and Clutch Packs, Transmission Overhaul |
| Four-Wheel Drive (4WD) System | 543-586 | 4WD Engagement Clutch and Control, Drive Shaft and Supports, 4WD Testing and Overhaul |
| Front Axle System | 587-708 | Driven Front Axle, Bevel Drive and Differential, Epicyclic Hub Reduction, Steering Knuckles and Pivots, Axle Rebuild |
| Rear Axle System | 709-756 | Rear Bevel Gear Pair and Differential, Electro-Hydraulic Differential Lock, Final Drives, Bearing Preload and Backlash |
| Power Take-Off (PTO) | 757-814 | Rear PTO Clutch and Brake, Hydraulic PTO Clutch Control, Speed Selection and Output Shaft Change, PTO Overhaul |
| Brakes and Controls | 815-924 | Wet Disc Service Brakes, Parking Brake, Pedal Adjustment, Bleeding the Brake Circuit |
| Hydraulic Systems | 925-1112 | Fixed Displacement Pumps, Hydraulic Schematics for Each Transmission and Lift Build, Rear Lift with Mechanical Draft Control, Open-Centre Rear Control Valves, Relief Valve Settings and Pressure Testing |
| Hitches, Drawbars and Implement Couplings | 1113-1208 | Rear Three-Point Hitch and Lift Links, Front Hitch, Drawbars and Pick-Up Hitch, Implement Coupling and Setting |
| Frames and Ballasting | 1209-1216 | Chassis and Frame, Front and Wheel Ballast, Weight Fitting |
| Steering | 1217-1284 | Hydrostatic Steering Unit and Circuit, Steering Control Valve and Cylinder, Steering Column, Fault Finding |
| Wheels | 1285-1300 | Wheel and Tyre Fitment, Narrow and Vineyard Track Settings, Wheel Nut Torques |
| Cab Climate Control | 1301-1458 | Heating, Ventilation and Air Conditioning, Compressor and Condenser, Refrigerant Handling, Circuit Charging and Leak Testing |
| Electrical Systems: Control Systems and Harness Diagrams | 1459-2119 | Rear PTO and Transmission Control Systems, Complete Wire Harness Drawings, Connector Component Diagrams and Pin-Out Tables |
| Electrical Systems: Starting, Modules, Lighting and Cab Controls | 2120-2654 | Cab Engine Controls, Engine Starting System, Fuel Tank System, Electronic Control Modules, External Lighting Switches and Relays |
| Electrical Systems: Fault Codes and Diagnostics | 2655-3368 | Fault-Code Index and Tables, Sensor Range and Supply-Voltage Faults, Level 2 Monitoring, Guided Diagnostic Test Procedures |
| Accessories | 3369-3378 | Fitted Accessories and Their Service Points |
| Platform, Cab, Bodywork and Decals | 3379-3581 | Cab and Platform Assembly, Bodywork Panels, Hood and Grille, Glazing, Decals, Component Removal |
| Special Tool Index | 3582-3591 | Part Numbers of the Special Service Tools Each Procedure Calls for |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic system | ||
| Main pump displacement | 25.00 cm3/rev (1.53 in3/rev) and 14.00 cm3/rev (0.85 in3/rev), fixed displacement gear pumps | |
| Lift circuit | ||
| Pressure relief valve | 210.0 to 215.0 bar (3045 to 3117.5 psi) | |
| Calibrated valve | 10.0 bar (145.0 psi) | |
| Main circuit, varies by build | ||
| Main pressure relief valve | 190.0 bar (2755 psi); 180.0 to 185.0 bar (2610 to 2682.5 psi) on other builds | |
| Steering wheel circuit | ||
| Pressure relief valve | 170.0 bar (2465 psi) | |
| Services circuit | ||
| Pressure relief valve | 16.0 to 17.0 bar (232.0 to 246.5 psi) | |
| Engine | ||
| Emissions hardware | EGR exhaust treatment with aftercooler | |
| Rear axle | ||
| Differential lock | Electro-hydraulic | |
New Holland T4.80-T4.110 V and N Series Common Problems This Manual Covers
A stored fault code, a sensor fault, or a tractor that derates without an obvious cause.
Read the code and go to the fault-code section rather than swapping the sensor. Each code carries its conditions and a guided diagnostic that tells you what to measure and where. Codes for signal-below-range, sensor supply voltage and level 2 monitoring all look similar on the dash but point at different circuits. Once the test names a circuit, move to the harness diagrams and the connector component tables and back-probe the pin they specify.
Manual Section: Electrical Systems: Fault Codes and DiagnosticsThe rear lift is slow or will not hold, or a remote valve leaks down.
Find your hydraulic schematic first, because the relief settings differ by build. On the mechanical draft control build the lift relief is 210 to 215 bar and the main relief 190 bar, while other builds run a 180 to 185 bar main relief. Test against the right figure, then work through the fixed displacement pump, the open-centre rear control valves and the lift itself. The section carries the schematics, the test points and the overhaul procedures.
Manual Section: Hydraulic SystemsThe differential lock will not engage, or four-wheel drive drops out.
Both are electro-hydraulic on this tractor, so treat them as electrical faults until proven otherwise. Check for a stored code, then trace the switch and solenoid circuit through the harness diagrams to the connector. If the circuit is sound, move to the rear axle section for the differential lock hydraulics or to the four-wheel drive section for the engagement clutch and its control, both of which carry the pressure test and overhaul procedures.
Manual Section: Four-Wheel Drive (4WD) SystemFrequently Asked Questions
Which tractors does this manual cover?
Eight models across two narrow-body lines: the T4.80V, T4.90V, T4.100V and T4.110V vineyard tractors and the T4.80N, T4.90N, T4.100N and T4.110N narrow tractors. They share the driveline, hydraulics, electrical architecture and cab, so almost every procedure applies across all eight. Where a build differs, such as the hydraulic relief settings or the transmission fitted, the manual gives the separate schematic and figure.
Does it cover the fault codes and the wiring?
Yes, and that is the bulk of it. The harness and connector diagrams run from page 1459 to page 2119 with the pin-out tables, the starting, module, lighting and cab-control circuits from page 2120 to page 2654, and the fault-code index and tables from page 2655 to page 3368, including sensor range faults, supply-voltage faults and level 2 monitoring, each with its guided diagnostic procedure.
What hydraulic pressures should I be seeing?
The values depend on which hydraulic build the tractor carries, and the manual gives a separate schematic for each. On the mechanical-transmission build with a mechanical draft control lift, the lift relief valve is calibrated to 210 to 215 bar, the main relief valve to 190 bar, the steering circuit relief to 170 bar and the low-pressure services circuit to 16 to 17 bar. Other builds run a main relief of 180 to 185 bar. Identify your schematic before you set a valve.
Does the engine section cover the emissions system?
It does. Alongside the engine and crankcase, the pump drives, the fuel tank and filters, the air cleaner and the intake and exhaust manifolds, there is a dedicated chapter on Exhaust Gas Recirculation exhaust treatment, plus the cooling system, the fan and drive and the aftercooler.
How big is the manual and can I search it?
It is 3591 pages in English, a searchable and printable PDF. Search the text, print the pages you need for the bench, and keep the rest on a laptop in the workshop.
How will I receive this New Holland T4.80V, T4.90V, T4.100V, T4.110V, T4.80N?
This is a 3591-page searchable PDF (194 MB) ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Is this New Holland T4.80V, T4.90V, T4.100V, T4.110V, T4.80N, T4.90N, T4.100N?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
