Part of the New Holland Repair Manuals.
This is the factory service manual for the New Holland T4 orchard and low-profile tractors: the T4.80F, T4.90F, T4.100F and T4.110F orchard models and the T4.80LP, T4.90LP, T4.100LP and T4.110LP low-profile models, part number 51523358. It follows the CNH product structure, so you work from the system rather than a chapter number, and it identifies each model by serial number and by whether it has a cab. 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 behind each code.
What's Inside This New Holland T4.80-T4.110 F and LP Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Standard Torques | 11-36 | How to Use the Manual, Shop Safety, Standard Tightening Torques, Approved Fluids, Model and Serial-Number Identification for Cab and Cabless Builds |
| Engine | 37-306 | 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 | 307-366 | Clutch Assembly and Release Mechanism, Pedal Free Play, Clutch Removal and Refitting |
| Transmission | 367-536 | Gearbox, Shuttle and Range Units, Synchronisers and Shift Forks, Control Valves and Clutch Packs, Transmission Overhaul |
| Four-Wheel Drive (4WD) System | 537-574 | 4WD Engagement Clutch and Control, Drive Shaft and Supports, 4WD Testing and Overhaul |
| Front Axle System | 575-688 | Driven Front Axle, Bevel Drive and Differential, Hub Reduction, Steering Knuckles and Pivots, Axle Rebuild |
| Rear Axle System | 689-736 | Rear Bevel Gear Pair and Differential, Electro-Hydraulic Differential Lock, Final Drives, Bearing Preload and Backlash |
| Power Take-Off (PTO) | 737-794 | Rear PTO Clutch and Brake, Hydraulic PTO Clutch Control, Speed Selection and Output Shaft Change, PTO Overhaul |
| Brakes and Controls | 795-904 | Wet Disc Service Brakes, Parking Brake, Pedal Adjustment, Bleeding the Brake Circuit |
| Hydraulic Systems | 905-1096 | 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 | 1097-1192 | Rear Three-Point Hitch and Lift Links, Front Hitch, Drawbars and Pick-Up Hitch, Implement Coupling and Setting |
| Frames and Ballasting | 1193-1200 | Chassis and Frame, Front and Wheel Ballast, Weight Fitting |
| Steering | 1201-1268 | Hydrostatic Steering Unit and Circuit, Steering Control Valve and Cylinder, Steering Column, Fault Finding |
| Wheels | 1269-1284 | Wheel and Tyre Fitment, Orchard and Low-Profile Track Settings, Wheel Nut Torques |
| Cab Climate Control | 1285-1442 | Heating, Ventilation and Air Conditioning, Compressor and Condenser, Refrigerant Handling, Circuit Charging and Leak Testing |
| Electrical Systems: Harnesses and Connectors | 1443-2099 | Complete Wire Harness Drawings, Connector Component Diagrams, Fuse and Relay Layouts, Pin-Out Tables, Component Location |
| Electrical Systems: Engine and Cab Control Circuits | 2100-2644 | Cab Engine Controls, Engine Control System, Starting and Charging Circuits, Electronic Control Modules, Lighting and Instruments |
| Electrical Systems: Fault Codes and Diagnostics | 2645-3352 | Fault-Code Index and Tables Including Solenoid Energizing-Time Comparison Faults, Guided Diagnostic Test Procedures |
| Accessories | 3353-3362 | Fitted Accessories and Their Service Points |
| Platform, Cab, Bodywork and Decals | 3363-3565 | Cab and Platform Assembly, Bodywork Panels, Hood and Grille, Glazing, Decals, Component Removal |
| Special Tool Index | 3566-3575 | 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 | |
| Lift circuit | ||
| Pressure relief valve | 210.0 to 215.0 bar (3045.0 to 3117.5 psi) | |
| Calibrated valve | 10.0 bar (145.0 psi) | |
| Main circuit, varies by build | ||
| Main pressure relief valve | 190.0 bar (2755.0 psi) on some builds, 180.0 to 185.0 bar (2610.0 to 2682.5 psi) on others | |
| Steering wheel circuit | ||
| Pressure relief valve | 170.0 bar (2465.0 psi) | |
| Engine | ||
| Emissions hardware | EGR exhaust treatment with aftercooler | |
| Rear axle | ||
| Differential lock | Electro-hydraulic | |
| All models | ||
| Build identification | Serial number and cab or cabless build, both listed in the front matter | |
New Holland T4.80-T4.110 F and LP 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 parts. Each code carries the conditions that set it and a guided diagnostic naming what to measure and where. Codes about comparing solenoid energizing times point at a valve or its driver rather than the function you can see. Once the test names a circuit, use the harness drawing and connector diagram for your build 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 pumps, 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 here, so treat them as electrical faults until proven otherwise. Check for a stored code, then trace the switch and solenoid circuit through the harness drawing for your build 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 in two lines: the T4.80F, T4.90F, T4.100F and T4.110F orchard tractors and the T4.80LP, T4.90LP, T4.100LP and T4.110LP low-profile tractors. The front matter lists a separate serial-number range for the cab and the cabless build of each, so identify yours before you follow a procedure or pick a harness drawing.
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 draft control build 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 there is a 10 bar calibrated valve in the lift circuit. Other builds run a main relief of 180 to 185 bar. Identify your schematic before you set a valve.
Which pumps are fitted?
Fixed displacement pumps, one at 25.00 cm3 per revolution (1.53 in3/rev) and one at 14.00 cm3 per revolution (0.85 in3/rev). The hydraulic section shows them on the schematic for each transmission and lift build together with the relief settings, so you can see which pump feeds which circuit on your tractor.
Does it cover the fault codes and the wiring?
Yes, and that is the bulk of it. Harness drawings, connector diagrams and pin-out tables run from page 1443 to page 2099, the cab and engine control circuits with the starting, charging and module coverage from 2100 to 2644, and the fault-code index and tables from 2645 to 3352, including faults such as an error state on comparing solenoid energizing times, each with its guided diagnostic.
How big is the manual and can I search it?
It is 3575 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.
Is this New Holland T4.80F, T4.90F, T4.100F, T4.110F, T4.80LP, T4.90LP?
A 3575-page Service Manual in searchable PDF format (193 MB), available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print specific sections of this New Holland T4.80F, T4.90F, T4.100F?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
