Part of the New Holland Repair Manuals.
Covers the New Holland T8.275, T8.300, T8.330, T8.360, T8.390 and T8.420 with the CVT (Auto Command) transmission, PIN ZCRC02586 and above. This is part number 47533595, in English, dated May 2013, for the 9.0 l engine. The same file carries the December 2013 supplement 47533595S1 for tractors with transmission serial AJB0606248 and after.
The book starts with torque tables and fluid capacities. It then works through the engine, CVT, front axle, PTO, brakes, hydraulics, three-point hitch, steering and cab climate. The electrical and fault code section is the biggest part, about 2360 of 4800 pages.
What's Inside This New Holland T8.275–T8.420 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Specifications | 1-21 | Contents, Safety Rules, Servicing Instructions, Assembly Torque Tables, Fluid Capacities |
| Engine and Power Coupling | 22-217 | Engine Removal and Installation, Cylinder Heads, Pump Drives, Air Cleaners and Fuel Tanks, Cooling and Fan Drive, SCR Exhaust Treatment, Drive Shaft |
| CVT Transmission | 218-467 | CVT Operation, Engine/Transmission Splitting, Hydrostatic Unit, Clutch Control Valves, Shafts and Gears, Bearing Plates, Lubrication Accumulator |
| Four-Wheel Drive, Front and Rear Axles | 468-871 | Electro-Hydraulic 4WD Control, Front Bevel Gears and Differential, Wheel Hubs and Steering Knuckles, Axle Suspension, Rear Differential, Planetary Final Drives |
| Power Take-Off (PTO) | 872-1105 | Rear Electro-Hydraulic Control, One-Speed and Two-Speed Rear PTO, Front PTO, Clutch Repair, Valve Operation, Troubleshooting and Testing |
| Brakes and Controls | 1106-1269 | Parking Brake and Lock, Hydraulic Service Brakes, Brake Pedal Valve, Hydraulic and Pneumatic Trailer Brakes, Pressure Testing |
| Hydraulic Systems and Pneumatic System | 1270-1509 | CVT Hydraulic Schematics, Pump Control Valves, PFC Pumps, Hitch Valves, Remote Control Valves, Reservoirs, Coolers and Filters, Charge/Lubrication Pumps, Air Compressor |
| Hitches, Drawbars and Implement Couplings | 1510-1543 | Rear Three-Point Hitch, Category III/IIIN and IVN Hitch, Hitch Coupler, Draft Control, Front Hitch |
| Steering | 1544-1585 | Steering Control, Steering Column, Hydraulic Control Components, Relief Valve Pressure Tests, Troubleshooting, Steering Pump |
| Cab Climate Control | 1586-1725 | Heating, Air Conditioning, Refrigerant Recovery and Charging, Compressor, Automatic Temperature Control, Cab Pressurizing |
| Electrical - Engine, Transmission, Axle and HVAC Controls | 1726-1823 | Engine Cooling and Engine Control, Transmission Control, Front and Rear Axle Control, HVAC and Cab HVAC Controls |
| Electrical - Wiring Schematic Frames | 1824-2015 | Power Distribution and Fuses, Electronic Engine, CVT Controls, Remote Valves and Hitch, Lighting and HVAC, CAN and ISO 11783, Harness Index |
| Electrical - Connectors and Pinouts | 2016-2601 | Connector Component Diagrams, FPT EDC7 ECU Connectors, CVT Connector Pinouts, Wire Numbers, Chassis and Cab Harnesses, Fuse and Relay Box |
| Electrical - Hitch, Starting, Charging, Lighting and Modules | 2602-2845 | Hitch Electronic Control, Engine Starting, Alternator and Battery, External Lighting, Instruments and Alarms, Cab Controls and Wipers, Electronic Modules, SCR Electrical System |
| Fault Codes (DTC) - Suspension, Hitch, HVAC and Steering | 2846-3377 | Fault Code Contents, Front Suspension Faults, Hitch and Draft-Control Faults, HVAC Faults, Transmission Oil and Steering Faults, ECU and DCU Faults |
| Fault Codes (DTC) - Transmission, Engine, SCR and PTO | 3378-4085 | Reference Voltage, Transmission Pressure and Clutch Calibration, CVT Control Faults, Engine Sensor Diagnostics, SCR Faults, PTO and MFD Faults, Fault-Code Index |
| Platform, Cab, Bodywork and Decals | 4086-4253 | Engine Hood and Panels, Shields and Latches, Footboards, Operator Seat, Cab, Cab Interior Trim and Panels |
| Special Tool Index | 4254-4269 | Tool Part Numbers, Repair-Operation References, Splitting Stands, Bearing Sockets, Clutch Tools, Diagnostic Kits; Supplement 47533595S1 Cover |
| Supplement S1 - CVT Transmission (Serial AJB0606248 and After) | 4270-4553 | CVT Specifications and Operation, Component Identification, Hydrostatic Top-Cover Repair, External Controls, Internal Components, Lubrication |
| Supplement S1 - Hydraulic Systems | 4554-4794 | Hydraulic Schematics 47451828 and 47605415, Hydraulic Symbols, Regulator and Priority Valves, Regulator Repair, PFC Pump Tests, Hitch Hydraulics, Remote Valves, Pump Units |
| Supplement S1 - Hydraulic Schematic Sheets 1-6 | 4795-4800 | Schematic 47605415, Power Beyond, Megaflow, European Hydraulic Trailer Brakes, Secondary Steering, Autoguidance, Component Legends |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine oil capacity (with or without filter change) | 25 l (6.6 US gal / 5.5 UK gal) | p. 20 |
| Cooling system capacity | 26.5 l (7 US gal / 5.8 UK gal) | p. 20 |
| Auto Command transmission/hydraulic system capacity, standard rear axle | 187 l (49.5 US gal / 41.25 UK gal) | p. 20 |
| Auto Command transmission/hydraulic system capacity, heavy duty rear axle | 206 l (54.5 US gal / 45.4 UK gal) | p. 20 |
| Fuel tank capacity | 636 l (168 US gal / 140 UK gal) | p. 20 |
| Front axle differential capacity (New Holland 4.75 / 5.0 fixed and saddle suspended axle) | 17.5 l (18.5 US qt / 30.8 UK pt) | p. 20 |
| Front axle planetary capacity, each (New Holland 5.0 fixed and saddle suspended axle) | 4.5 l (9.5 US pt / 8 UK pt) | p. 20 |
| C1-C4 clutch regulated supply pressure | 22.4 - 24.5 bar (325 - 355 psi) | p. 317 |
| CVT regulated-pressure accumulator nitrogen charge pressure | 9.7 - 10.3 bar (141 - 150 psi) | p. 462 |
| Front suspension cylinder accumulator nitrogen charge pressure | 59 - 62 bar (856 - 899 psi) | p. 716 |
| R134A refrigerant charge | 2.1 kg (4.63 lb) | p. 1605 |
| Parking brake clutch pressure test | 2413 kPa (350 psi) | p. 1162 |
| Inlet charge and lubrication pressure limit (lube regulator valve) | 4.8 bar (70 psi) | p. 1311 |
| Standard PFC pump maximum flow at rated speed | 166.0 l/min (44.0 US gpm) | p. 1305 |
| Optional high flow PFC pump maximum flow at rated speed | 224 l/min (59.0 US gpm) | p. 1305 |
| Optional Megaflow PFC pump maximum flow at rated speed | 118 l/min (31.0 US gpm) | p. 1306 |
| Transmission front housing mounting bolts tightening torque | 520 N·m (383.5 lb ft) | p. 309 |
| Hydrostatic unit top cover mounting bolts tightening torque | 265 N·m (195.5 lb ft) | p. 303 |
| One-speed rear PTO output-shaft housing bolts tightening torque | 90 - 100 Nm (66 - 74 lb ft) | p. 899 |
| Service brake friction plate minimum thickness (T8.420 heavy duty rear axle) | 3.45 mm (0.136 in) | p. 1167 |
New Holland T8.275–T8.420 Series Common Problems This Manual Covers
One-speed rear PTO does not engage
The book lists a fault in the electrical control circuit as the possible cause. The correction is to test the control circuit, using Power Take-Off (PTO) clutch - Testing - Test 1 (31.110). The case is in the troubleshooting chart for the one-speed rear Power Take-Off (PTO) clutch.
Manual Section: Power Take-Off (PTO) clutch - Troubleshooting p. 973Fault code 2023 System pressure critically low (CVT transmission)
The code sets when system pressure stays below 16 bar (232.0 psi) for 1 s, with engine speed above 800 RPM for 10 s. If no other error codes are active, the cause is low regulated pressure. Follow the repair manual instructions to adjust regulated pressure.
Manual Section: 2023-System pressure critically low p. 3392Low flow from all remote valve sections on the dual flow pressure/flow compensating pump
Run the flow test on remote valves 4, 5 and 6 at 2000 RPM. Set the load valve to 69 bar (1000 psi) and have the oil at 49 °C (120 °F) or above. If every remote valve section delivers under 98.8 l/min (26.1 US gpm), the pump has lost efficiency. Consider replacing the pump.
Manual Section: Pump Dual flow pressure/flow compensating pump - Flow test p. 1394Slow or sluggish steering (T8.275 to T8.390)
The troubleshooting chart for the steering hydraulic control components lists steering relief pressure not adjusted correctly, and a stuck steering priority spool or a broken spool spring, as causes. The correction is to repair or replace the spool if required. Note that this procedure lists only T8.275 to T8.390.
Manual Section: Hydraulic control components - Troubleshooting p. 1569Frequently Asked Questions
Which tractors does the New Holland T8.275-T8.420 CVT service manual cover?
It covers the T8.275, T8.300, T8.330, T8.360, T8.390 and T8.420 CVT, PIN ZCRC02586 and above. The part number is 47533595, dated May 2013, and no upper serial limit is printed. Many procedures list only T8.275 to T8.390, so check the applicability line at the top of each procedure before you start. The December 2013 supplement 47533595S1 is in the same file. It covers tractors with transmission serial AJB0606248 and after and includes revised CVT and hydraulic sections. p. 1
How much oil does the Auto Command transmission and hydraulic system of a New Holland T8 CVT take?
The transmission and hydraulics share one system, and the fill depends on the rear axle. With the standard rear axle it takes 187 l (49.5 US gal / 41.25 UK gal). With the heavy duty rear axle it takes 206 l (54.5 US gal / 45.4 UK gal). p. 20
What are the fuel tank and cooling system capacities of the New Holland T8.275-T8.420?
The fuel tank holds 636 l (168 US gal / 140 UK gal). The cooling system takes 26.5 l (7 US gal / 5.8 UK gal). Engine oil is 25 l (6.6 US gal / 5.5 UK gal), with or without a filter change. All three are in the capacities table in the introduction. p. 1305
What are the PFC hydraulic pump flow rates on the New Holland T8.275-T8.420 CVT?
Maximum flow at rated speed is 166.0 l/min (44.0 US gpm) for the standard PFC pump. The optional high flow pump gives 224 l/min (59.0 US gpm). The optional Megaflow pump gives 118 l/min (31.0 US gpm). The rated engine speed is not printed next to these figures. The hydraulic section includes pump flow tests. p. 1305
Does the New Holland T8.275-T8.420 service manual include wiring diagrams, hydraulic schematics and fault codes?
Yes, all three. Wire harness schematic frames start at p.1839, for example frame 01 Power distribution and frame 81 Primary CAN bus. Hydraulic schematic 47451828 starts at p.1275. Schematic 47605415, for transmission serial AJB0606248 and after, starts at p.4570, with six fold-out sheets at the end of the file. The fault code section starts at p.2846 and has an index, for example 10004 Front suspension position sensor out of range high. p. 2846
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