Part of the New Holland Repair Manuals.
Maybe one remote valve has gone dead, the creeper will not engage, or a fault code shows on the dash. This New Holland service manual, part number 51675244 from September 2019, covers the T6.125, T6.145, T6.155, T6.165, T6.175 and T6.180 Standard. It also covers the T6.145, T6.155, T6.165 and T6.175 AutoCommand Sidewinder II, all Tier 4B (final) North America builds.
It covers the 4485 cm³ four cylinder and 6728 cm³ six cylinder engines with SCR, the 16x16 Semi-Powershift and the CVT. Axles, PTO, brakes, three-point hitch, steering and cab climate control are covered too.
The Harnesses and connectors section carries the electrical schematic sheets, the Hydraulic systems section carries the hydraulic schemas, and the FAULT CODES - DTC section gives causes and diagnostic procedures.
What's Inside This New Holland T6.125–T6.180 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Specifications | 1-40 | Model Applicability, Safety Rules, Lubricants and Coolants, Capacities, Engine Specifications, Product Identification |
| Engine | 41-360 | Engine and Crankcase, Fuel Tanks, Air Cleaners, Intake and Exhaust, SCR Exhaust Treatment, Cooling System, Aftercooler, Lubrication |
| Clutch | 361-368 | Flywheel Damper, Four-Cylinder Application, Six-Cylinder Application, Damper Bolt Torque |
| Transmission | 369-854 | Semi-Powershift Transmission, External Controls, Hydraulic Components, Internal Components, CVT, Creeper, Overdrive, Pressure Testing |
| Four-Wheel Drive (4WD) System | 855-916 | Electro-Hydraulic Control, Dog Clutch, Multi-Plate Clutch, Internal Oil Lines, Drive Shaft, Troubleshooting |
| Front Axle System | 917-1240 | Powered Front Axle, Bevel Gear Set, Differential, Final Drive Hubs, Steering Knuckles, Suspension Control, Non-Powered Front Axle |
| Rear Axle System | 1241-1356 | Powered Rear Axle, Bevel Gears, Differential Lock, Planetary Gears, Final Drives, Troubleshooting |
| Power Take-Off (PTO) | 1357-1480 | Rear Electro-Hydraulic Control, Two-Speed and Three-Speed Rear PTO, Front PTO Control, Front PTO, Troubleshooting |
| Brakes and Controls | 1481-1618 | Hydraulic Service Brakes, Parking Brake, Parking Lock, Hydraulic and Pneumatic Trailer Brakes, Front Axle Brake |
| Hydraulic Systems | 1619-1942 | Hydraulic Schemas, Reservoir and Filters, Fixed and Variable Displacement Pumps, Charge Pump, Remote Control Valves, Three-Point Hitch, Priority Valves |
| Hitches, Drawbars and Implement Couplings | 1943-1960 | Rear Three-Point Hitch Linkage, Top Link Arm, Hydraulic Right-Hand Vertical Rod, Front Hitch |
| Frames and Ballasting | 1961-2036 | Frame, Ballasts and Supports, Front Axle Support, Removal, Installation, Tightening Torque |
| Steering | 2037-2132 | Steering Control, Tie Rods, Hydraulic Control Components, Steering Pump, Cylinders, Autoguidance Steering |
| Wheels | 2133-2148 | Front Wheels, Rear Wheels, Flanged Axle, Bar Axle, Disc-To-Hub Nuts, Disc-To-Rim Nuts |
| Cab Climate Control | 2149-2248 | Heating, Cab Air Filters, Air Conditioning, Compressor, Magnetic Clutch, Condenser, Evaporator, Troubleshooting |
| Harnesses, Schematic Sheets and Connectors | 2249-3901 | Electrical System Data, Harness and Connector Views, Electrical Schematic Sheets, Power Distribution, Engine and Transmission Wiring, CAN Bus |
| Engine Electrical Controls | 3902-4011 | Engine Control System, Alternator, Battery, Exhaust Flap Actuator, SCR Electrical System, Humidity and NOx Sensors |
| Electronic Modules | 4012-4413 | H-Menu Configuration, Instrument Control Unit, Central Control Unit, Armrest Control Unit, Universal Controller, CAN Data Bus, Calibrations |
| Transmission, PTO, Brake and Cab Electrical Controls | 4414-4717 | Transmission Control, Speed and Pressure Sensors, Rear PTO Control, Parking Brake Electrics, HVAC and Steering Controls, Hitch Control, Warning Instruments |
| Fault Codes (DTC) | 4718-6592 | Wheel Speed and Radar Faults, Hitch Sensors, Hydraulic Valve Solenoids, Transmission Controls, Sensor Reference Supplies, Module Faults, Diagnostic Procedures |
| Platform, Cab and Bodywork | 6593-6689 | Cab, Windshield and Windows, Engine Hood, Panels, Removal, Installation |
| Special Tool Index | 6690-6711 | Tractor Splitting Stand, Engine Lifting Brackets, Hitch Line Release Tools, Tool Reference Numbers, Procedure Page References |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel tank | 197.5 L (52.2 US gal) | p. 36 |
| DEF/AdBlue® tank | 39.5 L (10.4 US gal) | p. 36 |
| Cooling system | 21.0 L (5.5 US gal) | p. 36 |
| Engine oil including filter (4-cylinder models) | 10.0 L (2.6 US gal) | p. 36 |
| Transmission / Rear axle / Hydraulics | 62.0 L (16.4 US gal) | p. 36 |
| 4WD front axle - Differential | 9.0 L (2.38 US gal) | p. 36 |
| 4WD front hubs (Class 3 axle - With brakes) | 3.0 L (0.79 US gal) | p. 36 |
| 4WD front hubs (Class 4 axle - With brakes) | 4.0 L (1.06 US gal) | p. 36 |
| Engine displacement (T6.125-T6.175, 4 cylinder) | 4485 cm³ (274 in³) | p. 37 |
| Engine displacement (T6.180, 6 cylinder) | 6728 cm³ | p. 37 |
| Rated engine speed | 2100 RPM | p. 37 |
| Valve tappet clearance (cold) - Intake | 0.25 mm (0.010 in) | p. 37 |
| Valve tappet clearance (cold) - Exhaust | 0.51 mm (0.020 in) | p. 37 |
| Variable displacement pump output at engine 2200 RPM (AutoCommand) | 125 L/min (33 US gpm) | p. 1628 |
| Variable displacement pump maximum pressure (AutoCommand) | 205 - 215 bar (2972 - 3118 psi) | p. 1628 |
| Charge pump output at engine 2200 RPM (AutoCommand) | 163 L/min (43 US gpm) | p. 1628 |
| Front wheels - Disc to hub nuts | 279 Nm (206 lb ft) | p. 2136 |
| Rear wheels, flanged axle - Disc to hub nuts | 341 Nm (252 lb ft) | p. 2142 |
| Rear wheels, bar axle - Disc to hub nuts | 500 Nm (369 lb ft) | p. 2142 |
| Air conditioning refrigerant filling | 1200 g (42.33 oz) | p. 2175 |
New Holland T6.125–T6.180 Common Problems This Manual Covers
AutoCommand tractor logs fault code 1004 - Wheel speed sensor - signal too high
In the Fault Codes (DTC) section, 1004 is listed against the UCM on AutoCommand tractors. One printed cause is a faulty speed pickup gear, not only the sensor itself. If any damage is indicated, the manual says to disassemble the rear axle and replace the speed pickup gear.
Manual Section: Electrical systems - FAULT CODES p. 4768Fault code 1024 - Perform the hydraulic lift calibration
Code 1024 is raised by the CCU, and the printed cause is a hydraulic lift that has not been calibrated. The Fault Codes (DTC) section sends you to the hydraulic lift calibration procedure, and the Electronic Modules section covers calibrations.
Manual Section: Electrical systems - FAULT CODES p. 4833Creeper will not engage
Go to Creeper - Troubleshooting in the Transmission section. It lists a faulty creeper engagement switch as a cause and calls for installing a new switch. The Transmission section also covers the creeper itself, so you have the creeper procedures on hand if the switch is not the whole story.
Manual Section: Creeper - Troubleshooting p. 814One remote control valve does not operate
Remote control valve troubleshooting is in the Hydraulic Systems section. For one remote control valve that does not operate, it lists a broken cable as a cause, and the fix is to replace the cable. The same section also covers the remote control valves themselves, so the valve procedures are on hand if the cable is not the whole story.
Manual Section: Remote control valve - Troubleshooting p. 1878Frequently Asked Questions
Which New Holland T6 tractors does this service manual cover?
It covers the T6.125, T6.145, T6.155, T6.165, T6.175 and T6.180 Standard models. It also covers the T6.145, T6.155, T6.165 and T6.175 AutoCommand Sidewinder II. All are Tier 4B (final) North America tractors under part number 51675244, dated September 2019. Standard models run the Semi-Powershift, and AutoCommand models run the CVT. p. 2
What are the fuel, DEF and transmission/hydraulic capacities on these T6 Tier 4B tractors?
The fuel tank holds 197.5 L (52.2 US gal) and the DEF/AdBlue® tank holds 39.5 L (10.4 US gal). The transmission, rear axle and hydraulics share 62.0 L (16.4 US gal). The cooling system takes 21.0 L (5.5 US gal). On the four cylinder models, engine oil with the filter is 10.0 L (2.6 US gal). p. 36
What output and maximum pressure should the variable displacement pump make on the New Holland T6.145–T6.175 AutoCommand?
On the AutoCommand T6.145 through T6.175, the variable displacement pump should deliver 125 L/min (33 US gpm) at 2200 engine RPM. Maximum pressure is 205 - 215 bar (2972 - 3118 psi). The charge pump should give 163 L/min (43 US gpm) at the same engine speed. p. 1628
What are the wheel nut torques on the T6.125 to T6.180?
Front wheel disc to hub nuts take 279 Nm (206 lb ft). At the rear, disc to hub nuts on the flanged axle take 341 Nm (252 lb ft). On the bar axle they take 500 Nm (369 lb ft). p. 2142
Does the manual include wiring diagrams, hydraulic schematics and fault codes?
Yes. The Harnesses and connectors section carries electrical schematic sheets such as 01 - POWER DISTRIBUTION, 12 - ENGINE CONTROL UNIT 1 and 23 - INSTRUMENT CLUSTER 1. Hydraulic schemas include the 16x16 with fixed displacement pump, plus all variants and basic variants. A FAULT CODES - DTC section gives causes and diagnostic procedures. p. 2319
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