Description

New Holland T6.120, T6.140, T6.150, T6.155, T6.160 2014 Service Manual

You’ve got a New Holland T6.120, T6.140, T6.150, T6.155, or T6.160 sitting in the shop, and you need to tear into it. Maybe the Engine is throwing a code from the DEF system. Maybe the Transmission is slipping between ranges on the Semi-Powershift. You don’t want to guess the torque sequence on the head bolts or chase a wiring short in the Electrical system by trial and error. That’s why this Service Manual exists. Printed in February 2014 by CNH Industrial, it’s the same binder the dealer techs use. 3823 pages of factory procedures, running from page 10 for the Engine section all the way through page 90 for bodywork. I’ve been under hoods for 28 years, and I still reach for the OEM book before I reach for my ratchet.

Engine Overhaul – Torque Sequences on Page 10

The Engine chapter (page 10) splits into ten sub-sections: crankcase, fuel tanks, fuel injection, air cleaners, turbocharger, intake/exhaust manifolds, SCR exhaust treatment (the DEF side), cooling system, fan, and aftercooler. If you’re pulling the F4DFE413* series powerplant, you need the factory torque values for the cylinder head bolts and the main bearing caps. This manual gives them in imperial ft-lb, not some generic range. You also get the bleed-down procedure for the high-pressure common rail system – something a lot of aftermarket books skip because they don’t want to print the warning about fuel injection pressures over 30,000 psi. Page 10.1 covers the engine and crankcase disassembly step-by-step. Don’t skip the note about reusing stretch bolts; it’s spelled out in plain English.

Transmission: Power Shuttle and Semi-Powershift

Two transmission options live inside these T6 tractors: the Power Shuttle (section 21.112) and the Semi-Powershift (section 21.111). Each has its own hydraulic control circuit and internal components. The manual walks you through the external control linkage adjustments for the Power Shuttle and the lubrication system for the Semi-Powershift. Page 21 shows the hydraulic pressure test points and the solenoid resistances. If the tractor won’t shift out of neutral, you check the range-engagement solenoid before you pull the top cover. That kind of diagnostic sequence is exactly what saves you from pulling a transmission that didn’t need it. The manual also covers the continuity of the transmission control unit wiring – no schematic guessing.

Electrical Systems – What’s Covered on Page 55

The Electrical systems chapter starts on page 55 and runs through multiple sub-sections: starting, charging, lighting, instrumentation, and the electronic control modules. You get full wiring diagrams with wire colors and connector pinouts. Need the charge pressure for the alternator? It’s in there. Need the resistance values for the fuel level sender? Page 55.5. This section includes the diagnostic trouble code (DTC) tables for the engine ECU and the transmission controller. If you’re chasing an intermittent no-crank, the manual shows you the starter relay circuit and the safety switch logic. No third-party redraws. This is the original factory schematic.

7 Systems Where the OEM Spec Keeps You Safe

Here’s a short list of chapters that, in my experience, get fumbled most when someone uses a generic manual:

• Brakes and controls (page 33) – brake pedal free-play adjustment and the shuttle-shift interlock.
• Hydraulic systems (page 35) – remote valve pressure settings and flow rates for the 4WD PTO clutch.
• Power Take-Off (PTO) (page 31) – engagement sequence and the clutch pack clearance.
• Steering (page 41) – orbital valve rebuild and cylinder rod seal replacement.
• Four-Wheel Drive system (page 23) – front axle disengagement fork adjustment.
• Cab climate control (page 50) – A/C compressor clutch gap and refrigerant charge.
• Front axle system (page 25) – kingpin bearing preload and toe-in specification.

Each chapter has its own index at the start, so you don’t page through all 3823 pages blind.

Who Should Use This Manual?

If you own a T6.120, T6.140, T6.150, T6.155, or T6.160 and you do your own maintenance, this is the only book you need. It also fits the AutoCommand variants (those with the CVT transmission). A farm owner who changes his own engine oil and hydraulic filters will use the service intervals in the Introduction. A shop tech who rebuilds a whole engine uses every page. And anyone who’s ever bought a Sperry New Holland 31 33 36 Service Manual – OEM Factory Specs knows they can trust the OEM lineage. The manual even includes a Special Tool Index at the end, so you know exactly which pullers and adapters to rent or buy before you start.

Why Factory Documentation Beats Aftermarket Copies

I’ve seen aftermarket manuals that combine five different tractor models into one paperback and call it “universal.” They recycle the same generic wiring diagram for a generator that doesn’t even use a voltage regulator. This New Holland manual is printed by CNH Industrial and carries part number 47665859. Every torque spec, every hydraulic flow rate, every electrical connector view was photographed and measured off the actual production tractor. No third-party redraws. No assumptions. If you’re working on the Transmission section, the step order matches the assembly line sequence. That matters when you’re stacking clutches and plates. For comparison, take a look at the New Holland T7510-T7550 2013 Service Manual – Factory Specs and you’ll see the same level of detail. If you need a smaller frame from the same era, the New Holland T5.95, T5.105, T5.115 2013 Service Manual – 2173 Pages also follows the same factory format.

Things to Know Before You Access

This is a digital PDF. Full searchable text – not a scanned image dump. You can search for “turbocharger” and land on page 10.5. The file size is substantial because every page is high resolution, but you can load it on a tablet in the cab. No DRM lock. It’s the exact same file the dealer techs get on their laptops.

Does this manual cover both the Power Shuttle and Semi-Powershift transmissions?

Yes. Section 21 covers the Power Shuttle (pages 21.1–21.3) and the Semi-Powershift (pages 21.4–21.7), including the Continuously Variable Transmission (CVT) variant on the AutoCommand models.

Are the torque specs in inch-pounds or foot-pounds?

Both, depending on the fastener. Engine and drivetrain specs are in ft-lb (e.g., M14 cylinder head bolts at 110 ft-lb). Small electrical and sensor bolts are in in-lb. The manual states both Imperial and metric units throughout.

Can I use this manual for the T6.165 and T6.175 models?

Yes, those models are listed on page 1 and page 2 of the manual. The engine and transmission differences are noted in the product table on page 3.

What about the SCR / DEF system?

Section 10.500 is dedicated to Selective Catalytic Reduction exhaust treatment. It covers the DEF injector, NOx sensors, and the regeneration procedure. That’s about 40 pages of diagnostics you won’t find in a generic manual.

Look, I don’t sell books that sit on a shelf. Access the Factory Manual and put it on the tablet next to your tool box. The first time you trace a wiring fault in the electrical system or set the PTO engagement pressure correctly, you’ll know why I push OEM documentation. This is the same document New Holland techs use – 3823 pages, factory correct, and ready to save you a second trip to the parts counter.