Description

New Holland 667TA 2006 Repair Manual – Engine Overhaul Specs

If you’re tearing into a New Holland 667TA 2006 Repair Manual engine, you already know the cost of guessing. I’ve seen guys bolt up a cylinder head with aftermarket torque specs and lose a head gasket inside 50 hours. That’s junk. This 150-page factory publication from CNH America LLC gives you the numbers they used on the assembly line. Chapter 2 alone runs from engine properties through the common rail system, and page 2-14 lists every torque specification you need to keep that engine sealed. You don’t get that from a third-party PDF.

Diagnostics start in Chapter 1 with the CNH-EST diagnostic tool and a proper troubleshooting procedure. If the electronic control unit (EDC7UC31) is throwing faults, you follow the manual’s logic, not your gut. I’ve worked enough combines to know the difference between a fuel pressure issue and a sensor failure. Page 1-3 tells you how to connect the tool. Don’t skip it.

7 Systems Detailed in Chapter 2

Chapter 2 of this manual covers the 667TA engine overhaul from crank gear components to the high pressure common rail injection system. Here’s what you get:

• Engine properties and coding of source engines (pages 2-5 through 2-6)
• Crankshaft, cylinder assembly, and valve gear specs
• EGR exhaust gas recirculation system (page 2-22)
• Engine lubrication and cooling sections (pages 2-30 and 2-35)
• High pressure electronic injection system – common rail, pressure relief valve, electro-injector
• Fuel supply system and checks (pages 2-67 to 2-72)
• Engine overhaul on the bench with crankcase checks

Every subsection has exploded views and step-by-step procedures written for someone who holds a wrench, not a mouse. You want to rebuild a 667TA? This is the only document you need open on the bench.

Why the OEM Torque Specifications Matter

I’ve used aftermarket manuals that claim “torque to 80 ft-lbs,” but they don’t tell you the sequence or whether to oil the threads. Page 2-14 in this manual gives you the exact values in imperial units – foot-pounds and inch-pounds – with the tightening order for cylinder head bolts, main bearing caps, and connecting rods. The special tool list on page 2-16 tells you exactly which puller, press, or adapter you need. Without OEM numbers, you risk thread galling or uneven clamp load. Period.

Does This Manual Cover the Common Rail System?

Yes. The high pressure electronic injection system is detailed from page 2-37 through 2-55. That includes the EDC7UC31 control unit operation, common rail pressure relief valve, electro-injector removal and installation, and location of all main electrical components. If your 667TA has a rail pressure fault (P0087 or similar), the troubleshooting in Chapter 1 combined with the fuel system check procedure on page 2-67 will pin it down. No guesswork.

Related manuals you might need: New Holland MH2.6, MH3.6 Repair Manual – 915-Page OEM Factory Specs covers larger engines for other models. For the compact tractor line, check New Holland LM 1343 TURBO 2006 Repair Manual – 117 Pages. And if you need the industrial engine family, New Holland F4GE0484E F4GE0684F F4HE0684J F4AE0684K F4AE0684L 2005 Repair Manual shares many of the same fuel system components.

For transmission work separate from this engine manual, refer to external resources on Manual Transmission fundamentals; this book keeps its focus on the power plant.

Get the Right Special Tools Before You Start

Flip to page 2-16 and you’ll see a list of special tools required for the overhaul. This includes injector pullers, bearing driver sets, and torque angle gauges. I’ve watched guys try to finesse a common rail injector out with a pickle fork and wreck the nozzle. Buy or rent the proper tool. The manual lists the CNH part numbers – no substitutions. If you’re a home garage guy, your local New Holland dealer can order them, or you can find aftermarket equivalents that match the specs. But don’t skip this step. It saves you a teardown later.

Source Validity: Factory Print vs Aftermarket

This is the original 2006 publication from CNH America LLC, issued November 2006, book number 87519804 NA. It covers six engine variants: 667TA/EEG, /EEC, /EBF, /EED, /EBJ, /EDJ. The copyright page (page 2 of the PDF) explicitly states CNH reserves the right to make design changes – meaning the manual is tied to the production period. Aftermarket manuals repackage data from unknown sources. I’ve found wiring diagrams that don’t match pin colors. Stick with the OEM print.

Frequently Asked Questions

What year and models does this manual cover?

2006 New Holland 667TA engine variants with EEG, EEC, EBF, EED, EBJ, and EDJ suffixes.

Does it include torque specs for all engine fasteners?

Page 2-14 has a dedicated torque specification table covering cylinder head, main bearings, connecting rods, flywheel, and injection pump mounting. Values are in foot-pounds and inch-pounds. The manual also includes the tightening angle where required – critical for TTY bolts on the 667TA common rail engine.

Is the manual printed or digital?

You are purchasing a digital access in PDF format. It is a direct scan of the factory printed manual, not a re-typed copy. Every page matches the original 2006 issue.

Will this help me diagnose a no-start condition on my 667TA?

Start with Chapter 1 – diagnostics. The CNH-EST tool connection procedure on page 1-3 lets you pull active codes. Then use the troubleshooting tree on page 1-4 to isolate fuel system, electrical, or compression issues. The common rail pressure relief valve and electro-injector testing procedures in Chapter 2 will verify injector return flow and rail pressure decay. Yes, it will.

Running a shop or fixing your own equipment, you need the numbers that came from the factory. Every time I open this manual I find something I forgot – like the specific oil cooler torque sequence on the 667TA. Don’t trust memory. Access the Factory Manual and keep it within arm’s reach of the workbench.