New Holland 667TA/EEG Operating instructions

ENGINE REPAIR MANUAL
667TA/EEG
667TA/EEC
667TA/EBF
667TA/EED
667TA/EBJ
667TA/EDJ
Issued 11-2006
Book/Form Number 87519804 NA
Copyright © 2006. CNH America LLC. All Rights Reserved.
Printed in U.S.A. • Bur
Source Code No. unknown

ENGINE REPAIR MANUAL
CNH America LLC reserves the right to make improvements in design or changes in specifications at any time without incurring any
obligation to install them on units previously sold.
All data given in this publication is subject to production variations. Dimensions and weights are only approximate. Illustrations do
not necessarily show products in standard condition. For exact information about any particular product, please consult your Dealer
Revision History
Issue Issue Date Applicable Machine Remarks
First Edition 11-2006 667TA/EEG 667TA/EEC 667TA/EBF
667TA/EED 667TA/EBJ 667TA/EDJ 87519804 NA

I
Issued 11-06 Bur
ENGINE REPAIR MANUAL
ENGINE REPAIR MANUAL
TABLE OF CONTENTS
CHAPTER 1
DIAGNOSTICS
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
CNH- EST DIAGNOSTIC TOOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
CHAPTER 2
667TA ENGINE OVERHAUL
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
CODING OF SOURCE ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
ENGINE PROPERTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
GENERAL ENGINE FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
CRANK GEAR COMPONENTS AND CYLINDER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
VALVE GEAR - CYLINDER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
TORQUE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
667TA ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
DESCRIPTION OF MAIN ENGINE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
EGR EXHAUST GAS RECIRCULATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
ENGINE LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
ENGINE COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
HIGH PRESSURE ELECTRONIC INJECTION SYSTEM (COMMON RAIL) . . . . . . . . . . . . . . . . . . . . . . 2-37
EDC7UC31 -ELECTRONIC CONTROL UNIT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
FUEL SUPPLY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
COMMON RAIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
COMMON RAIL PRESSURE RELIEF VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
ELECTRO-INJECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52
LOCATION OF THE MAIN ELECTRICAL COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
CHECKING THE FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
ENGINE OVERHAUL ON THE BENCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72
CHECKS AND SPECIFICATIONS ON ENGINE CRANKCASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82
CRANKSHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-87
ENGINE FLYWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-102
CYLINDER HEAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-107
VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-108
VALVE GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-109
VALVE SEATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-110
VALVE SPRINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112
CYLINDER HEAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112
RODS AND TAPPETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-115
CHAPTER 3
CHARGING AND START-UP
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
STARTER MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
ALTERNATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
87519804 NA

SECTION 1 - ENGINE REPAIR MANUAL
II Issued 11-06 Bur 87519804 NA
NOTES

CHAPTER 1
ENGINE REPAIR MANUAL
DIAGNOSTICS
Issued 11-2006
Book/Form Number 87519804 NA
Copyright © 2006. CNH America LLC. All Rights Reserved.
Printed in U.S.A. • Bur
Source Code No. unknown
667TA
TIER III

CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
1-II Issued 11-06 Bur 87519804 NA
CNH America LLC reserves the right to make improvements in design or changes in specifications at any time without incurring any
obligation to install them on units previously sold.
All data given in this publication is subject to production variations. Dimensions and weights are only approximate. Illustrations do
not necessarily show products in standard condition. For exact information about any particular product, please consult your Dealer
Revision History
Issue Issue Date Applicable Machines Remarks
First Edition 11-2006 667TA/EEG 667TA/EEC 667TA/EBF
667TA/EED 667TA/EBJ 667TA/EDJ 87519804 NA

1-1
Issued 11-06 Bur
ENGINE REPAIR MANUAL
CHAPTER 1
DIAGNOSTICS
TABLE OF CONTENTS
CNH- EST DIAGNOSTIC TOOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Engine Won’t Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Engine Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Engine Lacks Power And Runs Erratically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Engine Exhaust Smoke Black Or Dark Grey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Engine Exhaust Smoke Grey (Verging On White) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Engine Exhaust Smoke Light Blue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Engine Knocks Irregularly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Engine Stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Excessive Or Insufficient Oil Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Excessive Fuel Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
87519804 NA

1-2 Issued 11-06 Bur 87519804 NA
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
NOTES

1-3
87519804 NA Issued 11-06 Bur
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
CNH- EST DIAGNOSTIC TOOL
BS06K009 Figure 1-1
The EST system allows diagnoses on machines by detecting the operating parameters of electronic control
components (control units, sensors etc.) and check flow rates, pressures and temperatures. It is also capable of
reading fault codes on the engine. To help with troubleshooting the engine failure mode.

1-4 Issued 11-06 Bur 87519804 NA
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
TROUBLESHOOTING
ENGINE WON’T START
Batteries fully charged. No Perform the checks described in the
Electrical section of the Shop manual.
Yes
Connections to battery terminals are tight
and clean. No Inspect, clean, tighten or replace connections.
Yes
Starter motor working properly. No Perform the checks described in the
Electrical section of the Shop manual.
Yes
Pre-Post heating system working properly. No Check using a multi meter replace or repair.
Yes
Fuel filters plugged. Yes Replace.
No
The fuel system or injection pump shows
signs of air in system. Yes Check and repair air leaks.
No
The fuel system shows traces of water. Yes Check and clean the fuel system including
the fuel tank.
No
High pressure pump working properly. No Check using Electronic Service Tool (EST)
and repair or replace if necessary.
Yes
Injectors working properly. No
Check using Electronic Service Tool (EST).
Check O-ring seal.
Replace injectors if defective.
Yes
Compression good on all cylinders. No
Check each cylinder for proper
compression, overhaul the engine or make
repairs on defective parts (valves, piston
rings, etc.).

1-5
87519804 NA Issued 11-06 Bur
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
ENGINE OVERHEATS
Coolant level correct. No Check for leaks, repair leaks and refill to
proper level.
Yes
Fan working properly. No Replace.
Yes
Drive belts in serviceable. No Replace.
Yes
Water Pump in working properly. No Check for leaks, bad bearing, overhaul or
replace.
Yes
Thermostat working properly. No Replace.
Yes
Radiator plugged or leaking. Yes Wash down, repair leaks and flush out
radiator. If necessary replace radiator.
No
Oil in radiator fluid. Yes Replace oil cooler.
No
Air to Air Cooler and hoses leaking. Yes Clean or replace faulty parts.
No
Openings for coolant flow within the cylinder
head and engine block plugged. Yes Clean thoroughly.
No
Valve clearance correct. No Check and adjust for correct valve
clearance.
Yes
Cylinder head gasket in leaking. Yes Replace.

1-6 Issued 11-06 Bur 87519804 NA
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
ENGINE LACKS POWER AND RUNS ERRATICALLY
Air filter plugged. No Clean the filter and replace if necessary.
Yes
Fuel filters in plugged. No Replace.
Yes
Fuel system working properly. No Check and make if necessary repair.
Yes
The fuel system shows impurities and or
traces of water. Yes
Take off the hoses and injection pump,
clean and dry thoroughly, then if necessary
clean and dry the fuel tank.
No
Thermostat working properly. No Replace.
Yes
High pressure pump working properly. No Check using the Electronic Service Tool
(EST) and repair or replace if necessary.
Yes
Injectors working properly. No Check using the Electronic Service Tool
(EST) and repair or replace if necessary.
Yes
High pressure fuel side leaking. Yes Check for leaks around O-rings and
gaskets.
No
Turbocharger working properly. No Repair or replace the unit.
Yes
Correct valve clearance. No Adjust the clearance to proper value.
Yes
Compression good on all cylinders. No
Check each cylinder for proper
compression, overhaul the engine or make
repairs on defective parts (valves, piston
rings, etc.).

1-7
87519804 NA Issued 11-06 Bur
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
ENGINE EXHAUST SMOKE BLACK OR DARK GREY
ENGINE EXHAUST SMOKE GREY (VERGING ON WHITE)
ENGINE EXHAUST SMOKE LIGHT BLUE
Air filter plugged. No Clean the filter and replace if necessary.
Yes
Electronic fuel system working properly. No Check using the Electronic Service Tool
(EST) and repair or replace if necessary.
Yes
Fresh clean diesel fuel in tank. No Clean the tank and replace the fuel filter.
Yes
Compression good on all cylinders. No
Check each cylinder for proper
compression, overhaul the engine or make
repairs on defective parts (valves, piston
rings, etc.).
Injectors working properly. No Check using the Electronic Service Tool
(EST) and repair or replace if necessary.
Yes
Coolant level correct. No
Possible flow of coolant into the combustion
chamber; replace the cylinder head gasket
or overhaul the engine.
Yes
Pre-Post heating system working properly. No Check using a multi meter replace or repair.
Yes
Fresh clean diesel fuel in tank. No Clean the tank and replace the fuel filter.
Excessive oil consumption. Yes
Check: oil vapor breather, cylinder
compression. Leaks into or out of
turbocharger. Leaks from valve guides.
Overhaul cylinder head or engine if
necessary.
No
Oil contaminated with diesel fuel. Yes
Check the high pressure fuel pump O-ring,
injector O-ring for failure, or cylinder head
porosity.

1-8 Issued 11-06 Bur 87519804 NA
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
ENGINE KNOCKS IRREGULARLY
Knock detected in the crankshaft. Yes
Check the following items: Journal play and
out-of -roundness, bolt torque for main
journal caps and engine flywheel, oil
pressure. Replace the defective parts or
overhaul the engine.
No
Knock detected in the connecting rods. Yes
Check the following items: Rod journal end
play and out-of -roundness, bolt torque for
connecting rod caps, connecting rod
torsion, straightness. Replace defective
parts or overhaul the engine.
No
Knock detected in pistons. Yes
Check the following items: Play between the
pistons and the cylinder liners, integrity of
piston rings, play between the pins and the
piston hubs. Replace the defective parts or
overhaul the engine.
No
Knock detected in the cylinder head. Yes
Check the following items: Play between the
rocker arms and the valves, injection pump
timing, valve timing. Adjust to proper
specification.
No
Knock detected in valve gear. Yes
Check and replace if necessary the gears.
Inspect for broken springs, excessive play
between the stems and guides, and the
tappets and seats. Adjust the clearance.
No
Knock detected in injectors. Yes Check using the Electronic Service Tool
(EST) and repair or replace if necessary.
No
Knock detected in the engine flywheel. Yes Replace loose screws and tighten all
screws to the specified torque and angles.

1-9
87519804 NA Issued 11-06 Bur
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
ENGINE STOPS
EXCESSIVE OR INSUFFICIENT OIL PRESSURE
EXCESSIVE FUEL CONSUMPTION
Fuel tank filled. No Refuel and drain if necessary.
Yes
Fuel filters plugged. Yes Replace.
No
Fuel system in working properly. No Check the circuit and make necessary
adjustments or repairs.
Yes
Valve timing correct. No Make necessary adjustments.
Oil pressure control valve working properly. No Check and replace if necessary.
Yes
Proper engine oil SAE viscosity. No Replace engine oil with proper viscosity oil.
Yes
Oil pump delivering proper pressure. No Check and replace if necessary.
Yes
Main bearings and connecting rod bearings
in acceptable condition. No Replace the bearings and reface if necessary the crankshaft.
Fuel tank and lines leaking. Yes Repair leaks (if any) and replace the worn
parts.
No
After cooler leaking. No Replace.
Yes
Electronic fuel injection system operating
properly. No
Check using the Electronic Service Tool
(EST) and repair or replace if necessary.

1-10 Issued 11-06 Bur 87519804 NA
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
NOTES

CHAPTER 2
ENGINE REPAIR MANUAL
667TA ENGINE OVERHAUL
Issued 11-2006
Book/Form Number 87519804 NA
Copyright © 2006. CNH America LLC. All Rights Reserved.
Printed in U.S.A. • Bur
Source Code No. unknown
667TA
TIER III

CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
2-II Issued 11-06 Bur 87519804 NA
CNH America LLC reserves the right to make improvements in design or changes in specifications at any time without incurring any
obligation to install them on units previously sold.
All data given in this publication is subject to production variations. Dimensions and weights are only approximate. Illustrations do
not necessarily show products in standard condition. For exact information about any particular product, please consult your Dealer
Revision History
Issue Issue Date Applicable Machines Remarks
First Edition 11-2006 667TA/EEG 667TA/EEC 667TA/EBF
667TA/EED 667TA/EBJ 667TA/EDJ 87519804 NA

2-1
87519804 NA Issued 11-06 Bur
CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
CHAPTER 2
667TA ENGINE OVERHAUL
TABLE OF CONTENTS
ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
CODING OF SOURCE ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
ENGINE PROPERTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
GENERAL ENGINE FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
CRANK GEAR COMPONENTS AND CYLINDER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
VALVE GEAR - CYLINDER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
TORQUE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
667TA ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
DESCRIPTION OF MAIN ENGINE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Engine Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Crankshaft Oil Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Connecting Rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Pistons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
EGR EXHAUST GAS RECIRCULATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Valve Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Cylinder Head Engines: 667TA/EBF - 667TA/EBD - 667TA/EED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Cylinder Head Engines: 667TA/EEG - 667TA/EEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Cylinder Head Engine: 667TA/EDJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Valves and Valve Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Valve Bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Engine Head Machining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Engine Flywheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Accessory Equipment Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
ENGINE LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Oil Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Oil Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
By-pass Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32
Oil Pan (Sump) Engines: 667TA/EEG-
667TA/EEC- 667TA/EBF- 667TA/EED- 667TA/EDJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32
Oil Pan (Sump) Engines: 667TA/EED-
667TA/EBD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Engine Oil Vapor Recirculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
Blow-by Recirculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
ENGINE COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
HIGH PRESSURE ELECTRONIC INJECTION SYSTEM (COMMON RAIL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
EDC7UC31 -ELECTRONIC CONTROL UNIT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Engine Preheating Element Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Phase Recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Injection Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Injection Pressure Closed Loop Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Pilot and Main Injection Advance Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
87519804 NA

2-2 Issued 11-06 Bur 87519804 NA
CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
Idle Speed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
Overheating Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
Maximum Engine Speed Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
Cut Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
Smoke Control Under Acceleration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
After Engine Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
Control Of Working Speed In Normal Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
Recover Strategies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-39
FUEL SUPPLY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
Fuel Supply System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-41
Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-42
Mechanical Supply Pump- Normal Operating Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-43
Mechanical Supply Pump- Outlet Overpressure Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-43
Fuel System Bleeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-44
High Pressure Pump Type CP3.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-45
High Pressure Pump Inside Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-47
Operating Principal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-48
Theory Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-49
COMMON RAIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
COMMON RAIL PRESSURE RELIEF VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
ELECTRO-INJECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52
Injection End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-52
Electro-injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-53
Pressure Limiter For Fuel Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-54
LOCATION OF THE MAIN ELECTRICAL COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
EDC7UC31 Electronic Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-56
Cabling Connector Pinout On Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-57
Connector (A) Injectors Pinout Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-58
Connector (C) Sensors Pinout Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-58
Crankshaft Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-59
Camshaft Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-59
Boost Temperature - Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-60
Engine Oil Temperature - Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-60
Common Rail Fuel Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-61
Electro-injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-62
Intake Air Pre-Post Resistance Heater and Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-63
Coolant Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-64
Fuel Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-65
High Pressure Pump - Pressure Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-66
CHECKING THE FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Low Pressure Supply Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-67
Low -pressure Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-68
Test On the Pressure Relief Valve On the Common Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-69
Test On Fuel Backflow From the Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-70
ENGINE OVERHAUL ON THE BENCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72
Disassembling the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-72
CHECKS AND SPECIFICATIONS ON ENGINE CRANKCASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82
Checks and Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-82
Checking the Eccentric Lift and Bearing Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-83
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-83
Checking the Crankcase Cylinder Head Mating Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-84
Camshaft Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-85
Replacing the Cam Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-85
Tappets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-85