维修详情
Systems Operation
Testing and Adjusting
1206F-E70TA and 1206F-E70TTA
Table of Contents
Engine Oil Pressure - Test............... ............... 96
Engine Oil Pump - Inspect............... ............... 96
Excessive Bearing Wear - Inspect......... ......... 97
Excessive Engine Oil Consumption - Inspect. 97
Increased Engine Oil Temperature - Inspect . . 97
Systems Operation Section
General Information
Introduction............................ ........................... 4
Cooling System
Cooling System - Check................. ................ 98
Cooling System - Inspect................ ................ 98
Cooling System - Test................... .................. 99
Engine Oil Cooler - Inspect.............. ............. 100
Water Temperature Regulator - Test....... ...... 101
Water Pump - Inspect.................. ................. 101
Engine Operation
Basic Engine........................... .......................... 8
Air Inlet and Exhaust System (Single
Turbocharger)........................ ........................11
Air Inlet and Exhaust System (Series
Turbochargers)....................... ...................... 18
Clean Emissions Module................ ................ 24
DEF Dosing Control System.............. ............. 27
Cooling System ....................... ....................... 33
Lubrication System..................... .................... 36
Electrical System...................... ...................... 37
Cleanliness of Fuel System Components.... ... 38
Fuel Injection ......................... ......................... 40
Electronic Control System............... ............... 49
Power Sources........................ ....................... 64
Glossary of Electronic Control Terms ....... ...... 69
Basic Engine
Position the Valve Mechanism Before
Maintenance Procedures.............. .............. 102
Piston Ring Groove - Inspect............ ............ 103
Connecting Rod - Inspect............... .............. 103
Cylinder Block - Inspect................ ................ 104
Cylinder Head - Inspect................ ................ 104
Piston Height - Inspect................. ................. 105
Flywheel - Inspect..................... .................... 106
Flywheel Housing - Inspect ............. ............. 106
Gear Group - Inspect.................. .................. 108
Vibration Damper - Check .............. .............. 108
Testing and Adjusting Section
Fuel System
Electrical System
Fuel System - Inspect................... .................. 74
Air in Fuel - Test....................... ....................... 74
Finding Top Center Position for No. 1 Piston. . 76
Fuel Injection Timing - Check ............. ............ 77
Fuel Quality - Test...................... ..................... 78
Fuel System - Prime.................... ................... 78
Gear Group (Front) - Time............... ............... 79
Alternator - Test ...................... .......................110
Battery - Test......................... .........................112
Charging System - Test ................ .................112
V-Belt - Test ......................... ..........................113
Electric Starting System - Test........... ............114
Index Section
Air Inlet and Exhaust System
Index............................... ...............................119
Air Inlet and Exhaust System - Inspect...... ..... 80
Turbocharger - Inspect (Single Turbocharger) 81
Turbocharger - Inspect (Series
Turbochargers)....................... ...................... 84
Exhaust Cooler (NRS) - Test ............. ............. 86
Compression - Test..................... .................... 87
Engine Valve Lash - Inspect.............. ............. 88
Valve Depth - Inspect................... ................... 90
Valve Guide - Inspect................... ................... 90
Diesel Exhaust Fluid Quality - Test......... ........ 91
Aftertreatment SCR System Dosing Test .... ... 92
Diesel Exhaust Fluid Tank - Flush ......... ......... 93
Lubrication System
This document is printed from SPI2. Not for RESALE
The 1206F-E70TA and 1206F-E70TTA diesel
engines are electronically controlled. The 1206F-
E70TA and 1206F-E70TTA engines have an
Electronic Control Module (ECM) that receives
signals from the fuel injection pump and other
sensors in order to control the electronic unit injector.
The fuel injection pump supplies fuel to the high-
pressure manifold (Rail). The high-pressure manifold
(rail) distributes fuel to the electronic unit injectors.
The pistons have two compression rings and an oil
control ring. The groove for the top ring has a hard
metal insert in order to reduce wear of the groove.
The skirt has a layer of graphite in order to reduce the
risk of seizure when the engine is new. The correct
piston height is important in order to ensure that the
piston does not contact the cylinder head. The correct
piston height also ensures the efficient combustion of
fuel which is necessary in order to conform to
requirements for emissions.
The six cylinders are arranged in-line. The cylinder
head assembly has two inlet valves and two exhaust
valves for each cylinder. The ports for the exhaust
valves are on the right side of the cylinder head. The
ports for the inlet valves are on the left side of the
cylinder head. Each valve has a single valve spring.
The crankshaft has seven main bearing journals. End
play is controlled by thrust washers which are located
on both sides of the number 6 main bearing.
The timing case is made of aluminum or cast iron.
The timing gears are stamped with timing marks in
order to ensure the correct assembly of the gears.
When the number 1 piston is at the top center
position of the compression stroke, the marked teeth
on the idler gear will align with the marks that are on
the fuel injection pump gear, the camshaft gear, and
the gear on the crankshaft. There are no timing marks
on the rear face of the timing case.
The crankshaft gear turns the idler gear which then
turns the following gears:
• the camshaft gear
• the accessory drive gear (if equipped)
• the fuel injection pump gear
• the water pump gear
The camshaft runs at half the rpm of the crankshaft.
The fuel injection pump runs at the same rpm as the
crankshaft.
The fuel injection pump that is installed on the left
side of the engine is gear-driven from the timing case.
The fuel is transferred to the fuel injection pump by an
electric transfer pump. The electric transfer pump
draws fuel across a suction strainer that supplies fuel
to the primary fuel filter and the secondary fuel filter.
The fuel then travels to the fuel injection pump. A
pressure regulator that is installed in the low-pressure
fuel system controls the fuel pressure to the fuel
injection pump. The pressure regulator regulates the
fuel at an absolute pressure of 150 kPa (22 psi)
when the engine is at idle speed.
The fuel injection pump increases the fuel to a
maximum pressure of 200 MPa (29000 psi). The fuel
injection pump delivers the fuel to the high-pressure
manifold (Rail). The suction control valve and the fuel
temperature sensor on the fuel injection pump are
serviceable. The engine uses speed sensors and the
Electronic Control Module to control the engine
speed.
For the specifications of the 1206F-E70TA and
1206F-E70TTA engines, refer to the Specifications,
“Engine Design”.
This document is printed from SPI2. Not for RESALE
Engine Operation
The cylinders are honed to a specially controlled
finish in order to ensure long life and low oil
consumption.
The cylinder block has seven main bearings which
support the crankshaft. Thrust washers are installed
on both sides of number 6 main bearing in order to
control the end play of the crankshaft. The thrust
washers can only be installed one way.
i05221672
Basic Engine
Passages supply the lubrication for the crankshaft
bearings. These passages are machined into the
cylinder block.
Introduction
The eight major mechanical components of the basic
engine are the following parts:
Cooling passages are cast into the cylinder block in
order to allow the circulation of coolant.
The cylinder block has a bush that is installed for the
front camshaft journal. The other camshaft journals
run directly in the cylinder block.
• Cylinder block
• Cylinder head
• Pistons
The engine has a cooling jet that is installed in the
cylinder block for each cylinder. The piston cooling jet
sprays lubricating oil onto the inner surface of the
piston in order to cool the piston.
• Connecting rods
• Crankshaft
A Multi-Layered Steel (MLS) cylinder head gasket is
used between the engine block and the cylinder head
in order to seal combustion gases, water, and oil.
• Vibration damper
• Timing gear case and gears
• Camshaft
Cylinder Head
Cylinder Block
Illustration 4
g01907673
Typical example
The cast iron cylinder block for the 1206F-E70TA and
1206F-E70TTA engines has six cylinders which are
arranged in-line. The cylinder block is made of cast
iron. The cylinder block provides support for the full
length of the cylinder bores. The cylinder bores are
machined into the block.
Illustration 5
g02212800
Typical example
(1) Valve keepers
(2) Valve spring retainer
(3) Valve spring
This document is printed from SPI2. Not for RESALE
珀金斯Perkins1206F-E70TA(TTA)测试调整维修保养
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