Iveco Stralis AT/AD. Manual

1. Fuel valve - 2. Pumping element - 3. Fuel outlet -

4. Filling and backflow passage

0 411 700 002

XXXXXX XXXX X

868 USA /

60669

Figure 218

For each injector replaced, hook up to the MODUS station
and, when asked by the program, enter the code punched on
the injector (

→) to reprogram the control unit.

Injector Phases

When checking the clearance of the rocker arms, it
is important to check the injector-pump pre-load.

Filling phase

During the filling phase the pumping element (2) runs up to
the top position.
After passing the highest point of the cam, the rocker arm
roller comes near the base ring of the cam.
The fuel valve (1) is open and fuel can flow into the injector
via the bottom passage (4) of the cylinder head.
Filling continues until the pumping element reaches its top
limit.

Figure 219

110

ENGINE F2B

TRALIS

AT/AD

Base - January 2003

Injection phase

The injection phase begins when, at a certain point in the
down phase of the pumping element, the solenoid valve gets
energized and the fuel valve (1) shuts.

The moment delivery begins, appropriately calculated by the
electronic control unit, depends on the working conditions
of the engine.

The cam continues with the rocker arm to push the pumping
element (2) and the injection phase continues as long as the
fuel valve (1) stays shut.

1. Fuel valve - 2. Pumping element - 3. Fuel outlet -

4. Filling and backflow passage

1. Fuel valve - 2. Pumping element - 3. Fuel outlet -

4. Filling and backflow passage

60670

Figure 220

60671

Figure 221

Pressure Reduction phase

Injection ceases when the fuel valve (1) opens, at a certain
point in the down stroke of the pumping element, after the
solenoid valve gets de-energized.

The fuel flows back through the open valve (1), the injector
holes and the passage (4) into the cylinder head.

The time for which the solenoid valve stays energized, ap-
propriately calculated by the electronic control unit, is the
duration of injection (delivery) and it depends on the working
conditions of the engine.

ENGINE F2B

111

TRALIS

AT/AD

112

ENGINE F2B

TRALIS

AT/AD

Base - January 2003

113

TRALIS

AT/AD

F3A ENGINE

Page

VIEWS OF THE ENGINE

115

. . . . . . . . . . . . . . . . . .

TECHNICAL DESIGNATION

119

. . . . . . . . . . . . . . .

CHARACTERISTIC CURVES

120

. . . . . . . . . . . . . . .

GENERAL CHARACTERISTICS

122

. . . . . . . . . . . . .

ASSEMBLY CLEARANCE DATA

125

. . . . . . . . . . . .

TIGHTENING TORQUE

131

. . . . . . . . . . . . . . . . . .

TOOLS

137

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DISMANTLING THE ENGINE ON THE BENCH

149

REPAIR OPERATIONS

156

. . . . . . . . . . . . . . . . . . . .

CYLINDER BLOCK

156

. . . . . . . . . . . . . . . . . . . . . . .

Checks and measurements

156

. . . . . . . . . . . . . . .

CYLINDER LINERS

157

. . . . . . . . . . . . . . . . . . . . . . .

Replacing cylinder liners

158

. . . . . . . . . . . . . . . . . .

CRANKSHAFT

159

. . . . . . . . . . . . . . . . . . . . . . . . . .

Measuring the main journals and crankpins

160

. . .

Preliminary measurement of main and big end
bearing shell selection data

161

. . . . . . . . . . . . . . .

Selecting the main and big end bearing shells

162

. .

Replacing the timing gear
and oil pump

168

. . . . . . . . . . . . . . . . . . . . . . . . . .

Checking main journal assembly clearance

168

. . . .

Checking crankshaft end float

169

. . . . . . . . . . . . .

PISTON CONNECTING ROD ASSEMBLY

170

. . . .

Piston rings

172

. . . . . . . . . . . . . . . . . . . . . . . . . . .

CONNECTING RODS

173

. . . . . . . . . . . . . . . . . . . .

Bushings

174

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking connecting rods

174

. . . . . . . . . . . . . . . .

Mounting the connecting rod — piston assembly

175

Content .. 29 30 31 32 ..

Iveco Stralis AT/AD. Manual - part 31