Engines Iveco N45, N67. Manual — part 26
70182
70181
Figure 25
Figure 26
Grind journals and crankpins if seizing, scoring or excessive
ovalisation are found. Before grinding the pins (2) measure
them with a micrometer (1) to decide the final diameter to
which the pins are to be ground.
!
It is recommended to insert the found values in the
proper table.
See Figure 26.
Undersize classes are:
!
Journals and crankpins shall always be ground to the
same undersize class.
Journals and crankpins undersize shall be marked on
the side of the crank arm No.1.
For undersized crankpins: letter M
For undersized journals: letter B
For undersized crankpins and journals: letters MB.
FILL THIS TABLE WITH OUTPUT SHAFT JOURNAL AND CRANKPIN MEASURED VALUES (4 CYL.)
*Rated value
OUTPUT SHAFT
Measuring journals and crankpins
18
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F4HE NEF ENGINES
Base - February 2006
Print P2D32N00GB
70183
Figure 27
OUTPUT SHAFT MAIN TOLERANCES
70237
MAIN BEARING ON TIMING
SYSTEM CONTROL SIDE
INTERMEDIATE MAIN
BEARINGS
FIRST MAIN BEARING
ON FRONT SIDE
measured on > 45.5 mm radius
between adjacent journals
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
19
F4HE NEF ENGINES
Print P2D32N003GB
Base - February 2006
TOLERANCES
TOLERANCE CHARACTERISTIC
GRAPHIC SYMBOL
SHAPE
Roundness
○
SHAPE
Cilindricity
/
○/
Parallelism
//
DIRECTION
Verticality
Straightness
POSITION
Concentricity or coaxiality
Circular oscillation
OSCILLATION
Total oscillation
Taper
LEVELS OF IMPORTANCE FOR PRODUCT CHARACTERISTICS
GRAPHIC SYMBOL
CRITICAL
©
IMPORTANT
⊕
SECONDARY
⊝
Figure 28
FILL THIS TABLE WITH OUTPUT SHAFT JOURNAL AND CRANKPIN MEASURED VALUES
*Rated value
Figure 29
MAIN OUTPUT SHAFT TOLERANCES
*
Measured on a radius greater than 45.5 mm
**
↗ 0.500 between adjacent main journals
70577
Measuring journals and crankpins (6 cyl.)
107269
20
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F4HE NEF ENGINES
Base - February 2006
Print P2D32N00GB
70237
MAIN BEARING ON TIMING
SYSTEM CONTROL SIDE
INTERMEDIATE MAIN
BEARINGS
FIRST MAIN BEARING ON
FRONT SIDE
Figure 30
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
21
F4HE NEF ENGINES
Print P2D32N003GB
Base - February 2006
TOLERANCES
TOLERANCE CHARACTERISTIC
GRAPHIC SYMBOL
SHAPE
Roundness
○
SHAPE
Cilindricity
/
○/
Parallelism
//
DIRECTION
Verticality
Straightness
POSITION
Concentricity or coaxiality
Circular oscillation
OSCILLATION
Total oscillation
Taper
LEVELS OF IMPORTANCE FOR PRODUCT CHARACTERISTICS
GRAPHIC SYMBOL
CRITICAL
©
IMPORTANT
⊕
SECONDARY
⊝
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