Engine Iveco C10/C13/C78/Cursor 13/Cursor 78. Manual - part 22

6

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

F2B

Type

F2B

Type

mm

1

X

X1*

2.71 to 2.74

X

1

2

X

Piston ring grooves

X2

2.55 to 2.57

X

3

2

X

X3

4.02 to 4.04

3

X

*measured on

∅ of 112 mm

Piston rings:
trapezoidal seal

S1*

2.575 to 2.595
2 470 t 2 490

1
2

S
S

p

lune seal

S2

milled scraper rin

2.470 to 2.490

3

S

milled scraper ring
with slits and internal
spring

S3

3 975 to 3 990

spring

S3

*measured on

∅ of 112 mm

3.975 to 3.990

1

0.115 to 0.165

Piston rings -
grooves

2

0.060 to 0.100

3

0.030 to 0.065

Piston rings

_

X1

2

X

Piston ring end gap in
cylinder liners:

3

2

X

X

X1

0.35 to 0.50

3

X

X2

0.70 to 0.95

X3

0.30 to 0.60

1

∅

Small end bush housing

Ø1

49.975 to 50.000

1

∅

∅

2

Big end bearing
housing

Ø2

1

Selection classes Ø2

2

3

77.000 to 77.030

77.000 to 77.010
77.010 to 77.020
77.020 to 77.030

∅

4

Small end bush diameter

∅

3

outside

∅4

50.055 to 50.080

∅

3

inside

∅3

46.015 to 46.030

S

Big end bearing shell

S

Red
Green
YellowD

2.000 to 2.010
2.011 to 2.020
2.021 to 2.030

Small end bush - housing

0.055 to 0.105

Piston pin - bush

0.015 to 0.036

Big end bearing shells

0.127 - 0.254 - 0.508

Connecting rod weight

g.

A

2865 to 2895

Class

B

2896 to 2925

C

2926 to 2955

D

Fitted in production only and not supplied as spares

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

7

Type

F2B

Type

mm

X

Measuring dimension

X

125

Max. connecting rod
axis misalignment
tolerance

0.08

1

2

∅

∅

Main journals

∅1

- nominal
- class

1

- class

2

- class

3

Crankpins

∅2

- nominal
- class

1

- class

2

- class

3

82.910 to 82.940
82.910 to 82.919
82.920 to 82.929
82.930 to 82.940

72.915 to 72.945
72.915 to 72.924
72.925 to 72.934
72.935 to 72.945

S 1

S 2

Main bearing shells

S1

Red
Green
YellowD

3.000 to 3.010

3.011 to 3.020
3.021 to 3.030

Big end bearing shells

S2

Red
Green
YellowD

2.000 to 2.010

2.011 to 2.020
2.021 to 2.030

3

∅

Main bearing housings

∅3

- nominal
- class

1

- class

2

- class

3

89.000 to 89.030
89.000 to 89.009
89.010 to 89.019
89.020 to 89.030

Bearing shells -
main journals

f

0.040 to 0.098 * - 0.040 to 0.0110 **

Bearing shells -
big ends

f

0.035 to 0.093 * - 0.035 to 0.083 **

Main bearing shells

0.127 - 0.254 - 0.508

Big end bearing shells

0.127 - 0.254 - 0.508

X1

Main journal,
thrust bearing

X1

39.96 to 40.04

X2

Main bearing housing,
thrust bearing

X2

32.94 to 32.99

X 3

Thrust washer
halves

X3

3.38 to 3.43

Driving shaft shoulder

0.11 to 0.34

1

2

Alignment

1 - 2

Ovality

1 - 2

Taper

1 - 2

≤ 0.05

_0.010

0.010

D

Fitted in production only and not supplied as spares

f

Spares provided: : * = standard spares - 0.127; ** = 0.254 - 0.508

8

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

11

Type

F2B

CYLINDER HEADS - VALVE TRAIN

mm

∅

1

Valve guide housings
in cylinder head

∅1

12.980 to 12.997

2

∅

∅ 2

8.023 to 8.038

∅

3

∅ 2

Valve guide

∅ 3

13.012 to 13.025

Valve guides - housings
in the cylinder heads

0.015 to 0.045

Valve guide

_

∅

4

Valves:

∅

Valves:

∅ 4

7.970 to 8.985

∅ 4

α

60

° 30′ ± 7′ 30″

∅ 4

7.970 to 8.985

α

∅ 4

α

45

° + 15′

Valve stem and its guide

0.038 to 0.068

Housing in head for valve
seat

seat

∅1

41.985 to 42.020

∅

1

∅1

40.985 to 41.020

Outside diameter of valve

2

∅

Outside diameter of valve
seat; angle of valve seat in
cylinder head:

∅ 2

42.060 to 42.075

α

60

° - 30’

α

∅ 2

41.060 to 41.075

∅ 2

α

45

° - 30′

Recessing of
valve

0.5 to 0.8

X

valve
X

1.6 to 1.9

Between valve

Between valve
seat and head

0.040 to 0.090

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

9

Type

F2B

mm

Valve outside spring
height:

free height

H

63.6

H

H 1

2

under a load of:

H 1

H 2 N 454 ± 22

H1

49.5

N 840

± 42

H2

37.5

X

Injector protrusion

X

0.7

∅

∅

∅

Camshaft

bush

housing

fitted in the cylinder head:
1

⇒ 7

Ø

80.000 to 80.030

∅

∅

∅

1

2

3

Camshaft journal diameter:
1

⇒ 7

Ø

75.924 to 75.940

∅

Camshaft bushing outer
diameter:

∅

80.090 to 80.115

∅

Camshaft bushing
inner diameter:

∅

75.990 to 76.045

Bushings and housings in
engine block

0.060 to 0.115

Bushings and journals

0.050 to 0.121

Cam lift:

8.07

H

7.63

8.82

∅

1

Rocker shaft

∅ 1

37.984 to 38.000