Nanni 4.195HE, Workshop Manual

Page: 21 / 125

S-4
03-M Series, WSM
DIESEL ENGINE
[3] TIGHTENING TORQUES
Screws, bolts and nuts must be tightened to the specified torque using a torque wrench, several screws, bolts and
nuts such as those used on the cylinder head must be tightened in proper sequence and the proper torque.
(1) Tightening Torques for Special Use Screws, Bolts and Nuts
NOTE
Q
• For “*” marked screws, bolts and nuts on the table, apply engine oil to their threads and seats before
tightening.
• The letter “M” in Size x Pitch means that the screw, bolt or nut dimension stands for metric. The size is
the nominal outside diameter in mm of the threads. The pitch is the nominal distance in mm between two
threads.
W1013236
(2) Tightening Torques for General Use Screws, Bolts and Nuts
W10371750
Screw and bolt material grades are shown by numbers punched on the screw and bolt heads. Prior to
tightening, be sure to check out the numbers as shown below.
W1012705
Item Size x Pitch N·m kgf·m ft-lbs
Cylinder head cover screw
* Cylinder head screw
* Main bearing case screw 1
* Main bearing case screw 2
* Flywheel screw
* Connecting rod screw
* Rocker arm bracket screw
* Idle gear shaft screw
Fan drive pulley mounting nut
* Bearing case cover screw
Glow plug
Nozzle holder assembly
Oil Switch taper screw
Injection pipe retaining nut
Overflow pipe assembly retaining nut
Camshaft set screw
Hi-idling body
Balancer shaft set bolt
M6
×
1.0
M11
×
1.25
M9
×
1.25
M10
×
1.25
M12
×
1.25
M8
×
1.0
M8
×
1.25
M8
×
1.25
M30
×
1.5
M8
×
1.25
M10
×
1.25
M20
×
1.5
PT 1/8
M12
×
1.5
–
M8
×
1.25
M14
×
1.0
M8
×
1.25
6.9 to 11.3
93.2 to 98.1
46.1 to 51.0
68.6 to 73.5
98.1 to 107.9
44.1 to 49.0
23.5 to 27.5
23.5 to 27.5
137.3 to 156.9
23.5 to 27.5
19.6 to 24.5
49.0 to 68.6
14.7 to 19.6
24.5 to 34.3
19.6 to 24.5
23.5 to 27.5
44.1 to 49.0
23.5 to 27.5
0.7 to 1.15
9.5 to 10.0
4.7 to 5.2
7.0 to 7.5
10.0 to 11.0
4.5 to 5.0
2.4 to 2.8
2.4 to 2.8
14.0 to 16.0
2.4 to 2.8
2.0 to 2.5
5.0 to 7.0
1.5 to 2.0
2.5 to 3.5
2.0 to 2.5
2.4 to 2.8
4.5 to 5.0
2.4 to 2.8
5.1 to 8.32
68.7 to 72.3
34.0 to 37.6
50.6 to 54.2
72.3 to 79.6
32.5 to 36.2
17.4 to 20.3
17.4 to 20.3
101.3 to 115.7
17.4 to 20.3
14.5 to 18.1
36.2 to 50.6
10.8 to 14.5
18.1 to 25.3
14.5 to 18.1
17.4 to 20.3
32.6 to 36.3
17.4 to 20.3
Grade
Nominal Unit
Diameter
Standard Screw and Bolt Special Screw and Bolt
N·m kgf·m ft-lbs N·m kgf·m ft-lbs
M6 7.9 to 9.3 0.80 to 0.95 5.8 to 6.9 9.8 to 11.3 1.00 to 1.15 7.23 to 8.32
M8 17.7 to 20.6 1.8 to 2.1 13.0 to 15.2 23.5 to 27.5 2.4 to 2.8 17.4 to 20.3
M10 39.2 to 45.1 4.0 to 4.6 28.9 to 33.3 48.1 to 55.9 4.9 to 5.7 35.4 to 41.2
M12 62.8 to 72.6 6.4 to 7.4 46.3 to 53.5 77.5 to 90.2 7.9 to 9.2 57.1 to 66.5
Punched number Screw and bolt material grade
None or 4 Standard screw and bolt SS400, S20C
7 Special screw and bolt S43C, S48C (Refined)
KiSC issued 08, 2012 A