Yanmar 3JH4BE - 14 Tightening Torque for Bolts and Nuts; Main Bolt and Nut; Standard Bolts and Nuts (Without Lube Oil)

14. TIGHTENING TORQUE FOR BOLTS AND NUTS
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14. TIGHTENING TORQUE FOR BOLTS AND NUTS
14.1 Main Bolt and Nut
14.2 Standard Bolts and Nuts (without lube oil)
No Name
Thread diameter
x pitch (mm)
Lubricating oil application
(thread portion, and seat
surface)
Torq u e
N•m(kgf-m)
1 Head bolt M10 x 1.25 Coat with lube oil 85.2-91.2 (8.69-9.30 )
2 Rod bolt M9 x 1.0 Coat with lube oil 44.1-49.1 (4.50-5.01)
3 Flywheel retainer bolt M10 x 1.25 Coat with lube oil 83.3-88.3 (8.49-9.00)
4 Metal cap retainer bolt M12 x 1.5 Coat with lube oil 96-100 (9.79-10.2)
5
Crankshaft pulley bolt
(FC300 pulley)
M14 x 1.5 Coat with lube oil 83.2-93.2 (8.48-9.50)
6 Fuel pump gear nut M14 x 1.5 Coat with lube oil 78-88 (8-9)
7 Nozzle fastening bolt M8 x 1.25 No lube oil 24.4-28.4 (2.49-2.90)
8
Fuel injection pipe
joint nut
M12 x 1.5 No lube oil 29.4-34.4 (3.00-3.51)
9
Starter relay terminal
nut
M6 x 1 No lube oil 3.0-4.2 (0.31-0.43)
N•m (kgf-m)
Name Screw dia. x pitch (mm) Tightening torque Remarks
Hexagon bolt t (7T)
and nut
M6 x 1 9.8-11.8 (1.0-1.2) Use 80% of the value at
left when the tightening
part is aluminum.
Use 60% of the value at
left for 4T bolts and lock
nuts.
M8 x 1.25 22.5-28.5 (2.3-2.9)
M10 x 1.5 44-54 (4.5-5.5)
M12 x 1.75 78.2-98.2 (8.0-10.0)
PT plug 1/8 9.8 (1.0)
1/4 19.6 (2.0)
3/8 29.4 (3.0)
1/2 58.8 (6.0)
Pipe joint bolt M8 12.7-16.7 (1.3-1.7)
M10 19.5-25.5 (2.0-2.6)
M12 24.4-34.4 (2.5-3.5)
M14 39.1-49.1 (4.0-5.0)
M16 48.9-58.9 (5.0-6.0)