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PERIODIC MAINTENANCE

52 YM Series Operation Manual

Tightening Fasteners

Use the correct amount of torque when you tighten fasteners on the engine. Applying

excessive torque may damage the fastener or component and not enough torque may

cause a leak or component failure.

NOTICE

he tightening torque in the Standard Torque Chart should be applied only to the

bolts with a “7” head (JIS strength classification: 7T). Apply 60% torque to bolts

that are not listed. Apply 80% torque when tightened to aluminum alloy.

Bolt Diameter x

Pitch (mm)

M6x1.0 M8x1.25 M10x1.5 M12x1.75 M14x1.5 M16x1.5

Tightening

Torque

N·m 11.0 ± 1.0 26.0 ± 3.0 50.0 ± 5.0 90.0 ± 10.0 140.0 ± 10.0 230.0 ± 10.0

ft-lb 8.0 ± 0.7 19.0 ± 2.1 37.0 ± 3.6 66.0 ± 7.2 103 ± 7.2 170 ± 7.2

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Yanmar 3GM30 Spezifikationen Seite 58