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Tightening Fasteners

Use the correct amount of torque when you tighten fasteners. Applying excessive torque may

damage the fastener or component and not enough torque may cause a leak or component

failure.

NOTICE: The 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)

M6 x 1.0 M8 x 1.25 M10 x 1.5 M12 x 1.75 M14 x 1.5 M16 x 1.5

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

kgf-m 1.1 ± 0.1 2.7 ± 0.3 5.1 ± 0.5 9.2 ± 1.0 14.3 ± 1.0 23.5 ± 1.0

lb-ft – 19.0 ± 2.1 37 ± 3.6 66.0 ± 7.2 103 ± 7.2 170 ± 7.2

lb-in. 96 ± 9.0 – – – – –

PERIODIC MAINTENANCE

6LPA Series Operation Manual 51

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Yanmar BY series Spezifikationen Seite 57