Yanmar BY series Dokumentacja Pobierz pdf (Strona 57)

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

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Yanmar BY series Dokumentacja Strona 57