Tightening Fasteners - Yanmar 3JH4E Operation Manual

PERIODIC MAINTENANCE

Tightening Fasteners

Use the correct amount of torque when you
tighten fasteners on the machine. Applying
excessive torque may damage the fastener
or component and not enough torque may
cause a leak or component failure.
Bolt diameter x pitch
(mm)
N·m
kgf-m
Tightening
Torque
lb-ft
lb-in.
54
M6 x 1.0 M8 x 1.25
11.0 ± 1.0 26.0 ± 3.0
1.1 ± 0.1 2.7 ± 0.3
— 19.0 ± 2.1
96 ± 9.0 —
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.
M10 x 1.5 M12 x 1.75
50.0 ± 5.0 90.0 ± 10.0
5.1 ± 0.5 9.2 ± 1.0
37 ± 3.6 66.0 ± 7.2
— —
JH4 Series Operation Manual
M14 x 1.5 M16 x 1.5
140.0 ± 10.0 230.0 ± 10.0
14.3 ± 1.0 23.5 ± 1.0
103 ± 7.2 170 ± 7.2
— —