Maintenance Section
188
Torques for Taper lock Studs
Thread Size
Inch
Standard Taper lock Stud Torque
N·m
1
lb·ft
1/4 8 ± 3 6 ± 2
5/16 17 ± 5 13 ± 4
3/8 35 ± 5 26 ± 4
7/16 45 ± 10 33 ± 7
1/2 65 ± 10 48 ± 7
5/8 110 ± 20 80 ± 15
3/4 170 ± 30 125 ± 22
7/8 260 ± 40 190 ± 30
1 400 ± 60 300 ± 45
1/8 500 ± 700 370 ± 50
1/4 650 ± 80 480 ± 60
3/8 750 ± 90 550 ± 65
1/2 870 ± 100 640 ± 75
1
1 Newton meter (N·m) is approximately the same as 0.1
kg·m.
Torques for Metric Fasteners
NOTICE
Be very careful never to mix metric with U.S.
customary (standard) fasteners. Mismatched or
incorrect fasteners will cause lift truck damage or
malfunction and may even result in personal injury.
Original fasteners removed from the lift truck should
checked for any damages and kept for reassembly
whenever possible. If new fasteners are needed,
they must be of the same size and grade as the
ones that are being replaced.
The material strength identification is usually shown
on the bolt head by numbers (8.8, 10.9, etc.). The
following chart gives standard torques for bolts and
nuts with Grade 8.8.
For mounting torques of main parts, Please refer to
Service manual for detail.
NOTE: Metric hardware must be replaced with
metric hardware. Check parts book for
proper replacement.
Thread Size
Metric
Standard Torque
N·m
1
lb·ft
M6 12 ± 4 9 ± 3
M8 25 ± 7 18 ± 5
M10 55 ± 10 41 ± 7
M12 95 ± 15 70 ± 11
M14 150 ± 20 110 ± 15
M16 220 ± 30 160 ± 22
M20 450 ± 70 330 ± 50
M24 775 ± 100 570 ± 75
M30 1600 ± 200 1180 ± 150
M36 2700 ± 400 2000 ± 300
1
1 Newton meter (1 N·m) is approximately the same as
0.1 kg·m.
2
ISO - International Standards organization.
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