Doosan D20S-5 Operation & Maintenance Manual page 175

Torques for Taperlock Studs
Thread Size Standard Taperlock Stud Torque
Inch
N•m
1/4 8 ± 3
5/16 17 ± 5
3/8 35 ± 5
7/16 45 ± 10
1/2 65 ± 10
5/8 110 ± 20
3/4 170 ± 30
7/8 260 ± 40
1 400 ± 60
1/8 500 ± 700
1/4 650 ± 80
3/8 750 ± 90
1/2 870 ± 100
1
1 Newton meter (N•m) is approximately the same as 0.1 kg•m.
1
lb•ft
6 ± 2
13 ± 4
26 ± 4
33 ± 7
48 ± 7
80 ± 15
125 ± 22
190 ± 30
300 ± 45
370 ± 50
480 ± 60
550 ± 65
640 ± 75
Torque for Metric Fasteners
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
be saved 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.). This
chart gives standard torques for bolts and nuts with
Grade 8.8.
NOTE: Metric hardware must be replaced with
metric hardware. Check parts book.
Thread Size
Metric
M6
M8
M10
M12
M14
M16
M20
M24
M30
M36
1
1 Newton meter (1 N•m) is approximately the same as 0.1
kg•m.
2
ISO - International Standards organization.
-173-
Maintenance Section
NOTICE
Standard Torque
1
N•m lb•ft
12 ± 4 9 ± 3
25 ± 7 18 ± 5
55 ± 10 41 ± 7
95 ± 15 70 ± 11
150 ± 20 110 ± 15
220 ± 30 160 ± 22
450 ± 70 330 ± 50
775 ± 100 570 ± 75
1600 ± 200 1180 ± 150
2700 ± 400 2000 ± 300