Doosan G643E - Page 13

G643(E) Service Manual Chapter 1. General Information 11
General tightening torque
for bolts, nuts and taperlock studs
thread
size
Standard torque
The following charts give the standard toque
values for bolts, nuts and taperlock studs of
SAE Grade 5 or better quality. Exceptions are
given in other sections of the Service Manual
where needed.
inches Ib•ft. N•m*
Use these torques for
bolts and nuts with
standard threads (con-
versions are
approximate).
standaed thread
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
9 ± 3
18 ± 5
32 ± 5
50 ± 10
75 ± 20
110 ± 15
150 ± 20
265 ± 35
420 ± 60
640 ± 80
800 ± 100
1000 ± 120
1200 ± 150
1500 ± 200
12 ± 4
25 ± 7
45 ± 7
70 ± 15
100 ± 15
150 ± 20
200 ± 25
360 ± 50
570 ± 80
875 ± 100
1100 ± 150
1350 ± 175
1600 ± 200
2000 ± 275
Use these torques for
bolts and nuts on
hydraulic valve bodies.
5/16
3/8
7/16
1/2
5/8
13 ± 2
24 ± 2
39 ± 2
60 ± 3
118 ± 4
20 ± 3
35 ± 3
50 ± 3
80 ± 4
160 ± 6
Use these torques for
studs with taperlock
threads.
taperlock stud
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
5 ± 2
10 ± 3
20 ± 3
30 ± 5
40 ± 5
60 ± 10
75 ± 10
110 ± 15
170 ± 20
260 ± 30
320 ± 30
400 ± 40
480 ± 40
550 ± 50
7 ± 3
15 ± 5
30± 5
40 ± 10
55 ± 10
80 ± 15
100 ± 15
150 ± 20
230 ± 30
350 ± 40
400 ± 40
550 ± 50
650 ± 50
750 ± 70
B80625X1