Maintenance
Safety, Operation and Maintenance Manual - Aug 2012
5-22
SY115C9/135C/155H Crawler Hydraulic Excavator
Table 5-4
5.5 Tightening Torque Speci
fi
cation
Unless specified otherwise, the metric nuts
and bolts shall be tightened to the values giv-
en in the following table.
The tightening of torque is determined by the
width of screw cap or nut.
In replacement of the bolts or nuts, use Sany
genuine parts of equivalent size.
●
The nuts, bolts or other parts having not been tightened to speci
fi
c torque values can
lead to loose or damaged parts, hence resulting in machine failure and operating trou-
bles.
●
Special attention shall be paid when tightening any parts.
CZ335-1104001
NOTICE
Fig. 5-1
Thread
Diameter
a
(mm)
Square
Size
b
(mm)
Tightening Torques
Target Values
Torque Limits
N·m
kgf·m
lbft
N·m
kgf·m
lbft
6
10
13.2
1.35
9.8
11.8 - 14.7
1.2 - 1.5
8.7 - 10.8
8
13
31
3.2
23.1
27 - 34
2.8 - 3.5
20.3 - 25.3
10
17
66
6.7
48.5
59 - 74
6.0 - 7.5
43.4 - 54.2
12
19
113
11.5
83.2
98 - 123
10.0 - 12.5
72.3 - 90.4
14
22
177
18
130.2
157 - 196
16.0 - 20.0
115.7 - 144.7
16
24
279
28.5
206.1
245 - 309
25.0 - 31.5
180.8 - 227.8
18
27
382
39
282.1
343 - 425
35.0 - 43.5
253.2 - 314.6
20
30
549
56
405
490 - 608
50.0 - 62.0
361.7 - 448.4
22
32
745
76
549.7
662 - 829
67.5 - 84.5
488.2 - 611.2
24
36
927
94.5
683.5
824 - 1030
84.0 - 105.0
607.6 - 759.5
27
41
1320
135
976.5
1180 - 1470
120.0 - 150.0
868.0 - 1085.0
30
46
1720
175
1265.8
1520 - 1910
155.0 - 195.0
1121.1 - 1410.4
33
50
2210
225
1627.4
1960 - 2450
200.0 - 250.0
1446.6 - 1808.3
36
55
2750
280
2025.2
2450 - 3040
250.0 - 310.0
1808.3 - 2242.2
39
60
3280
335
2423.1
2890 - 3630
295.0 - 370.0
2133.7 - 2676.2