Hitachi EX20UR-2 Manual page 12

GENERAL INFORMATION / Tightening
EX4OUR-2
No. Descriptions
Bolt Dia
mm
Qty
Wrench Size
mm
Torque
1
N•m : kgf•m : lbf•ft
I i
1 Engine cushion rubber mounting bolt 12 4 19
1
88 i 9 I 65
2
Engine bracket mounting bolt
Engine bracket mounting nut
10
10
7
1
17
17
49 5 36
49 5 36
3 Hydraulic oil tank mounting bolt 10 4 17 49
1
r 5
1
1 36
4 Hydraulic hoses and Union Joints
PF1/4"
P F3/8"
PF1/2"
PF3/4"
PF3/4"
PT1"
19
22
27
32
36
41
29.5 3 22
39 4 29
64 6.5 47
137 14 101
176.5 18 130
206 21 152
5 Pump mounting bolt
12
2 19
88 9 , 65
1
6 Pump cover mounting bolt
10 4 17 49 5
36
7
Control valve mounting bolt
Control valve bracket mounting bolt
10
10
4
7
17
17
49 5 I 36
49
5
I 36
8 Swing device mounting bolt 12 6 19
88 9 65
9 Swing motor mounting socket bolt 8 4 6 32
3.3 24
10 Battery mounting nut
6 4 10 4.9 0.5 3.6
11 Canopy mounting bolt
16
12
1
3
24
19
206 21 152
88 9 I 65
12 Cab mounting bolt 16 4 24 137
14 101
13
Swing bearing mounting bolt to upperstructure
Swing bearing mounting bolt to undercarriage
12
12
18
20
19
19
109 11 80
109 I 11 I 80
14 Travel device mounting bolt 12 18 19
109 I 11 I 80
15 Sprocket mounting socket bolt
12 18 19 109
11 I 80
16 Upper roller mounting bolt 14 2 22
137
14
101
17 Lower roller mounting bolt 14 16 22 176.5
18 130
18 Cover mounting bolt
10
12
17
19
49 5
36
88
I 9 I 65
19 Counterweight mounting bolt 22 3 32 735.5 I
75 543
NOTE:
(1) Apply lubricant (i.e. white zinc B dissolved into spindle oil) to bolts and nuts to stabilize their friction
coefficients.
(2) Make sure bolt and nut threads are clean before installing.
(3) Apply Loctite to threads of engine cushion rubber mounting bolts, lower roller mounting bolts, and
swing-post vertical-pin mounting bolts before installing them.
W01-02-03