MAINTENANCE
7-113
Check Tightening Torque of Bolts and Nuts
--- every 250 hours (first time after 50 hours)
Check tightness after the first 50 hours then every 250
hours. Tighten to torque shown if any are loose. Bolts and
nuts should be replaced with those of the same or higher
grade.
IMPORTANT: Check and tighten bolts and nuts using a
torque wrench.
Torque Specifications
Torque
No.
Descriptions
Bolt Dia
(mm)
Q’ty
Wrench
Size (mm)
N
x
m
(kgf
x
m
)
(lbf
x
ft
)
1
Engine cushion rubber mounting bolt
36
6
55
3140
(320)
(2320)
Engine bracket mounting bolt
(Flywheel housing side)
27
12
41
1030
(105)
(760)
2
Engine bracket mounting bolt (Fan side)
20
10
30
390
(40)
(290)
3
Hydraulic oil tank mounting bolt
30
8
46
1420
(145)
(1050)
4
Fuel tank mounting bolt
30
15
46
1420
(145)
(1050)
5
Pump transmission mounting bolt
12
16
19
88
(9)
(65)
Pump mounting bolt (Main pump)
20
12
30
540
(55)
(400)
6
Pump mounting bolt (Fan pump)
20
4
17
540
(55)
(400)
7
Gear pump mounting bolt
12
4
19
88
(9)
(65)
8
Control valve mounting bolt
16
12
24
265
(27)
(195)
9
Swing device mounting bolt
33
48
50
2550
(260)
(1880)
10
Swing motor mounting bolt
20
8
30
390
(40)
(290)
11
Battery mounting bolt
10
16
17
49
(5)
(36)
12
Cab mounting bolt
18
10
27
295
(30)
(220)
13
Cab bed mounting bolt
16
40
24
265
(27)
(195)
Swing bearing mounting bolt
(Upperstructure)
45
58
70
4700
(480)
(3470)
14
Swing bearing mounting bolt (Track)
45
60
70
4700
(480)
(3470)
15
Counterweight mounting bolt
45
6
75
3920
(400)
(2890)
16
Engine bed mounting bolt
30
20
30
1420
(145)
(1050)
17
Oil cooler mounting bolt
27
4
41
1370
(140)
(1010)
18
Radiator mounting bolt
27
4
41
1370
(140)
(1010)
19
Fan motor mounting bolt
16
4
24
205
(21)
(152)
20
Fan motor bracket mounting bolt
12
6
19
88
(9)
(65)
21
Travel motor mounting bolt
20
8
30
390
(40)
(290)
22
Upper roller mounting bolt
20
25
30
390
(40)
(290)
23
Lower roller mounting bolt
30
64
46
1910
(195)
(1410)
Travel device mounting bolt (A)
22
32
32
740
(75)
(540)
Travel device mounting bolt (B)
33
64
50
2550
(260)
(1880)
24
Travel device mounting bolt (C)
30
60
46
1910
(195)
(1410)
25
Sproket mounting bolt
30
30
46
1910
(195)
(1410)
26
Track guard mounting bolt
30
12
46
1910
(195)
(1410)
27
Track shoe bolt
33
392
50
3190
(325)
(2350)
28
Side frame mounting bolt
45
68
70
4710
(480)
(3470)
Front pin-retaining bolt (Loader)
20
32
30
390
(40)
(290)
Front pin-retaining bolt (Loader)
16
4
24
205
(21)
(152)
29
Front pin-retaining bolt (Loader)
24
4
36
690
(70)
(510)
Front pin-retaining bolt (Backhoe)
20
24
30
390
(40)
(290)
30
Front pin-retaining bolt (Backhoe)
16
12
24
205
(21)
(152)
Summary of Contents for EX1900-5
Page 1: ......
Page 37: ...SAFETY SIGNS S 29 SS 411 SS 691 SS 442 M18C 01 006 SS 445 M144 07 107 ...
Page 38: ...SAFETY SIGNS S 30 SS 446 SS 723 SS3076117 SS 723 SS 410 SS 723 Loading Shovel ...
Page 39: ...SAFETY SIGNS S 31 SS3091476 M146 01 035 ...
Page 40: ...SAFETY SIGNS S 32 SS 413 M18C 01 007 M18C 01 008 ...
Page 42: ...SAFETY SIGNS S 34 MEMO ...
Page 112: ...DRIVING THE MACHINE 4 12 MEMO ...
Page 140: ...MAINTENANCE 7 8 MEMO ...
Page 146: ...MAINTENANCE 7 14 Hoses Q ty in Use Transmission Oil Cooler Hose 5 2 M18C 07 062 5 ...
Page 156: ...MAINTENANCE 7 24 4 Grouped Grease Fittings 7 Arm Ñ Lubrication M144 07 079 M144 07 005 7 ...
Page 258: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 2 MEMO ...
Page 274: ...TROUBLESHOOTING 11 14 MEMO ...
Page 278: ...SPECIFICATIONS 12 4 MEMO ...