IHI 55N3, Руководство по эксплуатации, Страница: 90 / 115

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MAINTENAN C E
500HOURS
3-7 500 HOURS MAINTENANCE AND CHECKS
First perform previous service hour items
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Check the Fixed Bolt Torque
When loosened bolt or nut is found at daily check,
tighten it with torque specifications table.
1. Special torque specifications
Special tighten is applied for main bolts as
illustrated below.
When replacing bolts, apply molybdenum grease
to bolts, nuts, and bearing surface of nuts.
Then, tighten them with specified torque.
2. General torque specifications
Other than above-mentioned, refer the next table
for torques.
Items Tighten point
Wrench size Thread size Tighten torque
(mm) metrie N • m
c
Travel drive 24 M16 245
d
Sprocket 22 M14 157
e
Lower roller 30 M20 490
f
Swing bearing 24 M16 245
g
Swing motor 24 M16 245
Newton meter (N • m) is approximately the same as 0.1 kg • m
Tighten torque
Metric Metric fine
coarse H.T. H.T. bolt
N • m N • m
M8 13 23 25
M10 17 47 50
M12 19 83 91
M14 22 134 135
M16 24 206 220
M20 30 412 450
M24 36 715 813
High pressure-hose
union nut
Hose size Tighten torque
(inch)
N • m
1/4” 25
3/8” 49
1/2” 59
3/4” 118
1” 137
1-1/4” 167
Thread Wrench
size size
metric (mm)