MAINTENANCE 9VX3
500 HOURS MAINTENANCE AND CHECKS
First perform previous service hour items
■ 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.
Items Tighten point
Wrench Size
metrie
Thread
Size
Tightening Torque
(N*m)
© Travel drive Bar 8 M10 54
© Sprocket Bar 8 M10 54
Lower roller
19
M12 97
©
Swing bearing 17
M10 59
© Swing motor Bar 10 M12 97
© Swing gear case 17 M10 P1.25 55
Newrtonmeter (N-m) is approximately the same as 0.1 kg-m
2. General torque specifications
Other than above-mentioned, refer the next table for torques.
Thread
Size
metric
Wrench
size
(mm)
Tighten torque
Metric
coarse H.T.
(N • m)
Metric fine
H.T. bolt
(N • m)
M8 13 23 25
M10 17 47 50
M12
19 83 91
M14 2 2 134
135
M16 24 208 221
M20 30 411 452
M24
36 715 811
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
4-8-1
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