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3 – 20
ᵑ
MAINTENAN
C
E
500HOURS
3-7 500 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.
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)
Содержание 55N3
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