IHI IC120, Руководство по эксплуатации

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MAINTENANCE
IC120 ENG 4-10
CHECK THE FIXED BOLT TORQUE
Tighten the bolts and nuts as shown in the table below.
If loose bolts and nuts are found in daily check, tighten them. If lacking bolts and/or nuts are
found, be sure to replace new parts with lacking parts.
When a new machine is used, check the bolts and nuts when first 50 hours have past. Tighten
loose bolts and nuts.
Special torque specifications
The bolts and nuts shown in the table below bear large
forces. Tighten them at the torques shown in the table.
When these bolts and nuts are replaced, apply the locktite
to the threads and tighten them at the specified torques.
Traveling-rated
Tightening torque
No. Tightening position Thread size
Wrench size
(mm)
N

m kgf-m
1 Travel reduction gear M20 30 476 48.5
2 Drive sprocket M20 30 476 48.5
3 Lower roller M24 36 850 86.7
• Observe the following procedures when attaching the
drive sprocket.
(1) Bring the inner surface of the sprocket into close
contact with the motor spigot when attaching the
sprocket.
(2) Tighten the bolts with the locktite applied at a
torque of 245 to 295 N

m first.
(3) Then, tighten the bolts in the order shown on the
right at the specified torque of 476 N

m.
Tighten the bolts quickly since screw locking agent
is applied to them.