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Maintenance Manual for Crawler Crane
4.8.2 Slewing ring
(1) There is danger of being dragged into pinion gear when doing the maintenance and
service work.
(2) Danger of smash and cutting. Make sure that no maintenance personnel is standing
on the dangerous zone between the main boom, superstructure and the slewing
ring, and also the dangerous zone between undercarriage and the slewing ring
when the crane slews or changes its angle, excluding crane operator(in the
operator’s cab).
4.8.2.1 Inspection of slewing ring bolts
Figure 4-25 Installation of slewing ring bolts
Table 4-11 Mounting bolts of slewing ring
Product
No. Names Specification Quantity
Use loctite
Remarks
ZCC1300
1 Bolt M30×200-10.9 54 √
As to
tightening
torque for bolt,
please refer to
section 7.1.
2 Bolt M30×210-10.9 54 √
ZCC1800
1 Bolt M30×260-10.9 60 √
2 Bolt M30×300-10.9 52 √
ZCC2600
1 Bolt M33×255-10.9 72 √
2 Bolt M33×270-10.9 72 √
a)
1
2
Slewing table
ndercarriage central section
4-37
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