© Apr 2022 6-6 TB18 Plus&20J Plus Maintenance Manual
REPAIR PROCEDURES
Figure 6-10
Figure 6-11
Figure 6-12
1. Slightly raise the boom until the main boom lift
cylinder is accessible.
2. Tag, disconnect and plug the hydraulic hoses and
cables to the boom assembly.
3. Using a suitable lifting device (capacity not less
than 5t), secure the lifting straps to the main boom
end.
4. Adequately support the main boom lift cylinder with
a suitable supporting device.
5. Remove the retaining ring at the pivot pin #1
connecting the main boom lift cylinder with the
boom.
6. Using a brass drift and wooden hammer, tap the
pivot pin #1 out.
7. Using a suitable lifting device (capacity not less
than 5t), secure the lifting straps to the bottom end
of the main boom.
8. Remove the bolts and keeper pins of the pivot pins
#2 and #3 connecting the boom assembly with the
support arm.
9. Using a brass drift and wooden hammer, tap the
pivot pins #2 and #3 out.
10. Using a lifting device, slowly lift the boom assembly
off the turntable.
CHASSIS AND TURNTABLE
COMPONENTS
Tires and Rims
Replacing tires and rims
Hunan Sinoboom Intelligent Equipment Co., Ltd.
recommends the replacement tires be of the same size,
ply rating and brand as the original tires. For the part
number of a specific machine model, please reference
the Part Manual.If the replacement tires are not
asHunan Sinoboom Intelligent Equipment Co., Ltd.
recommends, the following requirememts of tires
should be met：
1. Ply rating/rated load and dimension equal or
greater than original.
2. Tire tread contact width equal or greater than
original.
3. Wheel diameter, width and offset dimensions equal
to the original.
4. Approved for the application by the tire
manufacturer (including intended purposes,
maximum drive speed and maximum tire load, etc.).
5. Due to size variations between different tire brands,
both tires on the same axle should be the same.
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