Different from other excavators, the
long-arm excavator adds an extension jib between the machine body and the
working arm, which is supported by oil cylinder. And one working jib oil
cylinder and one bucket oil cylinder are installed on the long arm, for which one
set of oil cylinder operating system is equipped to support the movement of the
two oil cylinders. All of these designs double the moving range of the large excavator bucket, which can go higher, deeper and further. The great changes
make the long-arm excavator especial for minerals, docks, storage and emergency
rescue.
The long-arm excavator has the following
advantages:
1. Need
less labor
The high mechanization and simple operation
of the long-arm excavator makes higher efficiency and shorter working schedule
possible.
2. High
quality
In order to guarantee the reliability of
the long-arm excavator in working process, strict quality standard is made to better
guarantee the construction quality.
3. High
safety
The distance between the operator and
the operating object is long to reduce dangers in the working process.
4. Strong
practicability
The long arm of the excavator can work
in the tough place where other excavator can’t reach, and it meets the
requirements of various construction sites.
The maintenance of the long-arm
excavator
Good maintenance can extend the service life
of the long arm and enhance working efficiency, especially in tough
environment.
1. Have
the long arm greased at least two times every day. After working in muddy
water, wash the machine before adding fuel. Check the joints of the working
device to make sure it has enough fuel before starting working. Don’t add new
oil until completely pushing the aging oil out by operating the swing arm, rod
and bucket for several times.
2. Wash
the machine after working in the shore to remove the salt, and add machine oil
if necessary. In cold winter, the piston rod should be put back to the
hydraulic cylinder to avoid the clay and water sticking to the piston rod and
damage the seal ring of the hydraulic cylinder.
The long-arm excavator should observe
the following guidelines:
1. When
making a rotation, the long-arm of the excavator should be 0.5 meters high from
the ground.
2. Forbid
knocking the heavy excavator vigorously when the bucket is working, walking and
rotating are not allowed either.
3. The
piston rod of hydraulic cylinder should not move to the bottom, safe distance
should be reserved.
4. The
long arm should not be overloaded.
5. Don’t
dig directly in the rocky area, crush the rocks before excavating.
6. The
bucket load should match with the specified standards; overload will shorten
the life of the long arm and the excavator.
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