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The main bearing structures are boom, revolving
frame and base frame manufactured of
low-alloyed rolled steel, thus allowing to operate
the excavator with full load in any season. Dipper and mechanisms are made of
high alloyed
steel grades. It guarantees fail-safety
at low dynamic loads.
Direct current drive operating as “generator-
motor” with digital control system based on
transistor exciters providing smooth acceleration
of converter, smooth control of speed and
pulls of the main drives at different variations of
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external conditions, reduction of setting time
and easy maintenance of the main drives.
Information and analyzing system with
the function of weighing of rock mass in dipper. Oversized operator’s cab meets the requirement
of ergonomics and modern comfort
level. The drive control system provides to move
on prepared track with speed 0.75 km/h, and
independent ventilation allows to operate in
continuous mode without overheating.
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