Mining excavator technology

Mining excavator technology

Components, systems, and services for hydraulic excavators

HYDAC offers expert system solutions for excavator applications despite the many challenges that abound in this machine group.


Excavator challenges

The development of modern machinery is characterised by shared requirements across various excavator sizes.

In this context, HYDAC supports machine operators and optimises work processes with the aid of modern electronic assistance and visualisation systems.

Changes to the regulatory framework also result in increased investment in the functional safety of machines and to further development of excavator drive and control systems.


HYDAC's contribution to excavators

HYDAC offers a variety of components and systems that overcome excavator challenges and meet customer requirements, including a comprehensive modular system designed for excavator applications.

The company’s development team and applications engineers work continuously to further develop products.

The focus of these developments is on the following key topics.

Excavator technology

Increases in:

  • Excavation and digging performance (digging forces and breakout forces)
  • Use of energy-efficient pumps and valve technology (optimal positioning in working position with sensitive controls and accurate repeatability for automatic and control functions)
  • Corrosion resistance owing to surface coating and special materials

Reduction in:

  • Piping and installation expenditure due to combined hydraulic function units
  • Noise emissions and power consumption through regulated fan speeds
  • Driver exposure to dust due to cabin ventilation systems
  • Hydraulic oil tank sizes by optimising air separation in hydraulic oil (proven through simulation and testing)
  • Installation space, component weight and electrical power requirement by reducing solenoid valve sizes
  • Driver learning curve through intelligent control and visualisation systems
  • Software development time by using tested and certified software libraries
  • Development times by means of HYDAC modular systems and industry know-how
  • Assembly times through control technology tailored to customer specifications

Extension of:

  • Maintenance intervals by monitoring hydraulic oil quality


Customer excavator benefits

Customers with excavators enjoy the following benefits:

Energy efficiency

  • Reduced fuel consumption
  • Lower hydraulic losses
  • Energy saving and recovery
  • Precise cooling-requirement temperature control
  • Reduced electrical power requirement


  • Certified software modules
  • Systems for functional safety
  • Service life increased by protecting materials

Noise reduction

  • Lower noise level in partial-load range of fan control

Health and safety

  • Reduced driver exposure to dust
  • Reduced driver exposure to aerosol

 Less space occupied

  • Combined functional units
  • Integrated tank and filter systems

Function integration

  • Reduced number of components
  • Reduced weight
  • Reduced joints and leakage points


  • Improved working environment for the driver
  • Sustained driver performance on longer jobs


  • Compliance with emissions directives
  • Reduced nitrogen oxide and CO2 emissions


Hydraulic excavator categories

Following is a quick overview of the various hydraulic excavator categories.

Mini excavators from 0.3 to 6.0t

  • Compact excavators from 5.0 to 12t
  • Adjustable undercarriage
  • Boom can swivel to side
  • Dozer blade
  • Upper carriage tilting
  • Quick-coupler systems

Mid-range excavators from 12 to 60t

  • Standard boom or adjustable boom
  • Dozer blade for short-swing excavators
  • Quick-coupler systems

Large excavators from 60 to 200t

  • Backhoe excavators
  • Shovel excavator
  • Quick-coupler systems

Mining excavators 200 to 1000t

  • Backhoe excavators
  • Shovel excavators

Walking excavators up to 12t

  • Up to four control circuits (with four hydraulic pumps)
  • Boom can swivel to side
  • Hydraulic telescopic boom
  • Complete hydraulic chassis adjustment
  • Hydrostatic two-wheel and four-wheel drive
  • Mechanical telescopic leg (three-fold)
  • Hydraulic telescopic support (slope support)
  • Rope winch connection on chassis (optional)
  • Quick-coupler systems

Mobile excavators from 5.0 to 30t

  • Adjustable boom
  • Dozer blade and support brackets
  • Axle oscillation lock
  • All-wheel steering and all-wheel drive
  • Quick-coupler systems

Material handling excavators/machines

  • Wheel or crawler chassis
  • All-wheel steering and all-wheel drive for wheel chassis Support plate or support brackets
  • Adjustable driver’s cab

Excavators – special designs

  • Road-rail vehicles
  • Short-swing/zero-swing excavators
  • Long front (slope equipment)
  • Demolition (demolition equipment)
  • Forestry (forestry equipment)
  • Pipelayer (pipe-laying equipment)
  • Telescopic boom
  • Cable/rope excavators


Excavator function overview

Main functions:

  • Boom, stick and bucket cylinders
  • Swing drive
  • Traction drive (wheel/crawler chassis)
  • Additional control circuits

Additional functions:

  • Boom adjustment (mobile excavators)
  • Dozer blade (mini, compact, mobile, and short-swing excavators)
  • Support brackets (mobile and material handling excavators)  Track adjustment (mini and demolition excavators)
  • Quick coupler
  • Hammer function
  • Grab and pincer function (turning, opening/closing)
  • All-wheel steering (mobile and material handling excavators)
  • Cab adjustment (material handling excavators)
  • Articulated joint adjustment (mini and compact excavators)


Excavator sensors, system electronics and control systems

HYDAC tailors sensors, system electronics and control systems to an application from a single source.


For further information on all HYDAC has to offer excavators, download the relevant pdf at: