New 20t & 23t Hydraulic Excavator


KATO WORKS CO., LTD. launches the conventional excavator HD820-7 and compact tail excavator HD823MR-7 for the global market. These 2 model mount environment-friendly Stage4/Tier4 compliant engine. Also productivity and user-friendly have been enhanced with new design and features. HD820-7 is adjusted on the spool opening characteristic of the control valve, so it has been improved of the operation feeling and reduce cycle-time 4%. Put expansion tank (pressurized reservation tank) on a radiator, and the nature and cooling performance without air of the engine has been improved. Adopted renewed model bush of the dimple structure that special surface treatment was put in high durable new bush foot, arm foot, tip of arm. You can perform element exchange from the ground by locating them near a side cover, an engine filter, a fuel filter, the hydraulic fluid pilot filter and hydraulic fluid drain filter. The engine neutral start mechanism is adopted to make secure safety when start engine. You can start engine when safety lock lever is on lock position. Reduce power 25 Percent than ever. It’s easy to handle for log-time operation by renovating
grip shape. In addition, natural switch operation was enabled by changing the switch from the conventional parallel sequence to the anteroposterior placement.



  • The new SCR system cuts the NOx 88 Percent.

  • The large capacity DEF tank is available that replenishment of DEF is only 1 time of per 4 times of fuel replenishment.



  • The cycle time has been improved by 4 Percent for HD820-7 and by 9 Percent for HD823MR-7 compared to previous model.

  • Diameter of the boom cylinder hose and bucket cylinder hose have been increased. It reduces the pressure loss and minimizes the power loss.



  • The new dimple bush keeps the grease longer than before.

  • Filters and greasing port have provided to the location where it is easy to access.

  • The Cleaning space for the radiator is available.

  • The battery disconnect switch is available as standard and provides safe electric maintenance.



  • The new ROPS cabin enhances the safety and provides wider view.

  • The polycarbonate has provided to the door and protects from object such as scattering stone.

  • New engine start mechanism allows engine to start only if the safety lever is applied to lock position.

  • The ISO compliant handrail is provided and enable operator to access the upper structure safer.

  • The standard rearview camera and optional side view camera secure wide range view.


Comfort and user-friendly:

  • The air volume increased by 26 Percent compared to previous model.

  • The new operation lever decreases the operation burden by 25 Percent by new round shape grip.

  • Wide color display and touch screen control new APC has been provided. Various information are available on the screen. It is also enable operator to operate the Air conditioner via APC screen.





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