Develon, formerly Doosan Construction Equipment, has launched the new DX140LC-7K 14.6 tonne crawler excavator, replacing the company’s DX140LC-7 model.
Whilst the performance and working range are the same as the DX140LC-7, the new machine incorporates many improvements that enhance safety and convenience both for the operator and for working on site, together with a better operator experience, particularly from a maintenance point of view.
The upgraded serviceability of the DX140LC-7K includes better access to the DEF tank and the fuel refilling hose. This is combined with a much easier approach for the operator to the engine compartment via new anti-slip steps and handrails positioned behind the cab. The anti-slip steps are protected and secured by a new door on the side of the excavator.
The DX140LC-7K also has a new flattened engine cover design that has reduced the maximum height of cover components on the back of the machine from 1285.5 mm and 1320 mm down to a uniform 1070 mm across all of the back of the machine. This now offers much better visibility for the operator both to the rear and to the right hand side of the machine.
Inside the engine compartment
Inside the engine compartment, changes have been made which have facilitated the new lower engine cover, including the repositioning of the PTO (Power take-off) for the rotation pump from the main pump to the engine itself. This has also allowed the size of the aftertreatment system to be optimized and for it to be lowered.
Elsewhere on the DX140LC-7K, Develon has removed holding valves from the main valve for better fluidity. These holding valves on the main valve are not needed in the EU, as they are standard on the boom and arm. This reduces pressure losses and creates less heat in the system. The air prefilter has also been moved for better performance and noise reduction.
Changes within the operator’s cab
Inside the operator’s cab, there is a new dashboard monitor with a state-of-the-art tablet design. The former hydraulic two-way pedal has also been replaced by an electronic two-way pedal, with a new PE3C electric pedal as a standard feature, together with a simplified hydraulic system.
The new excavator utilises a smart hydraulic system that offers an improvement of around 30% in attachment work, compared to previous excavator models. This system applies a smart hydraulic logic for optimal distribution of the hydraulic flow rate when both the arm and attachment are working simultaneously, with a new priority valve and an additional hydraulic line maintaining continuous hydraulic flow to the attachment, even when the arm is being used.
SPC3 Smart Power Controls
The DX140LC-7K is powered by the D34 4-cylinder Stage V diesel engine providing 86 kW (115 HP) of power at 2000 RPM. The impressive performance of the engine in combination with the hydraulic main valve and the SPC3 Smart Power Controls, provide increased fuel saving. There are four power modes available on the DX140LC-7K and the operator is able to set the power mode (P+, P, S or E) in both one-way and two-way working modes.
Tiltrotator Mode
There is a Tiltrotator Mode on the control panel in the new excavator, which can be selected to ensure an optimized hydraulic flow and helps to maximize the accuracy of tiltrotator work by eliminating back pressure. This tiltrotator mode is a special two-way flow mode, but it is managed by the EPOS like a one way flow mode, with direct return to the tank in each direction, to avoid back pressure and increase flow and controllability.
Develon Telematics Management System
The DX140LC-7K is factory-installed as standard with Develon’s state-of-the-art Telematics Management System for wireless fleet monitoring. This system offers a web-based fleet management solution which is very useful for monitoring the performance and security of machines and promoting preventative maintenance.
