Built to demolish: Kobelco introduces the SK400D and SK550D excavators

The new Kobelco SK400D and SK550D building demolition machines feature a 30-degree tilting cab.

Kobelco is expanding its series of building demolition excavators with the introduction of the new SK400DLC-10 and SK550DLC-10.

The new excavators are purpose-built to tear down and dismantle multi-story buildings, and the machines are engineered with practical features to increase jobsite productivity and reduce downtime.

With a reach of up to 24.6 metres and 27.4 metres, the SK400D and SK550D demolition machines can make light work of tall buildings. Both models are available with Kobelco’s unique three-piece separate boom demolition front and high reach front.

The separate boom tackles a wide working range and simplifies the demolition of lower and underground levels, while the ultra-long attachment enables the SK400D and SK550D to demolish levels up to nine stories high.

As well, large crusher tools — up to 3-tons on the ultra-long attachment and 5.3-tons on the separate boom — may be added for increased power and efficiency during demolition.

The Kobelco NEXT system

The SK400D and SK550D are equipped with the Kobelco NEXT attachment system. Each boom attachment is designed with a block structure that simplifies assembly and disassembly for quick setup and teardown. Side-mounted hydraulic piping can be attached at ground level for ease and safety.

The SK400D and SK550D also feature an integrated two-part counterweight; the first part forms a case in which the second part is housed, providing increased transportation options and quick assembly and disassembly. Water suppression is standard and is plumbed from the base machine to the end of both the separate boom and high reach fronts.

The Kobelco demolition machines are built with full track guides to prevent crawler de-tracking, even on rough ground littered with demolition rubble. Thick upper frame belly guards, a swivel guard, travel motor guard and cylinder guards provide added reinforcement to ensure durability and protect machine components from debris.

For safety, Kobelco has included a new standard cab interference prevention system that will sound an alarm and prevent the machine from allowing the working tool to come into contact with the cab during operation.

A demolition spec cab with a tilt of up to 30 degrees, stability warning system, rear and right-side cameras, as well as boom, arm and jib holding valves are also standard on the Kobelco demolition machines to enhance jobsite safety.

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Maintenance on the SK400D and SK550D is simple. An auto-lubrication system automatically greases the upper body at specific times to reduce maintenance time before operation.

Easy access to data from the operation management system (KOMEXS) improves ease of maintenance scheduling and ensures a long service life, while easy access to the cooling unit, engine compartment, electrical components, DEF and fuel refilling areas assist day-to-day maintenance. Cab guards on the top and front windows also open for easy cleaning.