The new range covers the PC30MR-5 (3.15-3.3 tonnes operating weight), PC35MR-5 (3.62-3.77 tonnes), PC45MR-5 (4.86-4.98 tonnes) and PC55MR-5 (5.14-5.26 tonnes) and the excavators are available in both canopy and air condition cab ROPS-compliant options.
"Our new MR-5 range boasts many industry firsts, and is packed full of outstanding new and improved features," Carl Grundy, Komatsu Australia's national sales manager - utility, said.
"These include advances in operator comfort, increased safety, improved ergonomic design, even lower fuel consumption, advances in controllability, the latest version of our KOMTRAX remote monitoring system - and the highest levels of standard specifications offered in the industry.
All four machines feature US EPA Tier 4 Final compliant electronically-controlled engines with either the Komatsu 3D88E-7 rated at 18.2kW for the smaller PC30MR-5 and PC35MR-5 or the Komatsu 4D88E-7 rated at 29.6 kW for both the PC45MR-5 and the PC55MR-5.
"In addition to delivering far lower emissions, these new minis use between 5% and 7% less fuel than their MR-3 predecessors - with no loss of performance or productivity."
Grundy said that in developing the new range, Komatsu engineers had prioritised reliability and rugged design solutions to further reduce machine down time and lower operating costs.
"Auto deceleration and idle shut down now both come as standard, for reduced fuel consumption, increased residual value and lower service costs," he said.
"All new models have standard two-way auxiliary piping for increased productivity and machine versatility when working with attachments.
"In addition, the PC45MR-5 and PC55MR-5 are fitted as standard with a second auxiliary circuit to enable fitting of tilting hitches, thumb buckets and the like.
"And across our MR-5 range, newly developed hydraulic electronic controls - here seen on mini excavators for the first time - ensure optimised machine performance and lower fuel consumption, whatever the job.
"This, combined with selectable working modes - a concept usually only found on larger excavators, ensure optimum matching of machine power output to jobsite conditions, for easier operation and reduced fuel consumption."
According to Grundy, cabs on the new MR-5 range have been redesigned, inside and out, for more functionality and a new more modern look and feel.
"Accessibility has been significantly improved thanks to a new hinged door design, while a high-resolution multi-functional 3.5-inch LCD colour monitor panel, with maintenance and warning information clearly displayed, improves ease of use and ensures quick and easy troubleshooting," he detailed.
"A dial type fuel control further increases operator comfort and convenience."
A number of new features contribute to increased operator safety on the new MR-5 range.
"Our new control lever Neutral Detection System is an industry-leading safety feature that prevents accidental operation if controls are inadvertently knocked or grabbed," Grundy said.
"Other safety features include an engine shut down secondary switch and a seatbelt caution indicator.
"An easy-to-use tie down bracket provides fast and easy transportability, while ensuring the machines can be securely restrained."
As standard, all MR-5 machines sold in Australia, New Zealand and New Caledonia are covered free of charge with Komatsu's KOMTRAX remote monitoring system.