Two
The crawler excavator is the largest and most powerful machine in the CASE range, and is bigger, stronger and faster than its predecessors, the popular CX700B and CX800B.
It is designed and built to deliver faster cycle times and maximise productivity in the most demanding mining, heavy construction and earthmoving applications.
In Germany, Backes Bau- und Transporte chose a CX750D in mass excavation version for its Dockweiler basalt quarry.
“The material is extremely hard and it takes considerable strength to break it and crush it. For this reason, when we choose an excavator the hydraulic power and breaking force are of importance,” says Thomas Backes.
“Knowing this, the CASE store in Andernach recommended the new CX750D ME featuring a shorter boom and arm, which allows for greater breakout forces.”
The CX750D ME has now delivered more than 300 hours of operation in the basalt quarry, and Thomas Backes says he is very satisfied with his CX700B, which has delivered an annual output of 250,000tonnes without a failure since its purchase in 2011.
“We expect the CX750D ME to deliver a comparably consistent performance as our CX700B over the long term. And, just like its predecessor, we expect this 75tonne excavator to achieve a similar flow rate as a 100tonne unit,” says Backes.
Bierbrauer und Sohn in Kretz approached the purchase of its new CX750D with different requirements.
While it was needed primarily for its quarry in Ettringen, it would also be used in earthmoving, material handling and demolition works. It also plans to offer the new excavator as a rental unit. This meant that versatility was of primary importance.
“We wanted to use our excavator for as many different jobs as possible, so we chose the standard mono boom with quick-coupler for use with concrete shears and hydraulic hammers, and a 2.9m³ HD Rock bucket for the quarry,” says Karl-Werner Bierbrauer.
Bierbrauer, a loyal CASE customer, says it has had very good experience with C and D-Series excavators, and the company’s fleet counts ten CASE excavators with operating weight ranging from 28-37tonnes, seven models with weights up to 15tonnes, as well as wheeled loaders and compact equipment.
“The concept in the D-Series is convincing. For our business, it is important that when we purchase a machine we get good value for our investment,” says Bierbrauer.
“For this reason, when the time came to purchase a new crawler excavator, CASE was the first choice.
“The machines are reliable, robust and powerful. And the D-Series’ engines are extremely problem free, they deliver a big performance and they are very economical. And Tier 4 certification is becoming increasingly important here in the Eifel region, as we have many natural reserves and historic cities.”
