Liebherr’s then new T 282B 363 t payload truck 17-139 started work at Syncrude’s North oil sands mine on March 24, 2005. reaching the milestone of 100,000 operating hours on March 28.
Syncrude Site Reliability Engineer Paul Wohlgemuth sees achieving that milestone as a success story with several authors.
“The oil sands are the toughest proving ground in the world. The operating conditions challenged this truck, just as they do with any equipment,” says Wohlgemuth, who joined Syncrude in 1989. “Syncrude purchased the Liebherr truck based on its strong performance in hard-rock mines. The softer underfoot conditions in the oil sands initially posed difficulties.”
He adds: “Thanks to hard work and collaboration between many people in different business units and the manufacturer, we found solutions that led to this accomplishment. The work we’ve undertaken means today’s Liebherr haul truck is not the same truck we purchased in 2005.”
An 11-point upgrade program identified and addressed issues to improve the reliability and longevity of the 26 trucks, which are unique in the oil sands. The truck has linkage systems on the front suspensions and hoist undercarriage. It also has an electric drive train. The 11-point program targeted the truck’s structural issues.
“Liebherr has an advanced engineering arm and they are great to work with. They were very open about sharing technical information with us, which was crucial in helping us understand and address the challenges with the suspension and structures,” he says.
Syncrude also identified issues caused by the diesel fuel produced by Plant 14 and the high-pressure fuel system that created challenges with the injectors. “We needed to address the diesel fuel mix so it wouldn’t coke in the high-pressure fuel system and damage the injectors. We changed the specifications on the diesel fuel mix and added a stabilizer to prevent coke particles from damaging the fuel injectors,” Paul says. “Detroit Diesel, who produces the engines for the Liebherr trucks, was very helpful in working with us on that issue.”
“Carrying tailings cake required a different box and tailgate for the truck than hauling oil sands ore,” says Sherill Stevens, Business Team Leader – Trucks & Productivity for the past four years at Mildred Lake Mining. “The Mildred Lake Mobile Maintenance shop led by Keith Singer helped fabricate new boxes and tailgates for the repurposed trucks as well as keeping them on the road.”
Craig Coolen, Manager – Mine Mobile Maintenance, also praised the nearly 140 employees and contractors who maintain the fleet at Mildred Lake shop.
“Our maintenance technicians have demonstrated world-class performance in ensuring we meet our goals of being reliable, responsible, safe and profitable,” Craig says. “In our shop, that means keeping our fleet available to move the ore and overburden necessary to meet our production goals and the tailings cake to meet our commitments of being a responsible operator. Reaching this kind of milestone demonstrates how well they do their work shift after shift with the support of their peers in Operations and our Technical organisation.”
And given 17-139 had an expected life of 72,000 operating hours, Wohlgemuth sees another lesson imparted by the truck. “It challenges people’s thinking about equipment. It doesn’t have to get old and die within its expected shelf life. It demonstrates what you can do with a good maintenance program and collaboration between our operating, maintenance and technical organisations.”
Coolen commented: “This truck has operated for far longer than anybody ever anticipated when we first purchased it.”