Rock Products

JAN 2013

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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MAINTENANCE tems, ash from the oil can plug the diesel particulate filter. Therefore, if the right oil is not used, this will lead to in‐ creased truck downtime to complete more frequent regen‐ eration cycles, which reduces truck productivity and increases fuel consumption. which the tires travel also helps to extend the intervals be‐ tween refueling. According to Thompson, in a perfect world, grades would be no more than 10 percent. "As the grade in‐ creases, fuel economy suffers, but grades often depend on site conditions," he said. In contrast, a properly maintained engine filled with the rec‐ ommended low‐ash oil can go longer between oil changes. "Oil sampling analysis will help determine the proper change intervals for the application," said Thompson. One controllable factor with regards to haul roads, however, is their condition. Fill potholes, keep them as level as possible and remove any obstacle that causes excessive stopping and starting. Steady speed results in lower fuel consumption. Size Matters Lube Job Properly sizing trucks to the job may not seem to be a mainte‐ nance issue at the surface. However, attempting to haul more material than a truck is designed to in an effort to meet pro‐ ductivity goals will definitely cause maintenance issues. "Overloading a truck will shorten the service life of major big‐ ticket components such as the drivetrain, engine, axles and differentials," said Thompson. A critical, but often overlooked item is properly greasing joints and fittings. There are daily grease points for all trucks and areas that require lubrication at certain timed intervals. "Grease is cheaper than bearings," said Emmett. In fact, overloading a truck that is too small for the job may just have the opposite effect on productivity. "Productivity is a measurement of capacity and time," added Emmett. "An over‐ loaded truck may move slow enough to actually reduce over‐ all productivity." There are many factors that go into properly sizing a truck – capacity, productivity, transport, purchase price, and owning, operating and maintenance costs – in order to increase prof‐ itability for a company. Thompson recommends reaching out to the experts, such as Terex, and its distributors to help with proper truck selection for a job. Is It Covered? New Terex articulated and rigid haul trucks are covered with a comprehensive warranty. However, service technicians have a responsibility to make sure that the truck is properly maintained, so that a warranty claim is covered. Thompson mentions that the manual outlines all required maintenance items and intervals to keep the truck under war‐ ranty. He cites a rare occasion where an engine was severely neglected and a warranty claim had to be denied. The com‐ pany experienced an engine failure and submitted a warranty claim. Upon inspection, the oil in the pan was so thick that it held a ruler in an upright standing position. "Unfortunately because it was obvious that the oil was not changed according to the required schedule, the engine manufacturer had no choice but to void the warranty," he says. Trucks not properly lubricated create wear points. "Once wear occurs," said Thompson, "you cannot stop it. It just keeps getting worse until the part needs to be replaced." This is why Terex recommends the use of automatic lube sys‐ tems for their trucks. These systems are timed to automati‐ cally lubricate all required points at the correct intervals, helping to reduce maintenance and improve uptime. The technician needs only to pack the lube tube with grease. Your Local Connection Your Terex distributor is a vital link to maintain the health of your Terex truck. Often, distributors will offer maintenance and service packages to keep the truck running in peak condi‐ tion. All Terex distributors stock the required parts, like fil‐ ters, to keep your truck properly maintained. In the case of Terex Generation 9 articulated haul trucks fea‐ turing the latest Tier 4i engine technology, customers have another reason to rely on their local distributor. "Nearly all of our truck distributors are also authorized Scania engine dealers," said Thompson. Therefore, they are trained ex‐ perts in maintaining the new engines and to help you get the most from your truck. E Rick Zettler is president of Z-COMM, a Cedar Rapids, Iowabased marketing company. Keep on Rollin' It's been said many times but still bears repeating. A tire kept properly inflated will increase fuel economy. If the air pres‐ sure is low, this creates increased drag on the roll, which re‐ duces fuel economy. Looking beyond the tires, site maintenance for the roads on 60 ROCKproducts • JANUARY 2013

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