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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Page 59 of 67

MAINTENANCE New Era For Truck Maintenance A Solid Discussion Up-Front Will Increase Their Confidence And Reduce Mistakes. By Rick Zettler Today's articulated and rigid haul trucks are designed to op‐ erate more efficiently and offer a longer service life than those of even a generation ago. Due to changing governmental emis‐ sions regulations, they also run cleaner. Manufacturers are constantly upgrading and fine‐tuning their truck designs. Even if there are no significant changes in a truck design – like a jump from Tier 3 to Tier 4i engines – there can be subtle changes made to a model. "We take what we learn from customers in the field and what we hear over the phone and incorporate this into our designs and in our service training programs," said Stu Thompson, product serv‐ ice manager for Terex Construction. This means that technicians charged with maintaining these trucks, so they operate in the most efficient manner possible, must stay abreast of changing designs and the required main‐ tenance intervals. In order to get the most out of your Terex trucks and ease the need for frequent fuel fill‐ups, here are some maintenance tips to consider for your service program. Be a Bookworm One of the most overlooked resources is the reference mate‐ rial that comes with every truck. "Technicians can really boost their knowledge by reading the operating and service manu‐ als that come with the truck," said Ken Emmett, truck product manager for Terex Construction. "More than 90 percent of the questions we receive are covered in the books." This is a suggestion not left for those just entering the service field. It's meant for even the most seasoned technician as well. "Every truck manufacturer's maintenance requirements are different," says Thompson, "and even different truck models within a family will have different maintenance requirements." This is why it is so important to study those manuals when first received and not rely on field experience. Failure to fol‐ low recommended service intervals outlined in the manuals can reduce the service life of a major component and void the truck's warranty. 58 ROCKproducts • JANUARY 2013 Tier Up Tier 4i regulations aim to reduce exhaust emissions. The good news with the changes is that fuel economy also increases for Terex trucks, which rely on Selective Catalytic Reduction (SCR) technology. "We have heard of fuel increases ranging from 5 to 15 percent with Tier 4i engines," said Thompson. Along with this positive, however, are engines that have more system components for technicians to learn how to maintain. This makes reading the manual even more critical. The new engine designs also add the truck operator as the first line of defense against engine issues, since they will be the first to notice changes in truck performance. Thompson outlined a series of "Don'ts" for both the operator and service technician when it comes to Tier 4i engine tech‐ nologies. n Don't run out of Diesel Exhaust Fluid (DEF) (for trucks using SCR engine technology). n Don't try to substitute DEF with water or fuel (for trucks using SCR engine technology). n Don't consistently bypass the regeneration process (for trucks using Exhaust Gas Recirculation [EGR] engine technology). Trying to "trick" the emissions system will only lead to major engine issues. "You can't get around it," advised Thompson. "By improperly operating and maintaining the engines, you can burn out the dosage module for DEF and greatly shorten the life of either the diesel particulate filter or convertor, which are all costly fixes." Not paying attention to the emis‐ sions alerts will only lead to the engine derating to the idle po‐ sition, so the truck cannot operate properly. Oil and Ash Especially when it comes to today's trucks, all oils are not cre‐ ated equally. "Refer to the manual to find the recommended oil for your truck," said Thompson. Tier 4i engines require low ash oil. For trucks with EGR sys‐

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