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INSIGHT Modern hydraulic


excavator equipment: 4 times bigger, 100 times more powerful In the last 60 years hydraulic excavators have become


Katty Hoste, Business Development Manager – Europe, Chevron Base Oils


100x more powerful, the bucket volume has increased 100x and the power to weight ratio has doubled. The volume of hydraulic fluid has increased from <1,000 litres to 13,000 litres.


During the same time period equipment failures have increased. Bosch Rexroth research has shown that the main causes of equipment failures are the hydraulic fluid and how the fluid is managed (filtration, water content, oil mixture e.g. after oil changes…) The cost of those failures is significant. A pump typically costs 2000 euro or more. When the down time is added in, the costs can rise rapidly. For example, in mining applications the equipment operates 24/7. If it is down for just one week, the cost could be up to 80,000 euro. While the cost would be lower in less demanding applications, such as agriculture, it is still an unnecessary expense that with proper lubrication can be reduced or avoided all together.


behind in large part due to the lack of specification updates. For example, the DIN 51524 has not been upgraded since 1985 and the Denison HF-O since 2004.


Automotive engine oil formulations dominate lubricant marketers’ blending strategies. During the last 20 years, in order to meet regulatory demands for reduced exhaust emissions and better fuel economy, both the European Automobile Manufacturers Association (ACEA) and the European Original Equipment Manufacturers (OEMs) have progressively tightened engine oil specification standards. Meeting those standards required complex formulation development work and passing expensive engine tests for engine oil certification. In general, hydraulic oils have not had the same specifications requirements, so blenders, less aware of changing performance needs, have made few changes to their industrial oil formulations.


Fundamentally, lubrication quality has not kept pace with hydraulic equipment technology. Engines with higher machine speeds and more powerful performance capabilities require better lubrication, but developmental progress on lubricant quality has fallen


26 LUBE MAGAZINE NO.145 JUNE 2018


That is beginning to change. Bosch Rexroth, the world’s leading manufacturer of hydraulic pumps has identified lubricant quality as the key to extending pump life. In the interest of helping customers protect their equipment, Bosch Rexroth has established performance standards for a lubricant to pass. The new Bosch Rexroth pump test is the highest standard in the industry for hydraulic oils. It identifies lubricant


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