CAP 8G0935 - Caterpillar

Excavator:
AllService Magazine SEPD0891, 04 June 2007, "Managing the Life Cycles of Excavator Final Drives". Disregard this article. See the replacement article that follows.Several sources of information are currently available with guidelines for the wear analysis of the final drives in Excavators. Certain information could be easily misunderstood. Information that is misunderstood can cause unnecessary repairs. A comprehensive study of the final drives in Excavators was performed in order to provide one safe source of information. The result of the study is reflected in the following information. The following guidelines provide an explanation of the wear analysis and the contamination that occurs in final drives. The guidelines provide a plan of action in order to address abnormal conditions. Unnecessary action that is performed beyond the guidelines is not recommended.Certain compartments can routinely generate widely varying amounts of debris accumulation. The following variables affect wear in a compartment: geographic locations, climate, type of lubricant, maintenance practices and operating techniques. The variables create a broad range of data from the oil analysis. These guidelines were developed in order to better understand the results of the oil analysis by the S O S interpreter and the Caterpillar dealership. The correct understanding of the results of the oil analysis will improve the management of the machine. The correct understanding will also decrease the operating costs for the customer.Differences Between Final Drive Operation And Application
The final drives in Excavators move the machine between locations. The final drives in other Caterpillar machines move the machine and heavy material between locations.In a typical application, Excavators operate for many hours with very little movement of the tracks. When an Excavator moves, the travel speed is much slower than other Caterpillar machines with final drives. Also, the seals in the final drives on Excavators are located close to the ground. The final drives on other Caterpillar machines are located higher from the ground. The seals in the final drives that are located close to the ground provide an increased opportunity for packed dirt or packed mud. Machine movement can force dirt or mud beyond the seals and into