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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
463/S70 tensioner spring?
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<blockquote data-quote="skayser2" data-source="post: 71080" data-attributes="member: 2179"><p>After more inspection of the tensioner pulley parts, I can understand why Bobcat is on their 3rd tensioner design for this unit. They used a bronze bushing to support the inside end of the shaft instead of a bearing as used at the outside end. It appears that the bronze bushing, which is designed to float, froze up in the housing and had not turned for quite some time. It eventually started wearing the bushing and shaft. The bushing is worn to the point that the shaft has started wearing into the support bracket mounted to the engine. I assume this lead to unnecessary fatigue on the spring end and eventual spring failure. Spraying "Store N Lube" periodically might have prevented the failure. <a href="http://i306.photobucket.com/albums/nn277/skayser2/Tensionspringfailure001_zps43fb325e.jpg" target="_blank">http://i306.photobucket.com/albums/nn277/skayser2/Tensionspringfailure001_zps43fb325e.jpg</a></p><p> <a href="http://i306.photobucket.com/albums/nn277/skayser2/Tensionspringfailure002_zps2efc12a5.jpg" target="_blank">http://i306.photobucket.com/albums/nn277/skayser2/Tensionspringfailure002_zps2efc12a5.jpg</a></p></blockquote><p></p>
[QUOTE="skayser2, post: 71080, member: 2179"] After more inspection of the tensioner pulley parts, I can understand why Bobcat is on their 3rd tensioner design for this unit. They used a bronze bushing to support the inside end of the shaft instead of a bearing as used at the outside end. It appears that the bronze bushing, which is designed to float, froze up in the housing and had not turned for quite some time. It eventually started wearing the bushing and shaft. The bushing is worn to the point that the shaft has started wearing into the support bracket mounted to the engine. I assume this lead to unnecessary fatigue on the spring end and eventual spring failure. Spraying "Store N Lube" periodically might have prevented the failure. [URL]http://i306.photobucket.com/albums/nn277/skayser2/Tensionspringfailure001_zps43fb325e.jpg[/URL] [URL]http://i306.photobucket.com/albums/nn277/skayser2/Tensionspringfailure002_zps2efc12a5.jpg[/URL] [/QUOTE]
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General Bobcat Skidsteer Forum
463/S70 tensioner spring?
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