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Message: <blockquote data-quote="Fishfiles" data-source="post: 7180" data-attributes="member: 782"><p>I would suggest that your friend change the hydraulic oil as I would almost bet he has multi grade engine oil , like 10w30 or 15-40 in the tank as 10-30 was the recomended oil for years , but not any more , Bobcat changed to hyrdaulic oil in their hydrostatic and hydraulic applications , I have found that the heavier oil has played havic with the hydraulic oil warning and shutdowns , if the oil doesn't solve the problem I would look to the sensor then the wiring to the sensor as this has also been a common problem with the older 7 and 8 53's</p></blockquote><p></p>