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Message: <blockquote data-quote="walio123" data-source="post: 90691" data-attributes="member: 9827"><p>Let's think logically. If hydrostatic motors are weak, this should not affect the speed of the engine. Just will bypass oil and the speed of the tracks will be delayed, but not the engine speed - it should be easier to rotate in this case. The only reason may be the brakes, if not releasing completely.Even in this case there will be heat - motors must be much more warm than the pump.This can easily be checked. Another reason may be blocked rolls or too stretched tracks, but you wrote that there is nothing wrong. I still think that this is a problem in the engine fuel line, exhaust, or air restriction. These engines not have a separate supply pump. Fuel injection pump sucks alone. Could there be something wrong and not enough fuel with the engine running under load. For this in another post I wrote to try with tube on top of the cab.</p></blockquote><p></p>