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Posted by Steve Hayes on Saturday, April 28, 2018:

In Reply to: Re: case 580ck diesel backhoe leaking oil from bottom of starter nose posted by thepumpguysc on Saturday, April 28, 2018:

(I also just did this) ..... There is a chance that the seal is not at fault in the 580, Case used the trans casting in the early 580 that was used in the ag line. There was a tube built into the rear casting to bring leakage from a leaky rockshaft piston back to the front without diluting the 90 wt in the rear. In the industrial models w/o rockshaft,the pipe was blocked off with a plastic cap and a spring type hose clamp. Usually these would fall off and oil would transfer front to rear. Remove the shift cover for the 4 speed, on the brake pedal side tucked up in the corner up front you will find this pipe sticking back, should have a cap on it. if no cap, Case supplies a groove pin to drive in to seal it, Check it, its an easy fix if plug is not there, seal failure is uncommon on the trans input shaft but possible. The plug gone is more likely, mEl.... ( is it possible that sealing that tube could be building up pressure and making the starter nose seal to leak ?? )

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