Don&#039;t know much about Hydra-Lectric.  But Larry Harsin does and Wiley got the information he needed from Larry.  Just in case anyone else is interested I&#039;ve copied Larry&#039;s answer below. 

&amp;quot;I&#039;m guessing that someone has utilized the power beyond port. There is a 1/2 inch pipe plug directly ahead of where the front hose hooks on for the left-hand valve. Remove this 1/2&amp;quot; pipe plug and see if there is a 3/8&amp;quot; pipe plug blocking the passage. Where this 3/8&amp;quot; plug would be sitting is approx. 2 inches inside. This 3/8&amp;quot; plug is blocking the passage that goes over to the hydraulic filter. Simply remove it and reinstall the 1/2&amp;quot; pipe plug and everything should work. Larry&amp;quot;   <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->