John,

My S77 with the PSB pump has ben sitting a few years and about to start her soon. Took off the pump timing window and pulled the control unit. It&quot;s very stiff so I guess I&quot;ll pull it apart tomorrow and clean it and the sleeve. Stuck the screwdriver into the control sleeve slot and it seems to move freely. How much movement should be in there? Didnt seem like much. Is this all I need to do to ensure hydraulic head wont break on me?