Hi All, I need some advise. I rebuild all the cylinders and I put new seals on the control valves. everything seemed to go ok. I replaced the mail suction feed line to the filter, again, all went well. I fired up the machine and watched it pull oil through the new hose ( I replaced it with a industrial clear hose). here's where I need help. I know the pump is working at least a little as it drew in fresh oil. when I go to use the speed adjustment it just wines, doesn't mater what direction you push it in. it dosent sound like its coming from the pump though. is it possible its just bleeding out air and that's what im hearing? as a side note, I don't see the sheave move at all. is there a way to test to see if its stuck? any help would be appreciated.