I got to do controll valve seals on a 743 next week , I done this job many times but it has been quite a few years since I did it -------------- hoping to get a refresher course on the job , pretty sure I can pull the spools without pulling the valve , but seem to remember some variations of the machine were harder than others , remember using a long extension on a 1/4 " ratchet with a allen socket to undo the rear caps , but can't remember the front caps too well ------------ can any one walk me thru whats got to be moved to get to the front and how many hours should I figure so I can better plan my day