Probably a simple question...I have a 743B and I need to replace the chain case oil. The service manual says, step one remove the seat with no other details. The seat sticks in the track which may be part of my problem. There are some hex bolts in the track and seat but no where near enough clearence (vertically or between the bolt and track) to get a socket on them. Is there an easy way to remove the seat - for example should it come all the way forward out of the track?