im still trying to figure this forum out. here you go
The "SW" are for sidewalk, hence the 48 inch width. Most parts swap between the SW's and the J5.
You appear to have the winter (longer paddle) grousers: they turn harder than the summer grousers (and rubber grousers for on asphalt) but give it more traction in mud and snow.
PM me your email and i'll shoot you an operators manual from that era.
Do you have the side engine cover off, or is it missing? If missing, you might have cooling issues.
Welcome to this forum, Morin64 ! Nice looking SW48. I've never seen an attachment quite like the lifting frame on the rear... that looks useful.
Is your engine a Ford 6 cylinder ?
That is a log lift similar to a skidder. When you pick one end slightly off the ground it increases traction and really reduces the drag on the log.