Un Z splitting an Oliver 550

Z-splitting the 550 was easy. Lining up the driveshaft with the driven plate splines and pilot bearing while also lining up the PTO shaft splines isn't so easy, mainly because the driveshaft lays in the bottom of the PTO shaft tube, ie. it isn't centered in the PTO tube.

I made an alignment shaft which aligns the pilot bearing, driven plate, and pressure plate and used it for bolting the clutch back onto the flywheel. While fitting the tractor back together, I can feel the PTO splines engage but I am unable to engage the driveshaft splines into the driven plate.

As I understand them; the detailed instructions on splitting a 550 (located elsewhere on this site) state to put the pressure plate and driven plate on the shafts and them bolt the pressure plate to the flywheel after the tractor is back together. This can't be accomplished if you only Z-split the tractor; you'd have to take much more apart. Did I misread something? It wouldn't be the first time. If you guys have any tips, I'd sure appreciate them. Thanks.
 
I giggle it a little and hit the starter just a touche and they will go togeather.
make sure you havent bent the pressure plate splines.
 
When reassembling, I could feel the PTO shaft at the point of spline engagement. I engaged the PTO clutch then turned the PTO shaft (at the rear of the tractor) until it felt like it wanted to go. Wasn't sure how much farther it was until the drive shaft splines needed to mesh but I knew it couldn't be much closer. I wasn't real excited about the bumping the starter technique because I thought it was a bit too aggressive for two spline faces that are just rubbing faces with each other. Instead, I pulled the spark plugs and rolled the engine over by turning the fan. I'd tighten the bolts a quarter turn, roll the engine over, and repeat. I never did sense the point of driveshaft spline engagement, but it went together just fine.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top