JD 4020 Power Shift double split

[Kensk]

Have the tractor apart so these questions are about putting it back together when the time comes.

For the o-rings at the split, is there something a guy should use to glue them inplace to ensure they don't move when going back together. Yes, the dowels will keep alignment and so just some greas should hold the rings but wondering if it is common practice to do something different. I have only used grease but with a lot of things to watch when joining the housings I want o-rings to be something I don't need to watch.

For installing the clutch unit, the shop manual shows a pipe to make handling easier. It also says to use a salvaged spline assembly on end of pipe to align splines. Is this going to be something I need to be prepared to do or will it fit together with some wiggling and twisting.

One other thing that comes to mind right now, has anyone left those two bolts out that are behind the clutch pack? For what I have planned for this tractor I have no concern with leaving them out. However, if I ever split at transmission case but can't rejoin without access to clutch unit to align splines and so need to split at engine then I suppose bolts may as well go in.

Wasn't too bad to take apart, will see how many questions come up when going back together in a week or so.

 

[trackrat]

In my shop we always used heavy grease to hold o rings in place

 

[fdt860]

I would put the two boltsback in there.
Tractor was designed this way because it iscertainly not possible to line up stuffs properly and the mating of tge partsneeds to be done in two stages, with very lityle axial forces on the shafts

 

[Kensk]

Ok, yes grease is all I am familiar with for this kind of task to hold o-rings in place.

So, to get that clutch pack installed, I will be able to put it in with out need for an old spline shaft? If i do some wiggling and turning of input shaft from engine it will then slide in?

Is anything accomplished if a guy jacks up one rear wheel on tractor and turn the entire drive train to make it easier to get the clutch pack shafts to line up with transmission input shaft? Being a power shift transmission, maybe there is some drag on clutches that will get all gears and shafts turning in order to make splines line up.

 

[Kensk]

I see that reference to using an old spline coupler for installing the clutch pack is just to be able to turn the clutch pack input shaft while the clutch pack is lifted in place with a pipe over the input shaft. I should be able to make something up with a few pieces of keystock.

 

[Kensk]

Got the clutch housing and clutch pack installed today. I put those two bolts back in behind the clutch pack since the holes are open into the the transmission case and should probably be plugged. I think a guy could split at transmission housing if those bolts were out. Can turn the output of transmission which in turn will turn the input of transmission so could do that to line up splines with clutch pack if clutch pack input shaft wasn't accessible when rejoining housings.

Used a single pipe over transmission snout to lever clutch pack into place with hoist like shop manual. Used 3 bolts with heads cut off as guide dowels to rest clutch pack on once inside clutch housing then took pipe away and turned input shaft by hand. That idea of a pipe inside a pipe seemed an overly complicated arrangement, especially when you don't have the spline hub laying around.

 

[tim s]

I use sticky grease,, I have used supper glue on o-rings that did not want to stay in place