LT230 intermediate shaft

[POD]

Have just completed a reco of the LT230 in my Puma 130. Chief reason for the job was a leak from the intermediate shaft front O-ring. As expected, the bore was slightly oval, thus the O-ring never stood a chance. Hopefully this is a more permanent solution than just fitting a new O-ring and hoping for the best;
Bored the housing out .600" oversize and made a bush out of some 4140
The bush is a .001" clearance fit on the shaft and a press fit in the enlarged housing bore.
http://www.aulro.com/afvb/images/attach/jpg.gif
Pressed in with a little loctite 640 for good measure
http://www.aulro.com/afvb/images/attach/jpg.gif
From inside the case:
http://www.aulro.com/afvb/attachment.php?attachmentid=105635&stc=1&d=1455360054
A few hundred Ks on it thus far and bone dry (touch wood). Also much quieter with the new bearings, got rid of noises I hadn't even realised I had.
Have to do the same job on a mates 110 in a couple of weeks, I expect his to be much worse than mine.

[Bearman]

Nice job!

[Surrufus]

As a fitter and machinist and hydraulic technician, I can appreciate the effort that has gone into this job. Getting it done right, and fixing the issue once and for all is definitely the way to go.
Love your work :cool:

[roverrescue]

I'm Always wanting to learn mr POD. What was your rationale for not putting a shoulder in the bush and step in the case?
I too did this job, used 4140, that was about 18months ago ago still no leak.
Following Noel (ancientMariners) lead I made a stepped bush a light press fit and also used locktight 640 at time of fitting.

Kind regards

Steve

[Vern]

I need to do this to mine, if I only had the tools and skills! Great work Peter:)

[Blknight.aus]

Very nice.

With the bush that far over the nominal size Im going to guess that it shouldnt need stepping to hold it in place, if its positioned correctly the flanges from the gearbox and Tcase foot mounting bolts should back it up.

I kind of always wondered why it was never setup to step from the inside.

[POD]

Hi fellas, thanks for the replies- I'm certainly not the first to do this and it is far from an original idea on my part, just nice to have the gear to be able to do these kinds of jobs. I'd hate to be paying a machine shop to do it.
With regard to stepping the bush, I'm prepared to stand corrected but I just can't see the necessity for it; the shaft should not move in the axial plane at all once installed thus there shouldn't be any axial load on the bush as far as I can figure. I guess time will tell. Would be simple enough to do, but, as has been hinted at, from which direction to step it? I pulled this bush into position from inside the case as the outside offers a flat surface to pull it up to, no more science to it than that.

[POD]

I need to do this to mine, if I only had the tools and skills! Great work Peter:)

I probably still owe you a favor or two Damien, why not bring your housing and shaft down to me when you have it apart and we can sort it out, perhaps leave it with me for a week or so, I'm still a bit slow with the machining for a while-u-wait service.

[Vern]

You owe me nothing Peter, but if your willing i'm happy to pay for it.
Cheers

[Rick1970]

Really need to do this with the case in my rangie. It leaks there, and guessing with over 600k on it now the chances of just replacing the o-ring for a fix are quite slim.


How is the setup on the mill bed? Just clamp down and good to go, or packing required?

[POD]

Really need to do this with the case in my rangie. It leaks there, and guessing with over 600k on it now the chances of just replacing the o-ring for a fix are quite slim.


How is the setup on the mill bed? Just clamp down and good to go, or packing required?

I clamped the case down with the machined areas of the bottom (rear) face sitting on a pair of wide parallels.

[POD]

Well this seems to be habit forming...

[POD]

Info for those who undertake this job, the bush does in fact need to have a step. The first one that I did, shown in this thread, migrated inwards despite some permanent-assembly Loctite. The gearbox will prevent outwards migration.