Mf 6465 lost drive

[rob h]

Have a problem with our 6465 t2 dyna 6
. Lost drive whilst going up the road just free wheeled to a stop.showing error code t1.37. Slippage in the power shuttle. all hydraulic and pto work.when i try setting off it rocks forward like its trying to move but that’s all.ive had gages on the test ports and pressures good forward and reverse.has anyone had this problem ?

 

[dee]

There is 2 epicyclic units in the back of the Dyna 6 unit that are connected by a gear bolted onto one of them.
These bolts will be sheared causing your issue.
You'll need to take the front part of the gearbox out and remove the f/r clutch packs.
The epicyclic units are attached to the front of them.
Hope this makes sense

 

[jd6820]

There is 2 epicyclic units in the back of the Dyna 6 unit that are connected by a gear bolted onto one of them.
These bolts will be sheared causing your issue.
You'll need to take the front part of the gearbox out and remove the f/r clutch packs.
The epicyclic units are attached to the front of them.
Hope this makes sense

Yeah I'd agree with the above. Had one the other day do exactly the same.

 

[rob h]

ok thanks for the replys.we are still drilling so it will have to wait till weve finished before i start pulling it apart.

 

[rob h]

well ive only just got round to working on it this week as its a bit wet for drilling. so far found damper plate past its best but i think the problem lies els where as the hydraulics and steering were still working

 

[box]

You got your moneys worth out of that one!

 

[rob h]

I don't think it was going to do many more hours. Just need to find out what did stop it now

 

[Farmer_Joe]

Interested to see how you get to back of gearbox and what needs to come off, keep posting pics!

 

[rob h]

Front half of gearbox removed today. Hopefully tomorrow will have it pulled apart and see what is brocken

 

[dee]

@rob h
Remove the back side with the clutch packs first.
You will see 2 epicyclic units.
Remove them and split them there will be a gear in the middle.
The studs holding the gear will be broken

 

[Farmer_Joe]

great work, mines developed a tiny drip of leaking oil between those last 2 gearbox sections think i will let it develop!

any easy looking oil seals to replace!!!

 

[rob h]

No seals at all.its all sealed with loctite sealer.have you checked the bolts I would go round them all just incase might stop the leak

 

[rob h]

Well it's exactly as you said. It's made a mess of the back where the snapped bolts made a groove.

 

[Speedstar]

Well it's exactly as you said. It's made a mess of the back where the snapped bolts made a groove.View attachment 1073681View attachment 1073681View attachment 1073682

it is all ways nice to find the problem when you take some thing apart

 

[fermerboy]

Good work, well done to the TFF who knew the issue.
Assuming it's a common problem?
As Speedstar said its a result to actually find a fault.
Shame the hubs so scored though.

 

[davidroberts30]

Lathe it back flat?

 

[rob h]

Good work, well done to the TFF who knew the issue.
Assuming it's a common problem?
As Speedstar said its a result to actually find a fault.
Shame the hubs so scored though.

It’s always good to get advice from someone who has had the same problem.it would be annoying taking half the tractor apart to find nothing or you’ve taken lots apart That wasn’t needed.just shows the benefit of forums

 

[rob h]

Lathe it back flat?

I think it would weaken it too much

 

[davidroberts30]

I think it would weaken it too much

TIG the groove up then lathe it flat and rethread the holes

 

[Sausage]

Welding is worth a go if you can turn it yourself, but distortion will be a problem. I would advise you address the groove (I.e. don’t put back as is) so the bolts are in pure shear rather than shear and bending.