Massey Powershuttle? Yorque converter squealing !

Satamax · July 10, 2021, 05:16:18 PM

Hi everybody.

My crane has a "powershuttle" transmission

I understand that there is a torque converter in there. When i drive, the thing squeals, like a loose belt. But it isn't a belt.

Anybody ever heard that? What was the culprit? If ever you found out.

I know that a filter change is long overdue. But i can't seem to unstick the filter bowl. 3/4 ratchet, with breaker bar doesn't do it.

Well, if anybody is more savy than me on those, i'm all ears.

Thanks guys.

Satamax · July 11, 2021, 02:54:16 PM

Here's the insides.

It's a welded torque converter. Oil fed from the "nose" . I will change both filters. The return one seems clean. But I'll change it anyway. The pressure one is black. So that's for sure a replacement.

mike_belben · July 11, 2021, 03:02:36 PM

A non lockup convertor is usually just two housing shells with fins brazed inside and a stator plate assembly. If its truly inside the convertor i cant think of what it would be.

My quad has a single complex sealed brake assembly on back axle that has normal rubber seals and that thing squeeks so loud you can hear it for a mile. I think your squeek is more likely to be the convertor hub squeeking on a rubber seal in the trasmission pump than it is to be from inside the convertor itself. If i swerve around the weight on that hub will start or stop it.

Satamax · July 11, 2021, 06:13:38 PM

I'll know more once the filters will have been changed. Massey manual says no problems can come from the torque converter. Rather from the pump feeding it.

Satamax · July 12, 2021, 03:18:53 AM

And there is "electric hydraulic" forward and reverse. And clutch is ?? ?? . I mean, to change speed i need to press a button on the stick. And forward ans reverse are actuated with a switch at the wheel.

There is two hydraulic distributors, one big one, for forward and reverse. And one on the side, for the selecting the 4x4 mode.

But i haven't seen the clutch. But as i have seen on some diagrams from other machines, it could act on the torque converter. Freespooling it. But i don't know much about it.