[SteveC]

I have a similar issue with the cockpit tables on my 96 4000E. But I was able to raise my tables to determine why the motors would not raise them. It took 2 guys to lift it manually and in my case the ACME nut and screw were no longer threaded together, the nut had spun off the end of the screw, released from the nut housing and is stripped so I am not able to reattach it to the screw or table nut housing.

So in my case since the nut was no longer attached and I was able to raise by lifting by hand.

I emailed Tiara and they only have the replacement parts for ACME Screw, they do not have a replace for the ACME nut which is the part that needs replacing for me. I have looked at Grainger and some other local machine shops and no luck finding a replacement. So I am not looking into re-tapping the threads in the nut. Finding a TAP and the ACME thread size has been the challenge. I just ordered a ACME screw pitch gauge....but at first glance the taps I will need to rethread look very $$ for a one time job.

Any ideas or experience with this repair on the tiara 4000E?

I am starting to think replacing the ACME screw config with a hydraulic cylinder might be a better way to go.