Question on Controller for FastTrack O36 Switch

Take the cover off the remote control (4 screws on the underside). Examine the lever and you should see a centering spring below the shaft. see if that spring is functioning correctly.

The screwdriver tip is pointing at the centering spring:

I have 22 of these controllers, and none return to center. I think the spring is for the momentary contact release.

I'll check it out today - thanks for your responses.

Ive never seen one that centers itself....   Just flops back and forth.

Normal. 

Oh, I should have said stay-in-place spring. No, it doesn't act to center the lever but rather kind of the opposite. It tends to hold the lever in place so it doesn't flop about. It is the same action (only greatly subdued) that holds any toggle switch in the position it is thrown to. When I had remote controls mounted vertically (instead of flat on the control panel) the levers would stay in whichever position they were placed with the spring creating enough friction to overcome the pull of gravity.