[CharlesWebster]

I have the Triton mounted in an enclosed table. It does indeed drop if you don't lock the height adjustment, but I reach under the table to turn on/off the power switch which is interlocked with the chuck lock, anyway.

I haven't experienced any heat build up, but my shop vac is connected to do both under and over-table dust collection, so I think the air flow it creates helps the cooling issue.

A lift is almost always better than the above table mechanism built into the Tritons, but the built in mechanism is always better than no top-of-table adjustments, so.....

 

[CharlesWebster]

It happens because the internal elevation screw vibrates and unscrews itself when the router runs. The problem goes away if you leave the plunge spring in when you mount it in the table, but then there is so much friction that it's trouble to raise from above the table.

You can avoid the reset problem, by before unlocking the lever, reaching under the table and turning the height adjustment knob until it contacts the carriage again. And then unlocking the lever. You can partially avoid the table by ensuring that you always make your adjustments on the "up turn" of the height adjuster. That keeps the screw in contact with the carriage better. But it doesn't work every time reliably.

I'd like to find a lower tension spring to replace the plunge spring to see if that cures the issue.

 

[CharlesWebster]

Many thanks Charles.
I put the spring back in this morning, and I had no issue with it dropping, although it was a bit stiffer to raise with the winder. The lower tension spring sounds like a good idea.
Where is the internal elevation screw located ?

It's between the winder and the elevation knob. Be careful using the winder and the plunge spring together, I've heard that the gear is only plastic and can be stripped easily, but have no personal experience.