Sealed and lubricated track

I have a set of sealed and lubricated track on a D7g , The bushings are well worn is it possible for them to leak the lube away and start squeaking and howling like dry rails? Can new pins and bushings be installed and relubed? Or is it just best to run to destruction and buy new? I was going to have an undercarriage
specialist out to go over machine but I think I waited to long,😞 Advice please, Thanks in advance BIF

How worn is well worn? Certainly possible to have dry bushings in an old SALtrack. Have bushings been turned already? How tall are the rails? If rails are worn out, no sense in spending money on bushings.

Crawler heaven website lists New rails 4.96" and 100% worn at 4.53"

https://sites.google.com/site/crawlerheaven/wear-limits---tracks

Here is some good info on dealing with S & L track.

1. You have two options for turning pins and bushings in salt (sealed and lubricated) chains. A grease turn or a true lubricated turn. The grease turn is pressing the chains apart and greasing the pins and bushings then pressing the chain back together reusing the old seals. The true lubricated turn is pressing the chains apart and replacing all of the seals then turning the pins and bushings and pressing the chains back together. A true lubricated turn requires a vacuum ran on each pin and bushing and checking for leaks. If no leaks, install oil back into each joint then equalize the pressure back off then insert a new plastic plug back into the pin. Some chains don't have a plastic plugs. Some just have a rubber stopper that we stick a needle through to run a vacuum and oil. A good rule of thumb is when you perform a pin and bushing turn, replacement, or new chains, always install new sprockets. The reason for this is the old sprockets wear with the pins and bushings. For example, installing new chains with old sprockets throws the pitch off. The pitch is the center of one pin to the center of the next.
I hope this helps,
QuickTrax
Alot of the time if the tracks are (s+l) you can have dry pins from seal letting oil leak undetected.So when you go to turn the pins and bushing it can get expensive too do if you want to go back too (s+l) turn because you have too replace the bad pins and bushing.So the bennfit of the turn is lost.

1. I also had an undercarriage guy tell me that turning pins and bushings on small machines is not worth the expense. That the rail will not last as long as the turned pins and bushings. I get about 3,700 to 4,000 hours on D3 rail and have not turned pins and bushings up to this point.