Can anyone tell me how to take apart a TT door latch assembly? I soaked it in Evaporust, which did a fantastic job, but I need to take it apart further to replace the latch return spring.
So, it is tack-welded together? I don't see typical rivets that can be drilled out. Also, does anyone have a source for the tension spring?
Lang's has a rebuild kit for these. Check how they are held together and separate attaching points,spot weld back together.
This older post on TT closed cab latch may give some insight on how its done.
I'm not sure what the differences are between TT latches and those on the car bodies, the ones I've worked on were held together with tabs on one piece that were peened over slots in the mating piece. Careful filing parallel to the tab allows disassembly, and often there's still enough material to allow the tabs to be peened once again on re-assembly. I'd be surprised if TT latches are 'way different from those used on cars. Please DON'T spot-weld them to re-assemble ! If necessary, build up the tabs. You never know when the latch might need another repair sometime in the next century !!
Here's the lock after an evaporust bath. Looks great, but the tension spring is shot.
From here, I can see what looks like six spot welds in the second picture. I'd drill them out and see what happens, I'll bet(but not much!) it comes apart. No other means for attaching the two haves, would about have to be spot welded I would think. I'd just drill deep enough to go through the first layer. That way, it can be plug welded easily. JMHO Dave
And, the plug welds can be drilled out if need be in the future.
And, the plug welds can be drilled out if need be in the future. Or, tack weld the edges, they could be cut with a dremel.
Yup. Looks like spot-welds, drilling is a good way to disassemble. Shot off my mouth, these are very different from the latches I've worked on.
I've got to say, however, I love how well Evaporust works! No stink, no big cleanup, and safe for bare hands (though they will stain you a bit yellow from the rust).
Here's what's inside the lock