LMTV FMTV replacement or upgrade air dryers

I posted this picture on another related thread where a guy found a similar piece in his air dryer.

I made it to Tulsa Ok today and started loosing air. I pulled over and noticed the new air dryer I just replaced in Johnson City TN was consistently purging air. I barely made it back to Tulsa without being able to touch the brake as the pressure was down to 80 PSI. Just as I pulled into the parking lot of the mechanics the emergency brakes locked up. We pulled the purge valve filter off the top and there was a little oil in it and some other tiny debris along with one of the three pieces in the photo. We fished that out and then pulled the purge valve off and two more pieces fell out. One of the pieces was stuck in the valve not allowing it to seat. The are the same pieces as in the OP’s picture above. What are they coming from? What is coming apart? Could these have come from the compresso?

Compressor ex valve spring dissentigrated?

Ronmar said:

Compressor ex valve spring dissentigrated?

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Yup. I said it before and I'll say it again - there's two types of FMTV owners - those with broken air compressor exhaust valve springs that know about it, and those with broken exhaust valve springs that they don't yet know about. They exist in no other possible configuration until and unless the head has been rebuilt or replaced.

I'm convinced that broken exhaust valve springs were a factory feature on our air compressors. I think the government paid extra for it. Very nice of them

I think perhaps running the engine at max governed down the highway probably has something to do with it also

GeneralDisorder said:

Yup. I said it before and I'll say it again - there's two types of FMTV owners - those with broken air compressor exhaust valve springs that know about it, and those with broken exhaust valve springs that they don't yet know about.

Click to expand...

So when I replaced my compressor with a new one, which group am I still in?

Until and unless the head has been replaced*

So you're good!