Probably not normal , last unit I had with those valves was 12 years ago so I can't check.
BUT: If they go back together and don't leak, I wouldn't get into a sweat about replacing them.
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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