Poseidon8118
Contributor
WarmWaterDiver:I think Scuba-J has a point here. Our 1999 models show Buna-N in the 'stock' first stage parts list - so I imagine an older model likely has similar components, and I doubt it has Christolube - it certainly wouldn't hurt anything for it to have a good cleaning, current Sherwood EAN compatible elastomers, and Christolube installed when you have it serviced.
Let us know what your service tech has to say after you take it in.
Page 5 in the SRB3600 parts manual states enriched air conversion kit is: 4000-4N as stated before. I posted the link to the manuals above. Caveman have your tech confirm the 4000-4N kit as well as christolube so it's up to Nitrox specs...