New (to me) FX Royale 400 question

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bchannell

bchannell

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Nov 1, 2020
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Parkersburg, WV USA
I bought a 400 off an individual and it hadn't been shot in a couple years and when the seller was boxing it up he noticed it was empty. I've had more than a few airguns apart but was just wondering, while waiting for it to arrive, what are the likely leak points and do these rifles have any common leaks? From the drawing I looked at there are only a few orings that would cause this. The reg, the fill valve/ bottle adapter and the firing valve.
 
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Yep, that's about it. Mine has never leaked, but I've replaced the reg and had it apart a few times, and I think you will find it easy to service. If there is air in the plenum, just loosen the stock screw attachment housing to drain, which will save a little stress on the bottle adapter O ring. It is one of my favorite rifles (the only FX platform for me).
 
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You acquired a SUPERB & simple pellet shooting platform. I have a .22 Bobcat,.25 Royale 500 & a .30 Boss. Never any leaks with the Royale & Boss. If the prior owner ever had it apart without replacing seals, especially around regulator exterior, THAT could cause leaks. Remove stock from action & spray with some form of leak detector to track it down. FX USA has diagrams under "support" on their website. 20220430_141952.jpg
 
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Thanks for the encouragement guys. One of the things that drew me to the 400 is simplicity. I had been considering the Crown but I'm just not that interested in constantly tweeking. No offense to those who do, but I like to tune a rifle and leave it that way a shoot it. Just two different ways of plying with airguns tweaking and shooting, kinda cool FX has got it all covered.

The only previous FX I've had was a Cyclone, which my neighbor still Has, and it is a tank. He's beat the crap out of it and it never misses a beat. You should have seen his face when he shot it without the silencer and it cracked a fair bit, and he knew of course how quiet it normally is, and I opened up the silencer to show him it was empty! He's not a technology guy and he was amazed!
 
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I had to get into the internals of my Boss a couple months ago. I was surprised how relatively easy it was to work on & get it back to top form. Same as yours, just larger caliber.
BTW, I dressed up all 3 of mine with custom made aluminum knurled cocking lever handles made by Chan (cfs916). They feel GREAT & so was his price! Same as Crown or Impact handles if you contact him.
20230424_161058.jpg
 
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I have rebuilt several FX, its all was different sometime it the bottle valve, the regulator in the front, there is an o ring and 2 on top of it,the one on the inside you need to be very careful when taking the regulator apart, there are a lots of video out there on how to do them, I have seen some 22 not regulated
 
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Gerry52 said:
I had to get into the internals of my Boss a couple months ago. I was surprised how relatively easy it was to work on & get it back to top form. Same as yours, just larger caliber.
BTW, I dressed up all 3 of mine with custom made aluminum knurled cocking lever handles made by Chan (cfs916). They feel GREAT & so was his price! Same as Crown or Impact handles if you contact him. View attachment 354516
Click to expand...
Chan has since ramped up his game with these cocking handles. Beautiful work
07FD9174-17FF-4109-ACE1-AF8408895C5B.jpeg
 
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