FX What causes regulator to be same pressure as the rest of the air tube?
- Thread starter jem91
- Start date
This "current breed" FX owner found the AMP regulator in his "current" FX Bobcat had been thread locked by FX. So disassembly required application of a lot of heat. Then when his "current" Boss had issues rather than struggle with the thread lock bought 3 huma regulator and eventually replaced the AMP in all 3 FX.
The Huma is more easily adjusted with the pressure clearly marked on the body. There has been zero noticable creep on any of the 3 Huma regulator.
The Huma is more easily adjusted with the pressure clearly marked on the body. There has been zero noticable creep on any of the 3 Huma regulator.
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Yes, and this is why I noted that on air tube type guns like your bobcat I favor the Huma regs. I have Huma regs in both my wildcat MK2’s and on my Benjamin marauder, but on my wildcat mk3 “bottle” gun, my crown, and both my mk2 impacts I stick with the fx amp reg.
Just an fyi, on my wildcat MK2’s and almost every Huma reg I’ve installed on other people’s air tube type guns, that bar indicator label was off. I use a Huma reg tester tool to verify correct bar settings instead. The person that taught me how to work on fx guns told me to just remove the paper labels that Huma puts on their air tube type regs because some of the times they are off.
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Back to the OP’s dilemma about reg pressures matching up to fill pressures, when pulling out an amp reg for a reseal(I’m going to assume the fault is due to o ring failure and not piston seal. With piston seal failure most of the time what you’ll get is reg creep in a bad way)
make sure to change out all the regs o rings- that’s the one outside the main reg body, one inside the reg body, the one on the base of the piston, the two on the adjustment screw, and lastly, the one inside the reg tunnel. I blame this particular one the most when reg pressure matches fill pressure based on my experiences. If air seeps past that seal it bypasses the insides of the reg so it’s basically like not having a reg installed anyway. This o ring tends to dry up crispy like, and gets glued into the o ring groove, making removal a good test of your patience.
make sure to change out all the regs o rings- that’s the one outside the main reg body, one inside the reg body, the one on the base of the piston, the two on the adjustment screw, and lastly, the one inside the reg tunnel. I blame this particular one the most when reg pressure matches fill pressure based on my experiences. If air seeps past that seal it bypasses the insides of the reg so it’s basically like not having a reg installed anyway. This o ring tends to dry up crispy like, and gets glued into the o ring groove, making removal a good test of your patience.
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Tube or bottle is irrelevant, thread locker is relevant.
The markings get you close. Zero markings on the AMP. You have to write down how many turns when you disassemble.
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Hi jem91. As I said in my previous post (post number 19), the problem is that the O-ring on the set screw nearest to the piston needs to be replaced. Here is a thread that has a picture in the 1st post. In the picture you will see a set screw O-ring that has a red asterisk next to it. THAT is EXACTLY the O-ring that is damaged and is allowing air from your tank to go directly into your plenum. You need to replace that O-ring, but you should replace both of the set screw O-rings while you're at it. I see no reason to replace any other regulator O-rings unless air is leaking (you'd know if it was leaking because your tank pressure would drop significantly overnight or over the course of several days). I see no reason to buy a new regulator -- O-rings just need to be replaced sometimes.
FX AMP Regulator - Dreamline Bottle
Newman's video (910 Airgun Tuning & Repairs) on the AMP reg is really great. But it's fast. I usually need to put things on paper to memorize them. So, here is what I've just put together. Let me know if you see something that does not make sense. PDF attached, so if you want to print it...
www.airgunnation.com stovepipe
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I was mainly worried if the high regulator pressure would cause any damage but seems to be a common thing with time and use, Its an earlier model so those seem to have a few extra issues in general and some parts were updated later.
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