Tuning Maverick regulator dilemma solved!

History.

After learning much about regulators concerning my Impact MKI upgraded to an MKII having Huma replacements. That is in and of itself a BIG story…And it gets bigger with the MKII gen3. I’ll leave it at that.

Dreamline AMP is simple and easy as is the Wildcat MK3, pretty much the same.

Now let’s get to the point of my .22 Maverick Sniper.

My testing/tuning the Maverick is in my HUGE 5 yard (yes, 5 yards, don’t laugh) shop. It works, kinda, and that is another story.

Discovery time!

Baseline gauges are as follow. New replacement Wika Reg #1 gauge. Replaced the #2 reg gauge with a Sekhmet digital (awesome!).

I was never able to get the Maverick to recharge the #2 reg/ plenum faster than 3-4 minutes to 130bar from my tune of 160/130. Steve of AEAC in his video showing the same tune recharged to 130bar in 3 seconds!!! I contacted him and he agreed, something was wrong and he suggested I contact FX USA. Done.

In the meantime a friend who has an M3 and had an extra reg rebuild kit from FX let me try it to see if it solved the problem. Well, it did, in an odd sort of way.

After opening up the second reg to “flush” to start the degassing, I see that my 1st reg is close to my current setting of 160bar, standing at 158bar. Good.

I now release all air and proceed to extract the second reg body (only after watching ER’s FX Masterclass on the Maverick) and what do I find but the #11 Bellville washer was installed backwards/upside-down!!! LMAO.

I was able to tune it, but not to the place I felt it could really preform. Frustrating.

I discovered this tonight and I’m heading to RMAC on Wednesday, so I will carry on with this and post my recharge times when I get home next week. A big Thanks to Steve-AEAC for his great work with the Maverick tunes and VLOG.

Patrick

20210823_202525.1629781332.jpg


20210823_203246.1629781352.jpg


20210823_205324.1629781372.jpg


20210823_210617.1629781391.jpg

 
Patrick, I hope you have the problem licked however I wanted to comment on the spring arrangement. The reversed Belleville on the end equates to having a nested (parallel) pair, which is essentially like having a shim in that location. Shimming is a normal practice for adjusting the setpoint of regulators which lack an adjustable seat. For example, virtually every Ninja regulator in existence is set up this way.

If the problem persists, check the narrow end of the piston. It needs to be dead flat and perfectly smooth. If it has any imperfections, scratches, or indentations, that will cause the pressure to climb slowly over a period of minutes or even hours.

If need be, it can be fixed by hand by wet sanding against a good flat surface like a granite countertop or a piece of glass. Start with 600 grit and work it until it is flat, then move to 1200 and 2000 or thereabout. If the flattening step is taking too long with 600, you may want to step back to 400 but I wouldn't go any coarser than that.
 
nervoustrig, Thank you very much for explaining how these Belleville's work in these designs and compared to the Ninja, which I have no experience with. My re-stacking of the AMP Belleville's is only based on the supplied diagram from FX, the Ernest Rowe Maverick re-assembly video and the regulator video from Newman @ 910 Airgun. They each show the same stacking sequence and mine was different, looking like your description of a Ninja. I will look closely at the small end of the piston and correct any anomalist I detect as per your recommendation. I will report back when all is reassembled after RMAC. Thank you again.

Patrick

910 Airgun:

https://www.youtube.com/watch?v=TNPiYHiA4z0

AMP Reg.1629843007.jpg