I have an impact mk2. I need help to restack the washers. I have try looking YouTube. I see video from Utah airgun and ernest. But their video is mostly just talking and they do not show an diagram how each washer is stack. I do not know how it's stack by them talking and not showing a diagram.I do not see anyone except ernest talk about how each washer is different thickness. Does no one actually measure the washers? Cause I had 7 washers range from .44-46mm and 4 washers range from .55-57mm. Can anyone here tell me how they are stack? There are 11 total washers. Also mention where the thinner and thicker washers goes. Start from left will be the reg housing, right will be toward the plastic piston. Thanks
FX Fx impact amp reg. Washer stacking
- Thread starter 2fast2furious
- Start date
I just went through this to repair a Maverick. The factory AMP reg stack goes like this:
)()()()()() ==[]
Washers/Piston
)()()()()() ==[]
Washers/Piston
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Sub 12 airgunner on youtube shows you how to stack washer i think he said first is convex then concave then repeat
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Ok. So does the .4xmm goes in the middle and .5xmm on the outside? That's what I'm thinking.
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I had two MKll PP Impacts. My stacks looked like this. Orientation is related to your piston pic (() () () () ()
I never concerned myself with the thickness of each because I never got them out of order.
I never concerned myself with the thickness of each because I never got them out of order.
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The consensus of people much smarter than me is to keep the thickness paired together. If you mix and match thicknesses you can possibly get slight creep or inconsistent Bar between shots. Mr Rowe has said he likes to measure and keep the same thickness for the whole stack for his competition rigs. I dont think most people need to go that far but he did say his testing showed a difference when pairing thickness. The order of thickness probably wont matter, and really you may never even notice a Bar or five between shots.
As a side note, FX seems to not put the stacks together the same every time from the factory. My front reg was not able to go above about 130Bar with the stack like this: (()()()()() ==[]. If you want to change the working pressure range of your reg you can play around with the top 2 or 3 washers.
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Seem like only 1 person went with )()()()()() and the rest went with (()()()()() so I will stack mine (()()()()(). I guess thickness doesn't matter where they are place as long as same thickness are pair together. So that's what I will do.
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For most people (()()()()() vs )()()()()() wont really make a difference since the usable pressure range only becomes an issue when going with really high settings. And since there is so much variance in washer thickness and spring rates etc, each reg is different. The main thing I think is to make sure you have 11 washers and dont stack them (()(()()))(()( like a total lunatic lol.
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D
Deleted member 58109
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no they don't as I changed 4 of the Bellville washers today in my M4 they don't and also 3 different thickness
mine were 4 60mm 4 50mm and 3 48mm i swapped out the 50s to 54mm mc master had them.
what a difference when adjusting the numbers now go 1 2 3 gradual vs 1.5.9 jumpy
i also beveled the top and bottom inside and outside edges using a diamond bit took some time then polished.
both sides was definitely worth the time and effort recovery is like 5-7 seconds vs 10+
shot another string of 25 very consistent.
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I don't recommend using different thickness of washers, the reasoning is, the thinner ones will over work when compressed, the thicker the washer stack, the more pressure you can develop. Also nestling two washers makes the sum thicker, almost takes it out of the equation IMHO. Points of contact need to be polished a little and all washers need to be lubed with real lube, not silicon. Nothing bad will happen with a good grade synthetic. My shot cycle is in seconds as in 3.7 on both of my Mavs, .22 and .25. Now if you want something flat.... Ok, I'm cheating, it's my Raptor with the new improved valve, but my Mavs are pretty darn close. Note, these are 30 gr AEA slugs. YMMV with pellets or other projectiles. MY SD is best across the board with AEA pellets/slugs.
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it came with 3 different thicknesses but was a little rachety and recovery was like 10-14 sec
so, i bought a bunch of washers 10x 4.2 from 30 to 70 and measured with my mic and used matched sets swapped out the 50 to 54 thickness beveled and polished both sides.
it works mint recovery is 1/2 the time 5 - 7 seconds i did a 25-shot count from cold in 32 degrees out
here was the results
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