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Anybody ever taken the washers out of their PFS?

Discussion in 'Shooting Related Threads' started by skeet_man, Aug 19, 2012.

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  1. skeet_man

    skeet_man Well-Known Member

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    Anybody ever completely disassembled their PFS? I shot in heavy rain 2 weeks ago, and I still have water oozing out of my PFS. I think I got most of it out with an air compressor just now, but I wouldn't mind taking it apart, cleaning the inside and all the washers, restacking the washers, and reassembling (I've been shooting it with absolutely no maintenance for 6 years now). I know if you turn the lock screw out far enough, the washers will come out all on their own, hopefully someone has a game plan on how to do this without ending up with a face full of washers, and a sequence for restacking them.
     
  2. j2jake

    j2jake Well-Known Member

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    I watched Vern do it, better call him first. Jake
     
  3. hunter44

    hunter44 Well-Known Member

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    Yes, do call Vern first. I think he said once that it is a difficult to impossible job to reinsert them if you take them out.
     
  4. skeet_man

    skeet_man Well-Known Member

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    Did it seem overly complicated? I'm pretty mechanically inclined (I've torn my kolar down more times than I care to remember to the very last part where it would not have been possible to disassemble anything more). I did that w/ no manual or instruction, and put it back together w/ no extra pieces LOL, so I would think a PFS would be a cakewalk in comparison :)
     
  5. zinger

    zinger Member

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    Ian, it's not recommended. There's 540+ spring washers in the stock and you'll never get them back in there. Send it to Vern and let him fix it.
     
  6. BL350

    BL350 TS Member

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    Dear SKM,
    Sure, you can take it apart!! Go right ahead! But if your not sure of the sequence and stacking order of these belville washers.....you will not get it right and you had better plan on two hours minimum for the stack time unless you have a fixture! Tryed to fix one for a friend...ended up sending it back to Vern @ PFS. After a technical discussion with Vern, will not take another one apart!! Truly a great recoil reduction device that is not effected by temperature change. Kudos and much more for a great product and company!..................Respectfully submitted....X-Jet Boat Bill
     
  7. 12 Gage

    12 Gage Member

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    To Restack the washers; get a long rod that will fit thru the centre of the washers, stack the washers on the rod three concave together then three convex washers, repeat this until you have all 540 washers or 180 sets of three assembled, then holding the washers assembled on the rod insert these into the cylinder. drop the cylinder over the rod. It can be done, a rocket scientist isnot required.
     
  8. 12 Gage

    12 Gage Member

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    It can be done, not rocket science, get a rod that will fit thru the centre of the washers about 12-14 inches long, tape the bottom so that the washers cannot fall off, stack the washers 3 convex then 3 concave on top of each other until all 540 or 180 sets of three have been installed in the rod. place the cylinder over the stacked washers on the shaft, turn over then remove the rod, washers are now into the cylinder, put the adjuster screw in and adjust and you are done. Make sure to install the lock nut after you have completed your adjustment.

    Gord
     
  9. skeet_man

    skeet_man Well-Known Member

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    Wow, not rocket science at all.

    Decided to role the dice crossed my fingers, and gave it a try. I'm never one to leave good enough alone (even though I need the stock for the state shoot in another 5 days LOL).

    I backed the tension screw out slowly. I wanted to back it out just enough to completely clear the threads, to determine if there was any standing tension against it, indicating stuff would fly out when I removed it. There was none. Once it cleared the threads, the screw just sat there. Slid it out, along with the long rod attached to it, and the washers just sat there.

    I have a rod of appropriate diameter, but not length, so I'll procure one tomorrow. I don't want to just dump the washers out, I want to slide them out on the rod so I can note the orientation and stack design. Once i have that noted, I'll toss them all in the ultrasonic for a go, clean out the tube, and put everything back together.

    I was a little scared, but as far as I can tell, there's nothing to it. It does look like there's quite a bit of water inside still (it was a DOWNPOUR I was shooting in).

    I'll post back w/ my results tomorrow, fingers crossed, everything goes smoothly. I figure you can never really get in too much trouble if you put things back together exactly as they came apart (famous last words right?).
     
  10. Rich219

    Rich219 Active Member

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    Ian,

    What ultrasonic unit do you use? I was thinking about picking one up.
     
  11. larrystrollo

    larrystrollo Member

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    A pic of the washers stack properly would be awesome.
     
  12. skeet_man

    skeet_man Well-Known Member

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    Rich- Its just a cheapie from Harbor Freight. Not as good as some of the high $ units, but perfectly adequate for what I need it for.

    http://www.harborfreight.com/25-liter-ultrasonic-cleaner-95563.html

    Interestingly, Lyman sells EXACTLY the same cleaner, but with their name on it, for significantly more money.

    http://www.lymanproducts.com/lyman/case-prep/turbosonic-casecleaner.php

    Larry- I'll do my best to take a pic when I have everything apart.
     
  13. Johnny

    Johnny Well-Known Member

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    Aren't those washers stainless?

    From the website:

    Unaffected by weather, e.g. heat, cold, moisture, etc.
    No maintenance required
    No Oiling required
     
  14. skeet_man

    skeet_man Well-Known Member

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    Although they are stainless, that doesn't mean they can't get wet and gummed up (they had kinda a funky smell when I pulled that tension screw). Unfortunately its not a perfectly sealed system like a hydraulic piston would be, otherwise the water wouldn't have gotten in there in the first place.

    I know, its probably overkill and unnecessary, but as I said, its been 6 years since the washers have seen the light of day, and the stock has been shot in all conditions, so I think it deserves a thorough cleaning and its probably time to restack the washers anyways. Plus I'm not excited about it oozing water for the past 2 weeks, the PFS might not be able to rust, but my gun sure can.

    Plus, I'm always interested to learn how things work, that way its not learning on the fly when I NEED to know how things work.
     
  15. sturgeon

    sturgeon Member

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    12Gage....You are quite right it is not difficult at all, I have done several without any problems. If you strip a PFS completely you may encounter temporary difficulties with the adhesives they use. Carefully applied heat works but be very careful. The downside seems to be the cost of Bellevilles if they need replacing.
    At the risk of irritating the manufacturer, the modern PFS is a poor copy of the original IMHO. The top 'bearing' continues to be an absolute disgrace(American Engineering usually excellent ++) but VDT has a cure. So have I ...Google Igus bearings .SteveB
     
  16. SMOKEIT

    SMOKEIT Well-Known Member

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    DON'T EVEN THINK ABOUT DOING IT YOURSELF. HAD A FRIEND THAT TRIED IT--WHAT A MESS...SMOKIT
     
  17. straightshooter1

    straightshooter1 Well-Known Member TS Supporters

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    I took mine apart. Not on purpose, it broke when shooting. Funny feeling with the recoil, looked down and I have a zillion washers on me and on the ground.

    But, as noted above, nothing money couldn't fix.

    Best of luck.

    Just a thought, call Vern and talk with him about it. He's very nice and would probably counsel against it, or offer some advice if you are determined to do it.

    Bob
     
  18. W.P.T.

    W.P.T. TS Member

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    I sold a used Golf cart to a guy who loves to tinker according to his wife, I'm not sure the thing ever ran again after he got it home ... He called and told me it was my fault and he wanted his money back, I asked if he was serious and hung up on him never to hear from him again ... WPT ... (YAC) ...
     
  19. skeet_man

    skeet_man Well-Known Member

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    Got it all apart, and the bellevilles are washing in the ulrasonic. I count 546 washers (90 stacks of 6, and a stack of 3 on each end). Dumped them loose into the ultrasonic w/ mineral spirits, then I'll dry them off and dump them in a jar of acetone for a couple seconds to remove any residue. I'm sure I have a task ahead of me restacking them, but once you know the order, a 3 year old could do it. They were super grimy when I got them out (the mineral spirits in my ultrasonic were almost clear when I started, now they are almost so black I can't see the bottom). I used a 3/16" steel rod to slide them out on, 12" long that I got from Tractor Supply.

    They are stacked in groups of 3. First stack from either end points inward, then the next outward, then the next inward and so on (hope that makes sense).

    For a visual it goes: > > > < < < > > >

    IDK if my stock differs any from the other ones, but I really don't see how you can get in ANY trouble doing this if you take your time and don't just dump the bellevilles out without noting the orientation (although I could do that now that I know how they stack).
     
  20. skeet_man

    skeet_man Well-Known Member

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    BTW, bellevilles are not stainless. They are black in color, are easily attracted by a magnet, and a few of them show some rust color on them (probably the only reason they didn't rust worst was b/c of w/e oil was on them and the accumulated grime.

    Put them all on a cookie tray in the oven on warm to make sure they're completely dry, then I'll start restacking them.
     
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