Username:

Password:

Author Topic: bulk fill c02 repair  (Read 183 times)

Offline Dvlnme

  • Sr. Member
  • ****
  • Posts: 332
  • Mana 5
    • View Profile
bulk fill c02 repair
« on: October 04, 2018, 07:31:19 AM »
its been bit qiuet on here lately,guess everyone busy on other things,didnt take ant pics when doing this,but
 there pics this bulk fill unit on modification thread somewhere a while back,the screw in bulk fill unit i made
 for my old gamo G1200 co2 pump/slide action rifle developed a slow leak recently thru the fill valve so
 decided to have look at it,figured was proberly some dirt etc got into valve thru foster male fitting as rifle
 been sitting in workshop without cap on fill fitting,easy job,just had unscrew foster fitting and remove valve
 sure nuf bit crap in there,tiny bit brass that mustve come from mill had got under valve seat n stuck in the
 synthetic seal inside foster fitting,easy fix just replaced seal,filled unit to 1100 psi with hpa to test for leaks
 n left over nite, i allways do these pressure tests on co2 with hpa,as air thinner than co2,so more likely to
 find ant leaks than co2,no leaks next day so all good,as unit allready got 1100 psi hpa in it and been
 thinking trying this rifle on regulated hpa,decided this good time to see if gun would evan fuction on hpa,
 set up chrono and this is what i got from 10 shot string,bear in mind this unit small only holds 36 grams
 co2,havnt checked how many cc it holds but not a lot,580.0/591.4/574.4/571.1/570.5/545.8/550.8/538.6/535.4/531.6 fps average558.9 ,co2 normally
 gives 535fps.looks like hpa guna be good option it reg set to approx 950/1000 would be well worth
 new hpa unit to hold more hpa and run at approx 3000 psi fills off reg as accuracy evan with 48.5 fps
 variation in velocity over 10 shot string was equal to that on co2 and shot pretty much to same point aim
 can see a new hpa project coming out this test.
 cheers mike

Offline Dvlnme

  • Sr. Member
  • ****
  • Posts: 332
  • Mana 5
    • View Profile
Re: bulk fill c02 repair
« Reply #1 on: October 05, 2018, 07:48:19 PM »
since this new valve worked out so well,its new design i came up with,i thought would make another for
 one the bulk fill cylanders i made eary on for the gamo co2 extreme rifle i allso have made this cylander
 up years ago,before i changed to fitting fill valves into the neck of cylanders and fill valve never quite did
 work as well it couldve,well new valve worked just fine,but for some reason,dispite all new tube seals the
 damned thing had a leak around front tube seals it never had before ,tiny leak but enuf to deplete 1200
 psi hpa out cylander over nite,prob wont have leaked with co2 etc,but anoyed the hell outa me coz nothing
 i tryed managed to stop it,drove me mad for few hours til realised silly bugger hadnt replaced the
 synthetic washer under the foster fill fitting which just happens to be the same diameter as the tube,so
 made leak look like was coming out around tube seals,must be getting old shouldve picked that one up
 right awy eh!!! durrrrr.
 a new washer n sweetas now.
 cheers mike

Offline Dvlnme

  • Sr. Member
  • ****
  • Posts: 332
  • Mana 5
    • View Profile
Re: bulk fill c02 repair
« Reply #2 on: October 08, 2018, 08:38:51 PM »
the bulk fill cylander passed its 24 hour 3000psi test so all good now,made up a new test cylander today
 want try new idea for a ball bearing one way fill valve i came up with,very simple n easy to make,so hope
 will work out,only for co2 use on screw in bulk fill units i make up for 2240s that bassically just extend the
 factory tube to hold approx 24 grams co2 to get shot count up a little more on guns with modded valves
 coz am a tight ass when comes to buying 12gr disposalable n only getting 12/16 shots for my $1, and bulk
 filling costs me nuthn for co2.
 cheers mike