My Autococker Blows

[Cerberus]

I was cleaning my stock 2002 yesterday, while doing so I removed the 45 frame, after putting the thing back together I tried the bog paper test and it got blasted into the air.
Last time I tried it the paper moved up and down (well, more up), of course it could have got caught on the bolt.

As I understand this is bad, i'm going to test fire it today. Still does anyone have any advice (I've got all the ravi and vantrepes stuff) or better yet does any one know of a cocker tech in the notts/derby area.

I'll be going up to elsham for the training day on march 3rd to try out for trigger happy, so if anyone there is prepared to help?

 

[Simon Malone]

If your unsure ask the guys at Planet. They've helped me in the past

 

[Walker (Nitro)]

bet the bolts upside down

 

[MarkehB]

The bog paper test? I take it from the above you cover the feed with bog paper to see if its pushing air up there which might affect the feed of the balls?

If so reckon Walker is right too Test firing could get messy

 

[Cerberus]

Well I just did a test fire.
140 rounds and it fired just fine single shots, quick bursts and sustained not a problem.
Frankly I couldn't believe how accurate it was, even with the vicious crosswind on my garden.
The only prob I had was some inconsitancies with the feed, this could be from the blowing problem or from the fact that it's a right feed cocker.
Still I'll phone planet and talk to some ppl at elsham see if i can't sort it out.

BTW is it actually possible for someone to manage not to work out which way up the bolt goes?

while I'm here, can any one recommend a good (ie accurate), resonably priced (not a freak set) barrel that'll fit diablo and possibly zap.

 

[Walker (Nitro)]

1) make sure the hole in the blt points down

2) get a JJ barrel, 1/2 price boomstick just as accurate, and it is interchangeable

I accept VISA for my help, no sexual favours please

Chris

 

[steve_e]

Firstly make sure the 'o' rings on the bolt aren't damaged. Give them a soak in oil this makes them expand a bit.

Just because it appears to be shooting normally doesn't mean it is, you really need a chrono to check, as they could be a +/- 30fps and you won't notice it with you eyes, but it would shoot straight.

The best check for extreme blow back is to chamber a ball, then put another on the bolt (no hopper) and fire it if the ball shoots out of the the feed tube then you've most likely got knackered 'o' rings on the bolt.

Feed inconsistancies are bad on any cocker, just because its a right feed doesn't make any difference to how it feeds.

Just taking the Grip frame off and replacing it shouldn't of made any difference to the timing (which would affect blowback), easy way to check the timing is, pull the trigger to cock it, then slowly pull the trigger and note when the gun fires and when the backblock starts moving.

This will depend on the type of trigger plate you have, being a 2002 stock i'd take it would be a slotless trigger?? On a slotless trigger the timing should be pretty close, i.e. the gun should fire then you move the trigger slight further and the back block will start to move and complete before end of the trigger pull.

If the bolt is beginning to move just before or when it fires then then could be causing the blowback!

Hope that helps!!

 

[Cerberus]

Tried that test and the ball did jump out of the feed. The o rings don't apppear to be damaged, but i'll change them anyway as I've just learnt that vasaline eats at them (bloody users manual)

As best as I can tell it's firing at practicly the same time as the bolt starts to go back, also when I put my hand over the feed the blowback feels very much like it's rushing back from arond the bolt.

Thanks

so it does indeed look like the timing.
any tips on precisly what I should adjust and how? I don't fancy
just twidling around with the block and pump rod completly blind.

might sound a bit of a no brainer but that would be the JJ full tilt, yes?

 

[KillerOnion]

First step to accomplishing what you want in terms of getting the timing right is to adjust the release of the sear so that it releases a little sooner in the pull than what it is now. You can raise the sear lug a tad by sticking an allen wrench in through the hole in the top (after having taken the bolt out first!), and turning it to the left...start small, say about a quarter turn or so. This will remedy it somewhat, if not fix it entirely, but be sparing in how you do this because too much letting it up will have it not catch at all, and no firing will happen at all! If you can accomplish getting the firing point soon enough, do only this. Otherwise, next back the actuator (3way) rod out a little bit at a time to give it a little slack, making the pull of the 3way start a little later in the pull. You can only do so much of that, so if that isn't enough then you might want to switch to a SLIGHTLY softer sear spring, which allows it to uncatch a little easier again.

Take these steps in precise order of occurance, and each in moderation. Your cocker should work by doing these things. If not, ask here again or consult a higher authority, if there is one.

 

[steve_e]

As KillerO says. .. .cheers buddy saved me typing that out!