Ego trouble - solenoid?

[bulldog2k]

OK, my ego does not go bang

I've had this trouble before - the bolt cycles, but does not (or at least, erratically) goes bang properly - it still won't chrono above about 140ish

I can minimise the effects by setting Dwell to 14.9, but it's still not great

There is clear wear down the inside of the rammer tube in a thin straight line where the anno has worn off in a straight line by the motion of the rammer (not good, obviously) in one particular area

I have tried swapping bits with a friend's ego;

Battery
HPR
LPR
Rammer

and in all cases his works fine and mine doesn't

The only things I can think of left to sort are the noid and the valve (and the vavle looks in great condition (I don't know how to check the valve bushing itself for condition? It looks ok)

Is the noid user-servicable? I don't want to start stripping it and find I can't rebuild it.

Or can someone else suggest something else? (have dwell at 9.5 normally, stock bolt wthout o-rings)

 

[ollgeeze]

have you tried a new QEV on the back end of the ram? Could it be that the ram forward pressure coming from the noid is leaking through a faulty QEV? kinda grabbing at straws here :]

 

[robof9]

the noid is servicable to a certain extent, you can lube the spool, also you can buy a new one(spool) from planet.

if it doesnt leak i dont think it is that, try the noid on your friends ego, see if his works.

olly may be correct, qev, strip and relube or buy another.

you can check your valve, make sure it doesnt leak down the barrel, check spring pressure, no air

also check your lpr is good, you may have too low pressure.

other than this, check with planet they are great, nicky t will sort ya

 

[bulldog2k]

Thanks guys.

This is going to Planet and I'm going to go into smug mode about Ions being reliable.

Cleaned QEV as best I could, now it won't even cycle at 14.9 ms dwell. LPR is ok or at least was on mate's uzi, and his still did the same on mine. I can't now see how it's anything other than the noid, but I have been wrong before (once, back in '87)

One thing, when I took the QEV's off the rammer housing and blew down the back hole, it would push the rammer forwards, and once it was fully forwards would leak out of the front hole. Surely this can't be right? But I can't think it's relevant either because the rammer isn't even cycling at the moment...

Bollockchops

 

[jahlad]

sounds to me like you have something somewhere restricting air flow.....junk in the qev would cause that, also it would be worth stripping and cleaning the noid as per the manual,
what have you been lubing it with?

 

[Mario]

sounds to me like you have something somewhere restricting air flow.....junk in the qev would cause that, also it would be worth stripping and cleaning the noid as per the manual,
what have you been lubing it with?

exactly my thoughts...

 

[ollgeeze]

One thing, when I took the QEV's off the rammer housing and blew down the back hole, it would push the rammer forwards, and once it was fully forwards would leak out of the front hole.
Bollockchops

that cant be right dude, i dont see how that can happen if there are orings on the rammer, how much air leaks out? can you quite freely blow through it or is it a restricted flow once the rammer reaches the forward position? you mentioned a scratch down the inside of your rammer housing, is it a bad one? you may need a new rammer housing, but it seems strange to me that a rammer housing can become damaged to such an extent

or that might be normal, it could be something to do with how the rammer works, so that once the rammer gets far enough forward to have opened the valve sufficiently it vents air through the front QEV?? but then wouldnt you get the back pulse also holding the rammer forward if it went past the front qev?? i dunno, i need to find out how an ego rammer works :]

 

[bulldog2k]

sounds to me like you have something somewhere restricting air flow.....junk in the qev would cause that, also it would be worth stripping and cleaning the noid as per the manual,
what have you been lubing it with?

I'll try the noid stripping tonight, but I don't think there's anything about it in my manual? Or am I making that up?

Have been using Dow 33 on the regs and PMI synthetic gun oil on the rammer, o-rings, etc

Ollgeeze - believe me, that's exactly how it is. Like you, I guess I've come to assume that at the point the rammer is furthest forwards, the noid puts air through BOTH hoses? Who knows...

 

[bulldog2k]

Ok, my ego now goes bang...

...and accordingly many thanks to all who posted ideas

I cleaned the noid, though there seemed to be little wrong with it other than no visible lube (not that that was necessarily a concern)

On 'cleaning' (I still can't dismantle them - the front disc is wedged firmly tight, though I can with my other Ion-type QEV's) the front QEV, it seemed pretty gunked, and when I reassembled it, it shot fine...

...for 20 shots, then I had the same problem. I've upped the dwell to 9.5 - that's still a bit sketchy, then to 10.5 and it seems ok (though I haven't chrono'd it yet)

10.5 seems excessively high. The LPR is one turn in, which I guess necessitates a higher dwell, but not that high?

Anyway, my gut feeling is I should replace the QEVs but I'm reluctant to do this until I know exactly why they were gunked? Maybe I over-lubed the HPR? (but I didn't put that much on it - well, certainly not more than I would ever put on any other reg) Or maybe it's just the general accumulation of general debris over time?

 

[jahlad]

definatly sounds like the qev to me now........best bet is to get a new one on there and it should fix it permanantly

when we build them we use vaseline to lube the reg, nice and cheap and does the job perfectly. no need for any expencive grease. it is possible that something has worked its way along the low pressure hose and got stick in the qev, a build up over time is possible. there is a small rubber 'thingy' (for want of a better word) in the qev which will stick rather than move if there is junk in there.

a new qev or send it in for a service would be my advise