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Old 12-22-2010, 07:46 PM   #21 (permalink)
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Originally Posted by randyshipp View Post
I'm more confused than ever now. I powered and gassed it up. There's a little leak in one of the microline fittings, but that can probably be fixed easily enough. At first, it didn't cycle fully -- just a ka-chick! and a little gas exhausted -- but then it started firing, though it missed a couple in a the middle of a string of shots. When I last put it away, I don't think it was firing at all.

So, do you think just a strip, clean, and lube is the first step?


Randy...
I watched the video, but couldn't see anything; video was so dark... From what you described above, it is short stroking, either not latching the hammer or not striking the sear pin. I know you have taken it apart already but, the best way to figure out what the gun is doing is to remove the trigger frame from the body and then gas up and cycle the gun. In this way, you can see the hammer and carrier moving. You will be able to see if they are latching and releasing properly.

If the carrier is latching the hammer but not striking the sear pin then, the gun is cycling too slow. If the carrier is not latching the hammer, then the hammer is worn out or the pressure is not high enough or the valve spring is worn out...

And about oil...do not use 3 in 1 oil. It is petrolium based and will eat the o-rings; especially in the MAC valve. Use a light synthetic clear gun oil. For the internals, Radio Shack sells a Teflon grease that is great; cannot remember the name at the moment.
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Last edited by Mad Marty; 12-22-2010 at 07:52 PM.
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Old 12-22-2010, 09:30 PM   #22 (permalink)
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Marty,

Do you have a list of the mods and prices? Thanks.

Randy...
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Old 12-22-2010, 09:58 PM   #23 (permalink)
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Old 12-22-2010, 11:02 PM   #24 (permalink)
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Well, I'm probably giving up on getting the valve out at this time. That set screw is flat out frozen. I've tried wrenching it, I've tried tapping on the Allen wrench to try to free it, and I've had PB Blaster sitting on it for several hours now, and it still feels like a contest between the socket in the head of the screw and the shaft of the Allen wrench as to which one will fail first. There's certainly no evidence that the screw is going to turn. So, I'll clean and lube everything else, and we'll see if there's improvement. If that valve's going to need to come out, then I might have to enlist outside help.

Randy...
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Old 12-22-2010, 11:59 PM   #25 (permalink)
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Is it normal to be able to turn the ram after the pinch bolt is tightened? I don't remember that before. Or do you REALLY crank down on that pinch bolt?

Randy...
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Old 12-23-2010, 11:21 PM   #26 (permalink)
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The ram is just loose in the ring; no worries. Just hand tighten with some loctite. I no longer have the price list of mods that I could do. No one has wanted them for years. Even though my prices are low enough, beyond a certain point you would be spending more than the gun is worth. The basic mods are $25, these are for the hammer and carrier.
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Old 02-28-2011, 07:38 PM   #27 (permalink)
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OK, after finally getting an HPA tank, I've managed to tinker a bit. With the grip frame off, I can see through the slot on the underside of the lower receiver and watch what happens as I cycle the gun. As we probably already knew, the carrier and bolt are only latching together some of the time. So, which of the following is the most likely next step?

- Adjust the ram-carrier linkage to lengthen it a bit?
- Do something with the LPR?
- Measure the valve spring to confirm whether it's shot or not?

I think visually inspecting the hammer and carrier, the edges look sharp enough that I think they're not failing to latch because of being worn and rounded off. So I think the carrier isn't going back far enough reliably.

If in fact it's the LPR, that's not a rebuildable piece, is it? At that point, do I need to look for something like the Sledgehammer someone mentioned?

Thanks for helping me on this fool's errand.
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Old 03-03-2011, 08:27 PM   #28 (permalink)
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I'd highly recommend getting Marty's Mods done. All my RM's have them and they're totally worth it. One of these days I'll send him my Vector's guts for the same.
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Old 03-04-2011, 10:10 PM   #29 (permalink)
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Yeah, definitely, but I think I should be able to get this cycling first. I don't feel like it's TOO far from that.
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Old 04-25-2011, 01:05 AM   #30 (permalink)
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Randy, whatever happened with your Rain Maker, get it working?
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