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240SX 03-12-2013 08:11 PM

Newly built CCM Pump is leaking
I'm hoping this is a simple fix and I'm just having a brain fart. I'm just finishing off my Completely CCM built Orracle pump and I've run into a snag. Here's my list of parts to start...

Orracle Body
Check it Detent (Thanks Broch)
CCM bolt and pin
CCM 45 Frame
CCM Lower Internals
CCM Mini Drop
CCM Regulator
CCM Feedneck
CCM Beaver Tail
CCM Cocking Rod
CCM Air Fittings

So I have it all assembled and it leaks down the barrel until I pump it. When I take a shot it leaks hard down the barrel again until I pump it which then stops the leak. I have taken several shots in a row and actually had it not leak after shooting once or twice but that is very rare. Any ideas what could be causing this issue?

Dave Cameron 03-12-2013 08:16 PM

Weak/broken/misaligned valve spring?

crazyorigin 03-12-2013 08:21 PM

What springs are in it and does it shoot at a usable velocity? Sounds to me like your main sprong is too weak and isnt seating the valve consistently or properly.

240SX 03-12-2013 08:21 PM

The internals are brand new. I'll take it apart to make sure its all lined up.

BLachance75 03-12-2013 08:22 PM

I agree with Dave, also check the oring on the valve stem and valve body and make sure the jam nut is tight

crazyorigin 03-12-2013 08:22 PM

Make sure not to tighten the set screw for the valve too tight, it just needs to be snugged down. I have over tightened them before and it can jam the valve pin up in the valve body.

240SX 03-12-2013 08:23 PM

I just did a search and came across a thread on another site which shall remain nameless, there issue turned out to be the IVG was turned in too far. I'll give that a shot.

Mar 03-12-2013 08:31 PM

IMO: it is the reg. There is not enough pressure behind the valve pin to keep a seal v/ the hammer weight and mainspring.

Try increasing the pressure on your reg slightly.

240SX 03-12-2013 08:32 PM

Do the CCM regs come set at an appropriate pressure from the shop?

BLachance75 03-12-2013 08:33 PM

Good point by Mar, what is the reg pressure. Try something in the 350psi range and set the IVG to 2-3 turns in from flush.

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