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-   -   Newly built CCM Pump is leaking (http://www.mcarterbrown.com/forums/ccm/228657-newly-built-ccm-pump-leaking.html)

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 On/Off ASA
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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