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Old 08-14-2012, 01:00 PM #1
paintballer231
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MQ2 Pump Low Velocity Issue

Hey Guys ,I have a Series 6 CCM with MQ2 Valve that has issue obtaining velocity.Its equipped with a CP V1 Regulator (Flat Sides Bottom Input via a Straight Fitting) and powered by an E2 Board/Frame.

I reached 220 FPS before the relief valve started to leak bored matched with an iFit to 685.If I increased pressure ignoring the relief valve ,eventually the poppet would stick open and leak a little air down the barrel but this would go away if I reduced pressure back to where the relief valve would seal up.

Recently I replaced the noid pilot spring with a fresh unit.Research said the MQ1 and 2 Springs were the same ,sourced from CSC Stock # II-21
OD (in) 0.234
ID (in) 0.202
Free Length (in) 0.380
Rate (lbs/in) 3.600
Sugg. Max Defl. (in) 0.290
Sugg. Max Load (lbs) 1.000
Solid Length (in) 0.090
Wire Dia. (in) 0.016
Total Coils 4.500
Material Music Wire
Ends Closed
Finish Zinc

PS:I have 40 of the god damn things since that was the min #.If anyone wants some LMK and I will gladly ship some out for cost.

Son is 4
Fresh 9V
Pressure Before Leak 200 PSI
The poppit is lighty lubed with 33.
I'm running a DRG seal with a fresh poppet spring as well.]
Spacer Installed
Valve Body Seal and Setscrew are installed.
The Pilot seal was recently flipped

I also have an E1 Board I'm going to swap in to give me an increased SON Range but I see most pumps can run 4.0 with no issues.

I have a 2 Liter I can swap in as well ,I have a feeling I Just don't have enough post regulated air and by the looks of it the 2 Liter holds more post regulation.

My Other Theories
Poppet Lubrication Needed?
Noid Pilot Spring Wrong Weight? (Can someone confirm they are the same spring in the MQ1)
Valve Body Seal Not Sealing?

Feel free to Chime in as I have a week today to have it running.
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Old 08-14-2012, 03:45 PM #2
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you need reg pressure about 300 psi to get the right velocity
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Old 08-14-2012, 04:31 PM #3
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pull spacer, up pressure, try again, report results!
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Last edited by barrel roll : 08-14-2012 at 04:38 PM.
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Old 08-15-2012, 01:36 PM #4
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Fresh Dot Seal With Spacer ,Still Leaks
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Old 08-16-2012, 09:26 AM #5
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pulling the spacer, see how that works
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Old 08-17-2012, 06:47 PM #6
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Still Leaked and Now I need to Order Dots
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Old 08-20-2012, 08:42 AM #7
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I punched a bunch of dots last night.
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Old 09-05-2012, 09:10 AM #8
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Solve your problem?

What I also found that can cause this is the poppet seal at the front of the valve. Make sure the screw is not loose, but don't over torque it either.

Check the poppet seal itself as well. Make sure it is clean and not damaged. If it still leaks, I would replace it.

I would also make sure the air flow through the seal screw and poppet is not plugged up with dirt.

As for lube, I would be a bit more generous with it in the valve (not in the pilot housing). I make sure the poppet and spring is lubed.

Also check or replace the valve body o-rings.
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Old 09-17-2012, 04:48 AM #9
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Any luck?
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Old 10-17-2012, 03:27 PM #10
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Nothing so far.I have to fix the wiring and add a new pilot seal that was sent to me
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Old 10-17-2012, 03:31 PM #11
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Quote:
Originally Posted by mxmtl View Post
Solve your problem?

What I also found that can cause this is the poppet seal at the front of the valve. Make sure the screw is not loose, but don't over torque it either.

Check the poppet seal itself as well. Make sure it is clean and not damaged. If it still leaks, I would replace it.

I would also make sure the air flow through the seal screw and poppet is not plugged up with dirt.

As for lube, I would be a bit more generous with it in the valve (not in the pilot housing). I make sure the poppet and spring is lubed.

Also check or replace the valve body o-rings.
Your saying the poppet seal can cause low velocity/this issue?
The hole is clean and the seal is undamaged.The screw was given a dab of loctite when I first cleaned it .
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Old 12-16-2012, 09:05 PM #12
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Update:Spring with no spacer and fresh dot=leak at all pressures.

Spring with spacer (Same Dot)=200 PSI leak still.If I move the pilot with an allen key the leak seals at higher pressures .I tried turning the pressure up and holding it for 5+ minutes but no luck .

Spring with 2 spacers(different Dot)+(Metal Washer)+Original Spacer=Same Issue.

Can anyone confirm Century Spring Part II-21 is the correct spring for the pilot?

I have a Bin 5 noid FYI.
The bands on your case indicate this as well as the # on the noid.
Both mine match up so its not a mix and match.
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Old 12-17-2012, 01:27 PM #13
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i would love some of those springs how much for 5?
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Old 12-17-2012, 03:47 PM #14
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Quote:
Originally Posted by djxenex View Post
i would love some of those springs how much for 5?
$2/Spring+shipping (What I paid) as I have too many of them!
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Old 12-26-2012, 09:21 PM #15
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I need someone to confirm that Century Spring Part II-21 is the correct spring for the noid pilot.I have 40 of them but I think they may be inncorrect.
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