Madbull XC-03 Co2 charger wont regulate pressure...

The Tradesman · September 4th, 2011, 08:55

Hey, I've had Mad bull XC-03 co2 charger for a couple weeks now and have used it with no problems. Well i went to use it for a game this weekend and when i twisted the Co2 into the regulator the gauge wont start at a low pressure anymore, it jumps right to 900psi or so. I took the flat tip screw cap out and noticed that the seal around it was torn right up and there was seal fragments in the airway passage. I cleaned that out, took it apart and oiled it and used teflon tape on the threads to maintain a seal on the flat head tip. Well this did nothing, it still jumps right up to 900 or so psi... Any help would be greatly apreciated.

MadMax · September 4th, 2011, 14:14

Sounds like the pilot valve seal is toast. Most regulators bear a spring against a moving piston which either pushes on a needle valve stem (common to many paintball regs) which opens an inlet. This allows gas from the high pressure side to push into regulated side. Eventually gas pressure raises in the regulated side which changes the piston direction so it lets off of the valve. Adjusting the screw changes the setpoint by adjusting the spring force exerted to the piston. The piston's recharge setpoint is caused by the summation of the spring and atmospheric pressure balancing against the opposing regulated chamber pressure.

Anyways, long and short I suspect that the valve that controls gas flow between your bottle and regulated pressure chamber is broken. Either that, or your piston is jammed by broken oring bigs from your side tap plug so it's seized in the opening position.

The Tradesman · September 4th, 2011, 18:29

Hmmm.... I see. i thought i got all of the fragments out, i noticed on the charger that there is a section that requires a adjustable wrench to take apart, and mine are at work. Do you think there are more pieces in there and is that how taht piece comes apart? Or should i unthread the valve meter and see whats in there, i was just paranoid of taking the meter out. Thanks for your help.

MadMax · September 5th, 2011, 02:13

Sorry, I haven't got my regulator handy. It's at the shop.

I did find their user's manual online though:

http://www.madbullairsoft.com/doc/XC...r%20Manual.pdf

My guess is that you're going to have to disassemble the regulator to clear out whatever may be jamming the piston "Pressure adjustment valve" #13. I don't think removing the gauge will be necessary. It's tapped into a hole that's drilled to connect to the regulated side. You'll probably have to take out #14 though. I can't remember if that requires a pin spanner though.

The Tradesman · September 5th, 2011, 07:51

ya I already took 13 and 14 apart and cleaned it all out... sigh, guess shes busted. Yeah you do need a pin wrench for it.

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September 4th, 2011, 14:14	#2
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	Sounds like the pilot valve seal is toast. Most regulators bear a spring against a moving piston which either pushes on a needle valve stem (common to many paintball regs) which opens an inlet. This allows gas from the high pressure side to push into regulated side. Eventually gas pressure raises in the regulated side which changes the piston direction so it lets off of the valve. Adjusting the screw changes the setpoint by adjusting the spring force exerted to the piston. The piston's recharge setpoint is caused by the summation of the spring and atmospheric pressure balancing against the opposing regulated chamber pressure. Anyways, long and short I suspect that the valve that controls gas flow between your bottle and regulated pressure chamber is broken. Either that, or your piston is jammed by broken oring bigs from your side tap plug so it's seized in the opening position. __________________ Want nearly free GBB gas?

September 4th, 2011, 18:29	#3
The Tradesman Diesel7 blame Reignman Trader rating Join Date: May 2011 Location: Kingston, Ontario	Hmmm.... I see. i thought i got all of the fragments out, i noticed on the charger that there is a section that requires a adjustable wrench to take apart, and mine are at work. Do you think there are more pieces in there and is that how taht piece comes apart? Or should i unthread the valve meter and see whats in there, i was just paranoid of taking the meter out. Thanks for your help. __________________ Coming in second just means that you are the first loser. Last edited by The Tradesman; September 4th, 2011 at 18:42..

September 5th, 2011, 02:13	#4
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	Sorry, I haven't got my regulator handy. It's at the shop. I did find their user's manual online though: http://www.madbullairsoft.com/doc/XC...r%20Manual.pdf My guess is that you're going to have to disassemble the regulator to clear out whatever may be jamming the piston "Pressure adjustment valve" #13. I don't think removing the gauge will be necessary. It's tapped into a hole that's drilled to connect to the regulated side. You'll probably have to take out #14 though. I can't remember if that requires a pin spanner though. __________________ Want nearly free GBB gas?

September 4th, 2011, 08:55	#1
The Tradesman Diesel7 blame Reignman Trader rating Join Date: May 2011 Location: Kingston, Ontario	Madbull XC-03 Co2 charger wont regulate pressure... Hey, I've had Mad bull XC-03 co2 charger for a couple weeks now and have used it with no problems. Well i went to use it for a game this weekend and when i twisted the Co2 into the regulator the gauge wont start at a low pressure anymore, it jumps right to 900psi or so. I took the flat tip screw cap out and noticed that the seal around it was torn right up and there was seal fragments in the airway passage. I cleaned that out, took it apart and oiled it and used teflon tape on the threads to maintain a seal on the flat head tip. Well this did nothing, it still jumps right up to 900 or so psi... Any help would be greatly apreciated. __________________ Coming in second just means that you are the first loser.

September 5th, 2011, 07:51	#5
The Tradesman Diesel7 blame Reignman Trader rating Join Date: May 2011 Location: Kingston, Ontario	ya I already took 13 and 14 apart and cleaned it all out... sigh, guess shes busted. Yeah you do need a pin wrench for it. __________________ Coming in second just means that you are the first loser.

Madbull XC-03 Co2 charger wont regulate pressure...

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