HELP HELP HELP HELP HELP HELP

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First things first. If you open the bleed valve, does it keep bleeding air out? If so, let it bleed all the way out so the gauge on the gun reads zero. 

2. When you say it’s stuck, did you pull back on the collar ring first? Or is that stuck? Play with this after you take all the air out of the system. You can always pump gun back later. 

3. If all of the above works, try to pump again. Make sure you open that bleed valve fast. The gun needs to have a quick change in pressure so the valve closes. 

If fails again, bleed out all the way again and either get someone local to help you or wait and call call company on 26th. 
 
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"intenseaty22"First things first. If you open the bleed valve, does it keep bleeding air out? If so, let it bleed all the way out so the gauge on the gun reads zero. 
2. When you say it’s stuck, did you pull back on the collar ring first? Or is that stuck? Play with this after you take all the air out of the system. You can always pump gun back later. 
3. If all of the above works, try to pump again. Make sure you open that bleed valve fast. The gun needs to have a quick change in pressure so the valve closes. 
If fails again, bleed out all the way again and either get someone local to help you or wait and call call company on 26th. 

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Thank you very much for your help I figured it worked.
 
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Had the same problem, just not as bad. The valve on the Marauder doesn't shut properly when the pressure from the pump, or air tank is released, so the pressure in the Marauder tank drops.

​Crossman said to get some Crosman Silicon Chamber Oil, and whenever you pump the gun up, put a drop of oil on the end of the Marauder Valve before pumping. That will lubricate the internal valve stem in the valve and allow it to close quickly when you depressurize the fill hose, allowing you to keep air in the Marauder tank.

​Took two or three tries to solve the valve problem, but the silicon oil did the trick. Yours may take a couple extra tries as it sounds more severe than mine.
 
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Crosman fibbed to you a bit.
Their fill valve design has no return spring unlike some other valves say an AA or Career which do have return springs. The only thing closing that fill valve is the air blowing by so it takes a fast bleed. The opposite can be help full when working on one, JUST barely crack the valve & leave it and it will drain the entire fill - do stiil be sfa eif trying this-. 
On thew crosman's a drop oil silly cone oil is a good idea as they are now know to corroded fairly fast.

Many people tend to fill too fast ( not with a pump naturally tho manufacturer did used to recommend 50 stokes max at a time) and bleed to slow.

John
 
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Never said there was a return spring, neither did Crossman. I was losing 2000 to 500 PSI on every fill till I started adding the silicone oil to lube the stem. Used both bottle and hand pump. Same problem, Gun air pressure dropped before the valve would close. Now, virtually no loss. The oil made a HUGE difference.

​Let's just say the Crossman rep on the phone (Yes, I did call) was VERY familiar with the problem and had the solution before I finished the description. Apparently very common. Give the oil a try and see what happens. Try it at least a half dozen times before giving up! I was ready to buy a new valve, but was really happy when I didn't have to.
 
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