Benjamin Marauder slow leak

losing 300 psi a day is not slow at all. My Huben K1 has exhibited a leakage of about 30 psi per day and yet the use of soapy water successfully identified the leakage location. The solution is polishing the seat of the Oring sealing the location 

https://www.youtube.com/watch?v=76XD9IHQjOU

The use of soapy water is limited to externally accessible locations. May be you can take out the airtube and submerge it in water to see where bubbles come out ?

Put some soapy water behind the gauge.

There is a weeper hole there.

I had a bad valve stem cause a leak on my gen 1 Marauder. Valve steam seat was worn. Air sounded like it was coming out the breach.

Agblitz,

Put a balloon or condom on the end of the barrel, fasten securely with a rubber band. In a few hours check it. Make sure it has no air in it, and is floppy. If it stands proud in the future, you have a valve leak. I've found that it doesn't take much as a fly spec of crap to do that, you won't even see it. Most of the time disassembly of the valve, and a good cleaning and reassembly, solve the problem.



Tom Holland 

Field Target Tech 

Agblitz,

Put a balloon or condom on the end of the barrel, fasten securely with a rubber band. In a few hours check it. Make sure it has no air in it, and is floppy. If it stands proud in the future, you have a valve leak. I've found that it doesn't take much as a fly spec of crap to do that, you won't even see it. Most of the time disassembly of the valve, and a good cleaning and reassembly, solve the problem.



Tom Holland 

Field Target Tech

Click to expand...

Now that's practicing "safe shooting" to a new level!

Phil,

I always practice safe shooting......hell, I might even use one as a wind flag!!!

Tom Holland 

Field Target Tech 

I would definitely check that pressure tube gauge. That has always been the culprit when I get leaks. Especially if you degassed and squished the same oring down under the gauge connection. I always put new oring underneath when I disassemble. 

Soapy water for sure will help

I have a Benjamin Discovery, model BP1K77. It has a .22 cal. barrel placed on top. This really gorgeous Frankenstein preforms great. However...the air will only fill in a barrel down position. If filled laying on it's side, it dumps all the air as the release valve is opened. The check valve, I think it's called, only works if the rifle is standing on end. Once properly filled it works really well when being continually used but leaks down over night. I have never tinkered with a PCP rifle, and this was my first PCP. I've been rambling again, don't even know if this will post. Any how, any ideas?