Sheridan Blue streak question

[Hw9720]

Have a 1975 .20 blue streak. It has a particular quirk happing to it. Release the pump arm to pump it and the pump arm releases (Returns to open pump location) like it is spring loaded. Pump it 3 time, 5 even 10 times pressure will not build past what the first pump charged. Anyone have this happen to them and know what is going on/

trim

 

[Chuck-in-Ohio]

Check valve is bad

 

[Treefrog]

Consider doing an alcohol flush. I think Chuck is right and that may well clear it. Do a search here if you don't know what that is. That and some proper lubrication may well cure it for you.

Luck,

J~

 

[5mm]

I had the same thing happen to my Blue Streak. I checked with my friend UJ, and he said it was the inlet valve. So Chuck is correct. I’m not sure an alcohol flush would help, it could, but in my case, my inlet valve was so mangled up, i had to replace it.

 

[.20calguy]

Have a 1975 .20 blue streak. It has a particular quirk happing to it. Release the pump arm to pump it and the pump arm releases (Returns to open pump location) like it is spring loaded. Pump it 3 time, 5 even 10 times pressure will not build past what the first pump charged. Anyone have this happen to them and know what is going on/

trim

Leaking checkvalve

 

[.20calguy]

Have a 1975 .20 blue streak. It has a particular quirk happing to it. Release the pump arm to pump it and the pump arm releases (Returns to open pump location) like it is spring loaded. Pump it 3 time, 5 even 10 times pressure will not build past what the first pump charged. Anyone have this happen to them and know what is going on/

trim

You can't hurt anything to try cleening and degreasing it first.
I use a small amout of foaming, spray cleaning degreasing agent into the air hole, pumping and shooting it through the valves. I've had success with that method a few times.
Don't over do it! It is a liquid and won't compress! Small amouts and patience...
If it works relube the pump cup with a little silicone oil only, otherwise it will be stiff and hard to pump.

 

[threesuns]

Atleast with the alcohol flush attempt, if it needs rebuild it will already be cleaned inside