[Solved] Pump mag question

[BLachance75]

I finally got all the pieces together and put my pump mag together and am having a slight issue.

I'm using a classic valve with level 7 bolt and a RT on/off and I'm pretty sure it has the 220 PT spacer.

If I put the valve in with the blue bumper on it shoots perfect, no leaks, good velocity. Today I pull the valve out and put on the bumper and wave spring and when I air it up it is fine, no leaks. When I pump it to reset the bolt it leaks down the barrel, a pretty good leak too. If I pull the trigger it shoots, sounds weak not as loud as if I dry fired with the blue bumper. The bolt stays forward as it should and again doesn't leak until I pump it to reset the bolt.

Any suggestions as to a possible issue or fix. Should I try a bigger or smaller sizer, I have 215 and 225.

[Spider-TW]

Shorter, 215

[zulubravo44]

I had a really smaller problem last week, and I solved it by sanding down the spacer just a little bit with some 150 grit. It seems like the pump kits need to have the ptube print a little deeper in the ptube.

[SPLATTER-ZONED]

I'm still using the original power tube spring in my Pump Mag and have not had any problems with velocity or leaking.

SZ

[BLachance75]

I'll play around with it tomorrow if I get a chance. I do have a PT spring so I can try that as well.

[zulubravo44]

I'm still using the original power tube spring in my Pump Mag and have not had any problems with velocity or leaking.

SZ

Did you trim your bolt spring? I think that was part of my issue that necessitated a shorter spacer.

[SPLATTER-ZONED]

No trimming. Just used a really worn bolt spring. I think it may be the original that came with the gun in 94.


SZ

[BLachance75]

The 215 worked perfectly and it is running great.