Crosman 1377 advice

[Modski66]

Well the phase one 1377 is now mine, it has seen a bit of action, but does work, sort of...
It has apparently had new seals due to the valve leaking, it now holds air, but for some reason, it isn't very good at lobbing the lead very quickly, even after ten pumps.
Suggestions on where to look first would be welcome!
The other things of note are that the barrel is the original one, and the grip once had the crinkle finish paint, but now it is stripped back to base metal, apart from the last bit inside the trigger guard.
And to think, I could have had a brand new one for £95, but where would the fun be in that!

[--ped--]

check to see if it has a blowby valve or stem fitted also check that the non return valve is sealing properly
other things are worn cup seal or the seals were badly fitted and air is leaking past the valve
could also be leaking at tp or probe seal

[Modski66]

All the internals and seals seem okay, apart from a lot of oil slathered everywhere and the graunciest trigger I have ever used...
But the thing I don't know is if the piston seal that looks okay to me, is actually letting by on compression. Is there anything I should be looking for on the edge of the cup?

[--ped--]

if the pump cup has gone hard it doesn't seal fully
I fit a known good piston and seal to eliminate it when testing if in doubt but generally can tell if it's working
I put pressure in a valve then remove it and drop it in water to test for leaks when I do a tuned valve for people or convert to a flat top that way I 100% know it is right

[Modski66]

Thanks for the bubble tip, the cup seems soft, but I will try the leak test.
On another matter, I saw on the airgun forum last year, there was a discussion about the original stock for the 1377/1322. I can't access any of the pictures for some reason. I would like to get a stock for my 1377, but the new all-black model just doesn't seem to be the right thing.
Do you know where I can find a picture of the original wooden stock? I have ambitions to try and carve a copy if it isn't too complex in shape.
Cheers,
Mark.

[--ped--]

i'll see if I still have the pics on my old phone as I think the pics were some I put up
I'm not aware of any factory wooden stock apart from the 2250xe outdoorsman and it doesn't fit the phase 1 frame correctly

[Modski66]

Hmmmm. Not my cup of tea (fugly) I have seen pictures of that stock and thought it was an aftermarket one, not oem!
One last thing I would like to ask; the rifling in the barrel is not very distinct (my point of reference is a FWB 65 though), if I decide to change it, will a new one work with a phase one steel breech and probe?
In an old thread from 2010, it appears that a phase one barrel is too small for a phase three probe...

Cheers,

Mark.