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All Springer/NP/PCP Air Gun Discussion General > Crosman-Benjamin Air Gun Gate

repairing a crosman 110 rifle

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n.h.schmidt:
 I have been given a non working 110. It will not pump up. I have worked on pump up airguns before. Has anyone here worked on these guns? I have it almost all apart except for the air chamber. I made a tool and removed the nut. Do I also have to remove the stock bolt to get the air chamber out? Thanks in advance for any help.

happymecanic:

--- Quote from: n.h.schmidt on September 16, 2023, 06:40:42 PM --- I have been given a non working 110. It will not pump up. I have worked on pump up airguns before. Has anyone here worked on these guns? I have it almost all apart except for the air chamber. I made a tool and removed the nut. Do I also have to remove the stock bolt to get the air chamber out? Thanks in advance for any help.

--- End quote ---

Hi,

On these older models the air chamber is not removable, it's soldered into the tube and you can only remove the valve internals. If you don’t have to, don’t mess with the chamber, except for cleaning the check valve seat.

I have the Crosman service manual for these airguns in PDF format, if you wish to have it just PM me. The complete procedure is well detailed with diagrams and parts list ;).

threesuns:
Removing the stock would be good, so you can flush the compression chamber. Wouldn’t want any 50 year old crud messing with your new seals. And it may make reinstalling the valve components easier.

The 110 makes real good power with only 5-6 pumps!

n.h.schmidt:
Thanks for the replies . I made a special tool to remove the chamber nut. That unscrewed easy. So now the other parts should come out ?  That is except the soldered outer air chamber.     
  What to use for the pump piston cup?

happymecanic:

--- Quote from: n.h.schmidt on September 17, 2023, 01:05:43 PM ---Thanks for the replies . I made a special tool to remove the chamber nut. That unscrewed easy. So now the other parts should come out ?  That is except the soldered outer air chamber.     

--- End quote ---

That's correct.


--- Quote from: n.h.schmidt on September 17, 2023, 01:05:43 PM ---What to use for the pump piston cup?

--- End quote ---

Cut a 5/16'' steel washer in half, sharpen the straight edges into a wedge shape, at about a 30° angle. Put the edges of the washer in between the seal and piston head, making sure they're centered, and force them to lift the seal and brass retainer by tightening this assembly in a bench vise. It'll help if you first remove as much as you can of the old seal with a sharp knife. See my hand drawing, HTH:

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