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HW3TNT · New Member

I have a 1400 Crosman that I bought new years ago. It stopped working Jan of this year. I bought a new gasket kit and replaced all the rubber gaskets including the exhaust valve quad ring and it still wont pump up. I did not replace the pump rod assembly (140-075). Do you think this may be the problem? What else should I check or do? Where can I buy parts for my rifle? Thank you for your help.

AirGunEric · Site Admin

Did you replace the pump cup seal?

If not, you need to do this. If you did replace it, when you pump- where do you hear air leaking - i.e. close the bolt and determine if you are getting air out the barrel- in which case something is not set right inside the valve.

HW3TNT · New Member

No I did not replace the pump. I replaced all the interior washers. It worked great all these years then one day NOTHING. I remember when it worked I could hear air building up but now pumping does nothing. What would go bad, the felt washer? What should I do replace the (140-075 pump rod assembly) ? If you think that may be the problem can you please tell me where I can buy one. I do not have any tools to press on parts with. I have heard that I would need a press to repair or rebuild pump. I will need to buy the pump I guess.Thanks for your help! H3

HW3TNT · New Member

I just ordered a Flat Head Rebuild Kit from http://www.mac1airgunshop.com/flat-head-piston-for-early-crosmans-p/mflhereki.htm So I think I will have good luck with this. I will keep you posted. Thanks for your replies.