CAN I GET PARTS FOR MY BENJAMIN SHERIDAN AIR PUMP PISTOL MODEL H9A IN .177 AND ALSO FOR .22. WILL VERY MUCH APPRECIATE YOUR HELP. BOTH SEEM NOT BUILD PRESSURE AFTER SEVERAL PUMPS.

This seemed to be a pretty insightful lead, http://www.pyramydair.com/blog/2005/09/fix-your-benjamin-or-sheridan-pneumatic-at-home/

Good Luck!

Contact the authorized repair facility in your area. It is listed in the back of the manual By Blue Streak I am assuming you have a C9 which is .20 caliber. They will direct you as to what can be done to fix or repair your air gun. I have a Benjamin Sheridan C9 Blue Streak from circa "95" when they still ad walnut stocks. I have shot maybe 20 pellets out of the 500 rounds in the red Diablo pellet box I bought with it. Paid a hefty $170 or so for it new. It is still like new. Bought a Beeman .177/.22 switch barrel barrel cocker. I hate all the pumping.

pyramidair.com has a seal kit. it also comes with a diagram. Benjamin and Sheridan air rifles do not have springs to propel the pellet. also never use vasalin. specifically for a Benjamin or Sheridan you need to use pelgun oil (also found at pyramideair.com). use pelgun oil because it is a non detergent fossil compound) the main intention is to condition the seals every 250 rounds. never use silicon based lube for this gun specifically. silicone lube is for spring air rifles such as break barrels.

http://www.crosman.com/airguns/service/repair

I couldn't find the model 317, But crosman bought benjamin, sheridan. Check it out.

http://www.pyramydair.com/site/manuals/benjamin-sheridan/ ,,, I think crosman bought out Bejamin/ Sheridan, If not, I'm sure one of them will get you a manual. I love those old guns, I had 3 of them at one time. If you have any luck, let Fixya know .

you can find parts diagram in crossman web page under other help compleat dig with part#s

http://www.pyramydair.com/blog/2005/09/fix-your-benjamin-or-sheridan.html

I recently purchased a rebuild kit for my 342. I bought the kit from airgundepot. It was the kit for the
392 and I modified it a little. On the new plunger, you have to drill a hole in the center of it the same
size as the pin's smallest diameter. You can use all of the parts in this kit except for the small o-ring. I think it sold for about 39 dollars or so. My rifle was manufactured in 1972 and it fires like new.