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All Springer/NP/PCP Air Gun Discussion General > American/U.S. Air Gun Gates

Sheridan C9 Silver Streak question about pump action

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quattroatl:
I recently acquired two Silver Streaks. They were owned by two brothers. Their serial numbers are within 3 final digits. One of the two rifles seems to have a much easier lifting action when pumping. I barely grab the pump arm and it opens. The other Silver Streak and my Benjamin 392P both require much more force on the initial pull. I hope I am describing this correctly.

Can anyone explain what might be the reason or issue?  I do not have pellets yet to test.

Thanks for any insight and help.

19Sheridan57:
  May just need lubricating. Look for the oiling points in this manual, which is virtually the same manual as for a Sheridan.

https://images-na.ssl-images-amazon.com/images/I/817fEQ2tDCL.pdf

Frank in Fairfield:
Do NOT put any oil in the chamber.
Oil only the hinge points.
The cup is synthetic and requires no oil.
The cup is worn out.
Replacements are available from Crosman.

JPSAXNC:
The piston is adjustable, the gun that opens harder has it's piston adjusted further out so when the arm is closed the piston is pressing on the valve face causing the linkage to cam over. That's the force you feel when opening the lever. HTH

bantam5s:

--- Quote from: JPSAXNC on February 12, 2025, 05:54:36 PM ---The piston is adjustable, the gun that opens harder has it's piston adjusted further out so when the arm is closed the piston is pressing on the valve face causing the linkage to cam over. That's the force you feel when opening the lever. HTH

--- End quote ---
I don't believe the pistons on these Crosman made guns are adjustable.
Sheridan had dropped the adjustable pistons at some point,  I don't know when but I know they were dropped by the time my blue streak was made in '79 and I see no reason why Crosman would add the expense of going back to an adjustable piston.

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