Pump arm brackets needed

Try google

Reseal Repair Seal Kit for Benjamin 340 342 347 Air Rifles eBay

Benjamin 342 22 seal repairs Airguns Guns Forum

Benjamin pellet gun repair advice help needed

It's called a "sight"

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

Hello. Pellet guns are fun. It sounds like the air tanks seals are warn out and causing the air to leak out. The best thing to do is buy a new one. Good Luck.

If you have the old one , take it with you to a hardware store or auto parts store. They have all types of o rings and you can match it up.

Dear Aijaz Talpur,
I am Salman. Nice to see your question about bending barrels of Benjamin Franklin 342s airguns. I suggest you take the barrels to some Lathe Machine Expert (Kharadia). He will easily straighten them. I live in Nawabshah Sindh and have used a huge number of Diana, BSA, Crosman Benjamin and some pakistani airguns.

Please feel free to contact on 03018564852 for further help.

Regards
SALMAN

send it to your local gun store and see if they can fix it....

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.