Crosman (and Benjamin) pump up air guns were always meant to be oiled/lubed on their linkage parts only for smooth operation.
Some of the early literature has language that tells the owner to carefully place a couple of drops of 'light machine oil' onto the felt washers of the pump arm IF the pump chamber is dry.
Caution is iincluded not to use too much oil as if any leaks into the air compression chamber, damage to the valves will result.
* Dieseling Effect is what you get,,we used to think it was kind of cool when we were kids. Smoke , bang and sometimes a flash!. But soon the little rifle didn't work so well as either an air rifle or a bang stick..**
It was tearing itself apart from the small explosion inside there.
That hole in the bbl shroud is an air intake hole and leads to the pump up chamber. NO OIL means just that as it would immediety place oil right onto the seals and piston inside.
It almost begs for some kid (like myself as I was at one time) to squirt some in there doesn't it!
No need to oil the bore, most all of them use a brass or bronze bore liner.
If anything, push just a clean soft cloth patch thru the bore and chamber..No Oil...
They sell felt 'pellets' for doing the cleaning job too if you really get that picky about it.
Wipe down the outside and a drop or two in the trigger mechanism if it needs it. That's about it. The main thing is that pump-up linkage. Keep that working smooth and don't over pump the things.
Here's a link to Crosmans website with old Owners manuals on Crosman, Benjamin and other older (and NEw) pellet rifles and pistols.
Some have parts diagrams, schematics, ect. Some better quality than others.
Most of these Crosman does NOT have any parts for anymore but there are AirGun fix-it places on the net that sell rebuild kits for them and they are pretty simple to rebuild/replace valves and seals in them.
Owner's Manuals and Parts Diagrams – Crosman
Added:
Here's one place with some parts:
JG Airguns, LLC
