Steering gear, what’s this cotter pin for?

no hole in an orginal filler plug

completely sealed unit

plug used for refill only if it leaks or needs a rebuild.

the only place it will leak is the seal on the sector shaft. if your pitman arm is oily and greasy top up your steering box... and add another awkward job to your list.

if those pins are soldered into the filler plug then a chain or lock wire can be added so that the plug can never be lost.

i'm guessing, clutching at straws

Dave