yea if you have a tank with removable breather cap that is where you would normaly fill it . go get 10 wt. hyd oil crawl under and add 3 or 4 qts and ingage pto close dump valve. raise bed untill it stops moving. disengage pto .
put a long block in the pinch between the bed and frame in case the bed comes down so you don't get cut in half. add a quart at a time and raise the bed more. keep doing that untill the bed reaches the top.
take the block out and lower the bed and reraise the bed and relower to get all the air out. when it raises smooth all the way to the top without sucking air you got her full.
if you over fill it will gush out the breather cap and make a heck of a mess.
WARNING ALLWAYS STAY OUT OF THE PINCH DE DUMP BED WILL REMOVE BODY PARTS

i thinkzz traveling along at terminal velocity will soon wear a body out.

i will not die in shame if i never finish my dreams because my family iz my reality

can't wait until we can bed de ponys down, lite de fire, put on a big ol pot of coffee, and talk about how strong and brave our teams are.

bullfoot thinkszzzzzzzzzzz