I need to open my clutch receiver and I don't have the required tools. Any tips?

Big socket maybe.

You need a bolt the head of which fits 6 of the twelve points in the cap, same as you would select a socket to suit a bolt but reversed, hold the body of the receiver in a vice a a big pair of steelsons on the thread of your bolt, can add a bitof heat if required,

vice, hammer, & screw driver, if u got skills

Pretty sure you can do everything you want for maintenance from the other side.