I am ready to remove the cab from my 51 3100. I am thinking of removing the steering box and column from the frame so I don't have to lift it so high to get it off.I understand I will need a puller to remove the Pittman arm from the box, but how do I disconnect the bottom of the Pittman arm from the drag link?It looks like there is a real large screw in the end. I have never done this before so I want to be carefull not to ruin anything. Should I mark the Pittman arm and box so it goes back exactly as it was ?? Thanks in advance for your help.