oh he is taking the thing by my radiator out and we are installing a electric fan, and using the air conditioner pump and modifying it for me to flip a switch to deflate my tires for crawling to like 10lbs (he said it is better than hard tires, they glide over the rocks) and re-inflate them when I am done. Going to be hooked to a toggle switch and gauge in cab. I am not 100% on the details. I saw it in his crawler. when I get it done I will take a picture.