Hi guys new to the site I read all the time sounds like we all have the same bug Mack trucks ! So anyhow Ive been wrenching on Macks for a long time most of my life I own a RD 686S 1985 made in Canada has the 5 ft rear spread 285 engine mounted intercooler twin stick 6 20 front 44 rear tri axle just sp you guys know what ur dealing with. So im replacing the air compressor and I cant get the dip stick tube out. The packing nut is pipe thread it loosens up bout 1/4 turn but whole tube spins with nut ive sprayed with kroil , long wrech all my mite , and heated it thought the tube was egg shaped but its not. I cant remove compressor with it tje its rite up against it. There still available at 100.00 if I have to cut it any help would be awesome n make my week truck needs to go back to work Thanx alot Eddie
