I have a bx25d with the rear tires loaded with rim guard and I cannot check the air pressure in the tires without the rim guard coming out . To check the pressures I first lift the rear tires off the ground with the stabilizers , I then put the tractor in neutral and rotate the valve stem to 12 clock . I then give the tire a shot of air to purge the valve stem of rim guard . But even after that I still get nothing but fluid . Should I drain some out ? Or is it just air pressure pushing the fluid out ?