I was wondering the best way to jack up my 5th wheel to remove the whells. I noticed that the rubber valve stems are cracking real bad and want to get them changed to metal ones but have never jacked up the 5th wheel before to remove the wheels. I do have a 4 ton bottle jack and was wanting to know if I just put it under the axle and jack it up or What??? Any suggestions or direction would be appreciated. The tires themselves appear to be in good condition. Getting ready for the season and can't wait much longer to get out.